/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 EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:23:51,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:23:51,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:23:51,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:23:51,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:23:51,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:23:51,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:23:51,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:23:51,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:23:51,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:23:51,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:23:51,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:23:51,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:23:51,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:23:51,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:23:51,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:23:51,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:23:51,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:23:51,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:23:51,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:23:51,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:23:51,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:23:51,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:23:51,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:23:51,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:23:51,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:23:51,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:23:51,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:23:51,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:23:51,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:23:51,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:23:51,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:23:51,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:23:51,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:23:51,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:23:51,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:23:51,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:23:51,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:23:51,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:23:51,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:23:51,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:23:51,794 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 11:23:51,812 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:23:51,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:23:51,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:23:51,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:23:51,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:23:51,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:23:51,813 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:23:51,813 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:23:51,813 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:23:51,813 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:23:51,813 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:23:51,814 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:23:51,814 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:23:51,814 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:23:51,814 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:23:51,815 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:23:51,815 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:23:51,816 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:23:51,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:23:51,816 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:23:51,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:23:51,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:23:51,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:23:51,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:23:51,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:23:51,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:23:51,817 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:23:51,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:23:51,817 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:23:51,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:23:51,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:23:51,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:23:51,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:23:51,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:23:51,818 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:23:51,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:23:51,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:23:51,818 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:23:51,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:23:51,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:23:51,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:23:51,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:23:52,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:23:52,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:23:52,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:23:52,061 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:23:52,062 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:23:52,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2023-04-01 11:23:53,172 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:23:53,351 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:23:53,352 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2023-04-01 11:23:53,358 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f1636440/96a37f0c3146401ab2d1d2657b5eb7f8/FLAG579fc1ae9 [2023-04-01 11:23:53,373 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f1636440/96a37f0c3146401ab2d1d2657b5eb7f8 [2023-04-01 11:23:53,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:23:53,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:23:53,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:23:53,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:23:53,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:23:53,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@227a61ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53, skipping insertion in model container [2023-04-01 11:23:53,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:23:53,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:23:53,514 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/fermat2-ll_unwindbound2.c[524,537] [2023-04-01 11:23:53,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:23:53,535 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:23:53,545 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/fermat2-ll_unwindbound2.c[524,537] [2023-04-01 11:23:53,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:23:53,561 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:23:53,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53 WrapperNode [2023-04-01 11:23:53,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:23:53,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:23:53,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:23:53,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:23:53,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,580 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:23:53,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:23:53,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:23:53,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:23:53,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (1/1) ... [2023-04-01 11:23:53,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:23:53,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:53,609 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 11:23:53,614 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 11:23:53,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:23:53,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:23:53,646 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:23:53,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:23:53,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:23:53,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:23:53,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:23:53,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:23:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:23:53,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:23:53,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:23:53,715 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:23:53,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:23:53,891 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:23:53,933 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:23:53,933 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:23:53,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:23:53 BoogieIcfgContainer [2023-04-01 11:23:53,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:23:53,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:23:53,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:23:53,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:23:53,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:23:53" (1/3) ... [2023-04-01 11:23:53,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411e83df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:23:53, skipping insertion in model container [2023-04-01 11:23:53,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:23:53" (2/3) ... [2023-04-01 11:23:53,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411e83df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:23:53, skipping insertion in model container [2023-04-01 11:23:53,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:23:53" (3/3) ... [2023-04-01 11:23:53,942 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound2.c [2023-04-01 11:23:53,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:23:53,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:23:54,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:23:54,042 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;@62bbed98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:23:54,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:23:54,046 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 11:23:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:23:54,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:54,054 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:23:54,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:54,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1539655439, now seen corresponding path program 1 times [2023-04-01 11:23:54,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:54,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80460973] [2023-04-01 11:23:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:54,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:54,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:54,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582937828] [2023-04-01 11:23:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:54,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:54,151 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 11:23:54,153 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 11:23:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:23:54,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:23:54,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:23:54,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:23:54,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:54,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80460973] [2023-04-01 11:23:54,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:54,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582937828] [2023-04-01 11:23:54,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582937828] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:23:54,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:23:54,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:23:54,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806710385] [2023-04-01 11:23:54,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:23:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:23:54,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:23:54,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:23:54,285 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:23:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:23:54,319 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-04-01 11:23:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:23:54,321 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-04-01 11:23:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:23:54,326 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:23:54,326 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 11:23:54,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 11:23:54,354 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:23:54,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:23:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 11:23:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 11:23:54,381 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 11:23:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-01 11:23:54,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2023-04-01 11:23:54,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:23:54,384 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-01 11:23:54,384 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:23:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-01 11:23:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:23:54,385 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:54,386 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:23:54,397 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 11:23:54,591 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 11:23:54,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:54,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:54,592 INFO L85 PathProgramCache]: Analyzing trace with hash -98483365, now seen corresponding path program 1 times [2023-04-01 11:23:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:54,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700319536] [2023-04-01 11:23:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:54,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:54,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:54,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025548198] [2023-04-01 11:23:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:54,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:54,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:54,609 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 11:23:54,619 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 11:23:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:23:54,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:23:54,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:23:54,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:23:54,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700319536] [2023-04-01 11:23:54,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025548198] [2023-04-01 11:23:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025548198] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:23:54,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:23:54,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:23:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411045936] [2023-04-01 11:23:54,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:23:54,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:23:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:23:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:23:54,736 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:23:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:23:54,763 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-04-01 11:23:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:23:54,764 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2023-04-01 11:23:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:23:54,765 INFO L225 Difference]: With dead ends: 30 [2023-04-01 11:23:54,765 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 11:23:54,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 11:23:54,767 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:23:54,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:23:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 11:23:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 11:23:54,772 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 11:23:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 11:23:54,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2023-04-01 11:23:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:23:54,773 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 11:23:54,774 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:23:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 11:23:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:23:54,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:54,774 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:23:54,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:23:54,980 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 11:23:54,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:54,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:54,982 INFO L85 PathProgramCache]: Analyzing trace with hash -96695905, now seen corresponding path program 1 times [2023-04-01 11:23:54,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:54,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383746329] [2023-04-01 11:23:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:54,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368032629] [2023-04-01 11:23:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:54,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:55,001 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 11:23:55,002 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 11:23:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:23:55,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 11:23:55,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:23:55,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:23:55,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383746329] [2023-04-01 11:23:55,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368032629] [2023-04-01 11:23:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368032629] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:23:55,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:23:55,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:23:55,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271127656] [2023-04-01 11:23:55,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:23:55,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:23:55,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:23:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:23:55,313 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:23:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:23:55,721 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-04-01 11:23:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:23:55,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 18 [2023-04-01 11:23:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:23:55,724 INFO L225 Difference]: With dead ends: 32 [2023-04-01 11:23:55,724 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 11:23:55,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:23:55,727 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:23:55,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 59 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:23:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 11:23:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-04-01 11:23:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 11:23:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-04-01 11:23:55,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2023-04-01 11:23:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:23:55,737 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-04-01 11:23:55,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:23:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-04-01 11:23:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 11:23:55,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:55,738 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, 1] [2023-04-01 11:23:55,752 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 11:23:55,947 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 11:23:55,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:55,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash -353290452, now seen corresponding path program 1 times [2023-04-01 11:23:55,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:55,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414499408] [2023-04-01 11:23:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:55,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:55,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:55,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665028594] [2023-04-01 11:23:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:55,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:55,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:55,965 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 11:23:55,968 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 11:23:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:23:56,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 11:23:56,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:23:56,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:23:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:23:56,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:56,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414499408] [2023-04-01 11:23:56,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:56,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665028594] [2023-04-01 11:23:56,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665028594] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:23:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880786512] [2023-04-01 11:23:56,314 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:23:56,314 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:23:56,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:23:56,321 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:23:56,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:23:56,480 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:23:57,321 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 11:23:57,343 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:23:57,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:23:57,356 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:23:59,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [880786512] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:23:59,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:23:59,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8, 7] total 25 [2023-04-01 11:23:59,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974774314] [2023-04-01 11:23:59,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:23:59,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:23:59,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:23:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:23:59,393 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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 11:24:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:24:00,420 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-04-01 11:24:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:24:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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) Word has length 24 [2023-04-01 11:24:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:24:00,421 INFO L225 Difference]: With dead ends: 36 [2023-04-01 11:24:00,421 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 11:24:00,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:24:00,423 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:24:00,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 16 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:24:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 11:24:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 11:24:00,436 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 11:24:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 11:24:00,437 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2023-04-01 11:24:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:24:00,437 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 11:24:00,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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 11:24:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 11:24:00,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 11:24:00,438 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:24:00,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:24:00,453 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 11:24:00,646 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 11:24:00,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:24:00,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:24:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1507720734, now seen corresponding path program 1 times [2023-04-01 11:24:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:24:00,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407291781] [2023-04-01 11:24:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:24:00,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:24:00,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:24:00,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287091784] [2023-04-01 11:24:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:24:00,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:24:00,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:24:00,661 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 11:24:00,664 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 11:24:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:24:00,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:24:00,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:24:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:24:00,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:24:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:24:00,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:24:00,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407291781] [2023-04-01 11:24:00,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:24:00,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287091784] [2023-04-01 11:24:00,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287091784] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:24:00,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143473499] [2023-04-01 11:24:00,833 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:24:00,833 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:24:00,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:24:00,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:24:00,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:24:00,900 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:24:01,750 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 11:24:01,754 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:24:01,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:24:01,762 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:24:02,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '881#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:24:02,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:24:02,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:24:02,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2023-04-01 11:24:02,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953235533] [2023-04-01 11:24:02,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:24:02,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:24:02,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:24:02,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:24:02,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-04-01 11:24:02,286 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 11:24:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:24:02,319 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-04-01 11:24:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:24:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2023-04-01 11:24:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:24:02,320 INFO L225 Difference]: With dead ends: 38 [2023-04-01 11:24:02,320 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 11:24:02,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-04-01 11:24:02,321 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:24:02,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:24:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 11:24:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 11:24:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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 11:24:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-04-01 11:24:02,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2023-04-01 11:24:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:24:02,329 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-04-01 11:24:02,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 11:24:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-04-01 11:24:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 11:24:02,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:24:02,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:24:02,365 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 11:24:02,534 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 11:24:02,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:24:02,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:24:02,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1509508194, now seen corresponding path program 1 times [2023-04-01 11:24:02,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:24:02,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069383107] [2023-04-01 11:24:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:24:02,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:24:02,544 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:24:02,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74806637] [2023-04-01 11:24:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:24:02,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:24:02,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:24:02,548 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 11:24:02,550 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 11:24:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:24:02,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:24:02,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:24:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:24:08,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:24:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:24:10,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:24:10,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069383107] [2023-04-01 11:24:10,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:24:10,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74806637] [2023-04-01 11:24:10,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74806637] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:24:10,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246281088] [2023-04-01 11:24:10,467 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 11:24:10,467 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:24:10,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:24:10,467 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:24:10,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:24:10,498 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:24:11,191 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 11:24:11,205 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:24:11,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:24:11,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:24:11,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1163#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:24:11,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:24:11,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:24:11,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2023-04-01 11:24:11,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758640059] [2023-04-01 11:24:11,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:24:11,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:24:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:24:11,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:24:11,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:24:11,910 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 11:24:13,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:24:17,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:24:19,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:24:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:24:22,999 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-04-01 11:24:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:24:22,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2023-04-01 11:24:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:24:23,000 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:24:23,000 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 11:24:23,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=103, Invalid=708, Unknown=1, NotChecked=0, Total=812 [2023-04-01 11:24:23,002 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:24:23,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 111 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2023-04-01 11:24:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 11:24:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-04-01 11:24:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 6 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 11:24:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-04-01 11:24:23,012 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2023-04-01 11:24:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:24:23,012 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-04-01 11:24:23,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 11:24:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-04-01 11:24:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:24:23,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:24:23,014 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:24:23,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 11:24:23,219 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 11:24:23,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:24:23,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:24:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash 538547119, now seen corresponding path program 1 times [2023-04-01 11:24:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:24:23,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422775206] [2023-04-01 11:24:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:24:23,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:24:23,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:24:23,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771912619] [2023-04-01 11:24:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:24:23,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:24:23,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:24:23,265 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 11:24:23,268 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 11:24:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:24:23,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 11:24:23,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:24:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:24:23,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:24:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:24:23,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:24:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422775206] [2023-04-01 11:24:23,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:24:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771912619] [2023-04-01 11:24:23,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771912619] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:24:23,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428172074] [2023-04-01 11:24:23,457 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:24:23,457 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:24:23,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:24:23,458 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:24:23,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:24:23,488 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:24:24,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 11:24:24,239 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:24:24,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:24:24,247 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:24:24,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1494#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:24:24,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:24:24,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:24:24,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-01 11:24:24,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43033884] [2023-04-01 11:24:24,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:24:24,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:24:24,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:24:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:24:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:24:24,853 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 11:24:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:24:24,981 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2023-04-01 11:24:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:24:24,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 32 [2023-04-01 11:24:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:24:24,982 INFO L225 Difference]: With dead ends: 38 [2023-04-01 11:24:24,982 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 11:24:24,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:24:24,984 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:24:24,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 83 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:24:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 11:24:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 11:24:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 6 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 11:24:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-04-01 11:24:24,994 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2023-04-01 11:24:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:24:24,994 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-04-01 11:24:24,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 11:24:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-04-01 11:24:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 11:24:24,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:24:24,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:24:25,025 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 11:24:25,199 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 11:24:25,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:24:25,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:24:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash -429832735, now seen corresponding path program 2 times [2023-04-01 11:24:25,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:24:25,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182117699] [2023-04-01 11:24:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:24:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:24:25,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:24:25,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333514052] [2023-04-01 11:24:25,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:24:25,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:24:25,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:24:25,210 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 11:24:25,212 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 11:24:25,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:24:25,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-04-01 11:24:25,276 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 11:24:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 11:24:25,326 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 11:24:25,327 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 11:24:25,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 11:24:25,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 11:24:25,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 11:24:25,532 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-04-01 11:24:25,535 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 11:24:25,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 11:24:25 BoogieIcfgContainer [2023-04-01 11:24:25,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 11:24:25,559 INFO L158 Benchmark]: Toolchain (without parser) took 32182.96ms. Allocated memory was 188.7MB in the beginning and 300.9MB in the end (delta: 112.2MB). Free memory was 146.9MB in the beginning and 170.0MB in the end (delta: -23.1MB). Peak memory consumption was 89.8MB. Max. memory is 8.0GB. [2023-04-01 11:24:25,559 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 143.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 11:24:25,560 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.69ms. Allocated memory is still 188.7MB. Free memory was 146.9MB in the beginning and 136.3MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 11:24:25,560 INFO L158 Benchmark]: Boogie Preprocessor took 20.10ms. Allocated memory is still 188.7MB. Free memory was 136.3MB in the beginning and 135.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 11:24:25,560 INFO L158 Benchmark]: RCFGBuilder took 352.25ms. Allocated memory is still 188.7MB. Free memory was 134.7MB in the beginning and 122.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-04-01 11:24:25,560 INFO L158 Benchmark]: TraceAbstraction took 31621.89ms. Allocated memory was 188.7MB in the beginning and 300.9MB in the end (delta: 112.2MB). Free memory was 121.4MB in the beginning and 170.0MB in the end (delta: -48.6MB). Peak memory consumption was 64.6MB. Max. memory is 8.0GB. [2023-04-01 11:24:25,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 143.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 181.69ms. Allocated memory is still 188.7MB. Free memory was 146.9MB in the beginning and 136.3MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.10ms. Allocated memory is still 188.7MB. Free memory was 136.3MB in the beginning and 135.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 352.25ms. Allocated memory is still 188.7MB. Free memory was 134.7MB in the beginning and 122.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 31621.89ms. Allocated memory was 188.7MB in the beginning and 300.9MB in the end (delta: 112.2MB). Free memory was 121.4MB in the beginning and 170.0MB in the end (delta: -48.6MB). Peak memory consumption was 64.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [A=5, R=1, \old(counter)=0, counter=0] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(A % 2 == 1) VAL [A=5, R=1, \old(counter)=0, counter=0] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [A=5, R=1, \old(counter)=0, counter=0, r=-4, u=3, v=1] [L34] EXPR counter++ VAL [A=5, R=1, \old(counter)=0, counter++=0, counter=1, r=-4, u=3, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=5, R=1, \old(counter)=0, counter=1, r=-4, u=3, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=5, R=1, \old(counter)=0, counter=1, r=-1, u=5, v=1] [L34] EXPR counter++ VAL [A=5, R=1, \old(counter)=0, counter++=1, counter=2, r=-1, u=5, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=5, R=1, \old(counter)=0, counter=2, r=-1, u=5, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=5, R=1, \old(counter)=0, counter=2, r=4, u=7, v=1] [L34] EXPR counter++ VAL [A=5, R=1, \old(counter)=0, counter++=2, counter=3, r=4, u=7, v=1] [L34] COND FALSE !(counter++<2) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31.5s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 12.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 71 SdHoareTripleChecker+Valid, 8.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 70 mSDsluCounter, 392 SdHoareTripleChecker+Invalid, 8.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 274 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 481 IncrementalHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 118 mSDtfsCounter, 481 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 390 GetRequests, 278 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 1475 SizeOfPredicates, 15 NumberOfNonLiveVariables, 682 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 54/68 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 21, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 16, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 14, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 38, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 60, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 12, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 21, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 169, DAG_COMPRESSION_RETAINED_NODES: 68, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-01 11:24:25,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...