/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:21:26,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:21:26,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:21:26,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:21:26,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:21:26,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:21:26,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:21:26,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:21:26,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:21:26,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:21:26,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:21:26,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:21:26,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:21:26,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:21:26,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:21:26,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:21:26,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:21:26,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:21:26,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:21:26,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:21:26,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:21:26,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:21:26,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:21:26,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:21:26,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:21:26,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:21:26,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:21:26,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:21:26,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:21:26,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:21:26,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:21:26,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:21:26,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:21:26,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:21:26,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:21:26,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:21:26,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:21:26,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:21:26,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:21:26,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:21:26,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:21:26,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 23:21:26,903 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:21:26,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:21:26,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:21:26,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:21:26,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:21:26,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:21:26,905 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:21:26,905 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:21:26,906 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:21:26,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:21:26,906 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:21:26,906 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:21:26,907 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:21:26,907 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:21:26,907 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:21:26,907 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:21:26,907 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:21:26,907 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:21:26,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:21:26,908 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:21:26,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:21:26,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:21:26,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:21:26,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:21:26,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:21:26,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:21:26,909 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:21:26,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:21:26,909 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:21:26,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:21:26,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:21:26,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:21:26,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:21:26,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:21:26,910 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:21:26,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:21:26,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:21:26,910 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:21:26,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:21:26,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:21:26,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:21:26,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:21:27,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:21:27,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:21:27,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:21:27,150 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:21:27,150 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:21:27,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2023-04-02 23:21:28,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:21:28,452 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:21:28,453 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2023-04-02 23:21:28,458 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf41749c9/37aa0bef4c1a423a8a75388d5c27231a/FLAG44be5983e [2023-04-02 23:21:28,472 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf41749c9/37aa0bef4c1a423a8a75388d5c27231a [2023-04-02 23:21:28,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:21:28,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:21:28,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:21:28,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:21:28,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:21:28,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a8840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28, skipping insertion in model container [2023-04-02 23:21:28,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:21:28,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:21:28,609 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/prod4br-ll_unwindbound100.c[524,537] [2023-04-02 23:21:28,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:21:28,630 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:21:28,638 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/prod4br-ll_unwindbound100.c[524,537] [2023-04-02 23:21:28,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:21:28,656 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:21:28,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28 WrapperNode [2023-04-02 23:21:28,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:21:28,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:21:28,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:21:28,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:21:28,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:21:28,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:21:28,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:21:28,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:21:28,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (1/1) ... [2023-04-02 23:21:28,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:21:28,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:28,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 23:21:28,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 23:21:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:21:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:21:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:21:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:21:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:21:28,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:21:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:21:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:21:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:21:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:21:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:21:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:21:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:21:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:21:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:21:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:21:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:21:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:21:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:21:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:21:28,794 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:21:28,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:21:28,958 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:21:29,116 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:21:29,117 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:21:29,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:21:29 BoogieIcfgContainer [2023-04-02 23:21:29,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:21:29,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:21:29,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:21:29,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:21:29,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:21:28" (1/3) ... [2023-04-02 23:21:29,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1660408e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:21:29, skipping insertion in model container [2023-04-02 23:21:29,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:28" (2/3) ... [2023-04-02 23:21:29,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1660408e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:21:29, skipping insertion in model container [2023-04-02 23:21:29,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:21:29" (3/3) ... [2023-04-02 23:21:29,126 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2023-04-02 23:21:29,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:21:29,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:21:29,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:21:29,192 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;@165b3987, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:21:29,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:21:29,196 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) [2023-04-02 23:21:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 23:21:29,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:29,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:29,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:29,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:29,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1357817023, now seen corresponding path program 1 times [2023-04-02 23:21:29,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:29,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963931412] [2023-04-02 23:21:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:29,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:29,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:29,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963931412] [2023-04-02 23:21:29,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 23:21:29,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810881869] [2023-04-02 23:21:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:29,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:29,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:29,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:29,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:21:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:29,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 23:21:29,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:29,404 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:21:29,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810881869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:21:29,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:21:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:21:29,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716224204] [2023-04-02 23:21:29,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:29,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:21:29,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:21:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:21:29,435 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:21:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:29,469 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-02 23:21:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:21:29,471 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-02 23:21:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:29,476 INFO L225 Difference]: With dead ends: 41 [2023-04-02 23:21:29,476 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 23:21:29,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:21:29,481 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 [2023-04-02 23:21:29,482 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] [2023-04-02 23:21:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 23:21:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 23:21:29,506 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) [2023-04-02 23:21:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-02 23:21:29,508 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2023-04-02 23:21:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:29,509 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-02 23:21:29,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:21:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-02 23:21:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:21:29,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:29,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:29,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:21:29,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 23:21:29,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:29,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash -20479242, now seen corresponding path program 1 times [2023-04-02 23:21:29,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:29,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168564029] [2023-04-02 23:21:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:29,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:29,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:29,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407702872] [2023-04-02 23:21:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:29,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:29,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:29,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:21:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:29,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:21:29,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:29,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:21:29,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:29,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168564029] [2023-04-02 23:21:29,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:29,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407702872] [2023-04-02 23:21:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407702872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:21:29,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:21:29,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:21:29,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462274287] [2023-04-02 23:21:29,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:29,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:21:29,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:29,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:21:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:21:29,855 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 23:21:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:29,883 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-02 23:21:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:21:29,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-02 23:21:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:29,886 INFO L225 Difference]: With dead ends: 31 [2023-04-02 23:21:29,886 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 23:21:29,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:21:29,887 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:29,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:21:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 23:21:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 23:21:29,892 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) [2023-04-02 23:21:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-02 23:21:29,893 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-04-02 23:21:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:29,893 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-02 23:21:29,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 23:21:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-02 23:21:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:21:29,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:29,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:29,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:21:30,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 23:21:30,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:30,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash -18691782, now seen corresponding path program 1 times [2023-04-02 23:21:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:30,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769565593] [2023-04-02 23:21:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:30,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:30,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:30,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47623010] [2023-04-02 23:21:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:30,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:30,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:30,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:30,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:21:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:30,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 23:21:30,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:30,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:21:30,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:30,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769565593] [2023-04-02 23:21:30,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:30,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47623010] [2023-04-02 23:21:30,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47623010] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:21:30,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:21:30,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:21:30,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032854200] [2023-04-02 23:21:30,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:30,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:21:30,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:21:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:21:30,240 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:21:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:30,285 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-02 23:21:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:21:30,286 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-02 23:21:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:30,287 INFO L225 Difference]: With dead ends: 33 [2023-04-02 23:21:30,287 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 23:21:30,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:21:30,288 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:30,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:21:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 23:21:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-04-02 23:21:30,295 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) [2023-04-02 23:21:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-04-02 23:21:30,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2023-04-02 23:21:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:30,297 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-04-02 23:21:30,297 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:21:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-04-02 23:21:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 23:21:30,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:30,298 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:30,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:21:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:30,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:30,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 414092736, now seen corresponding path program 1 times [2023-04-02 23:21:30,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:30,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393889634] [2023-04-02 23:21:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:30,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:30,531 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:30,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331977787] [2023-04-02 23:21:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:30,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:30,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:30,541 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:30,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:21:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:30,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:21:30,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:30,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:31,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:31,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393889634] [2023-04-02 23:21:31,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:31,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331977787] [2023-04-02 23:21:31,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331977787] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:31,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121883430] [2023-04-02 23:21:31,057 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:21:31,057 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:31,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:31,064 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:31,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:31,125 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:31,362 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 23:21:31,370 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:31,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:31,388 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:31,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2121883430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:21:31,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:31,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [11, 7] total 29 [2023-04-02 23:21:31,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109514138] [2023-04-02 23:21:31,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:21:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:21:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-04-02 23:21:31,902 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), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 23:21:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:32,650 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-04-02 23:21:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 23:21:32,651 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), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-04-02 23:21:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:32,651 INFO L225 Difference]: With dead ends: 37 [2023-04-02 23:21:32,652 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 23:21:32,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 23:21:32,653 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:32,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:21:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 23:21:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 23:21:32,661 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) [2023-04-02 23:21:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-02 23:21:32,662 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2023-04-02 23:21:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:32,662 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-02 23:21:32,663 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), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 23:21:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-02 23:21:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:21:32,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:32,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:32,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:21:32,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:32,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:32,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:32,870 INFO L85 PathProgramCache]: Analyzing trace with hash 388362465, now seen corresponding path program 1 times [2023-04-02 23:21:32,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:32,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898271263] [2023-04-02 23:21:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:32,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:32,885 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:32,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720312570] [2023-04-02 23:21:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:32,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:32,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:32,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:32,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:21:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:32,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 23:21:32,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:32,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:33,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898271263] [2023-04-02 23:21:33,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720312570] [2023-04-02 23:21:33,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720312570] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928496460] [2023-04-02 23:21:33,034 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:21:33,034 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:33,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:33,035 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:33,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:33,067 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:35,297 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:21:35,301 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:35,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:35,309 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:35,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '833#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:21:35,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:21:35,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:35,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 23:21:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297686186] [2023-04-02 23:21:35,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:21:35,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:21:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:35,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:21:35,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:21:35,922 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:21:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:36,005 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-04-02 23:21:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:21:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2023-04-02 23:21:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:36,006 INFO L225 Difference]: With dead ends: 63 [2023-04-02 23:21:36,006 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 23:21:36,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:21:36,008 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:36,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 85 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:21:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 23:21:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-04-02 23:21:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 23:21:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-04-02 23:21:36,020 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 23 [2023-04-02 23:21:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:36,020 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-04-02 23:21:36,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:21:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-04-02 23:21:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:21:36,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:36,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:36,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:21:36,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:36,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:36,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash 390149925, now seen corresponding path program 1 times [2023-04-02 23:21:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:36,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979418691] [2023-04-02 23:21:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:36,252 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:36,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423153591] [2023-04-02 23:21:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:36,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:36,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:36,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:36,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:21:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:36,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 23:21:36,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:37,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:37,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979418691] [2023-04-02 23:21:37,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423153591] [2023-04-02 23:21:37,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423153591] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:37,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9902292] [2023-04-02 23:21:37,486 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:21:37,486 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:37,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:37,486 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:37,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:37,510 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:39,091 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 82 for LOIs [2023-04-02 23:21:39,213 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:39,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:39,225 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:40,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1170#(and (exists ((v_main_~y~0_BEFORE_CALL_40 Int) (v_main_~a~0_BEFORE_CALL_27 Int) (v_main_~q~0_BEFORE_CALL_29 Int) (v_main_~p~0_BEFORE_CALL_28 Int) (|v_old(~counter~0)_BEFORE_CALL_31| Int) (v_main_~b~0_BEFORE_CALL_28 Int) (v_main_~x~0_BEFORE_CALL_37 Int)) (and (not (= (+ v_main_~q~0_BEFORE_CALL_29 (* v_main_~a~0_BEFORE_CALL_27 v_main_~p~0_BEFORE_CALL_28 v_main_~b~0_BEFORE_CALL_28)) (* v_main_~y~0_BEFORE_CALL_40 v_main_~x~0_BEFORE_CALL_37))) (exists ((|v_main_#t~post6_22| Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (= v_main_~a~0_BEFORE_CALL_27 v_main_~x~0_BEFORE_CALL_37) (= |v_old(~counter~0)_BEFORE_CALL_31| 0) (= v_main_~y~0_BEFORE_CALL_40 v_main_~b~0_BEFORE_CALL_28) (<= 0 (+ v_main_~x~0_BEFORE_CALL_37 2147483648)) (<= v_main_~y~0_BEFORE_CALL_40 2147483647) (= |#NULL.offset| 0) (<= 1 v_main_~y~0_BEFORE_CALL_40) (= v_main_~q~0_BEFORE_CALL_29 0) (= ~counter~0 1) (<= v_main_~x~0_BEFORE_CALL_37 2147483647) (= |v_main_#t~post6_22| 0) (= v_main_~p~0_BEFORE_CALL_28 1) (= |#NULL.base| 0)) (and (<= v_main_~y~0_BEFORE_CALL_40 (+ |#StackHeapBarrier| 2147483646)) (<= 1 |v_main_#t~post6_22|) (<= 1 |#StackHeapBarrier|) (<= v_main_~x~0_BEFORE_CALL_37 (+ v_main_~y~0_BEFORE_CALL_40 2147483646)) (<= v_main_~x~0_BEFORE_CALL_37 (+ |#StackHeapBarrier| 2147483646)) (= |v_old(~counter~0)_BEFORE_CALL_31| 0) (<= 0 (+ v_main_~x~0_BEFORE_CALL_37 2147483648)) (<= 0 (+ 2147483647 v_main_~y~0_BEFORE_CALL_40 v_main_~x~0_BEFORE_CALL_37)) (<= v_main_~y~0_BEFORE_CALL_40 2147483647) (<= (+ v_main_~y~0_BEFORE_CALL_40 v_main_~x~0_BEFORE_CALL_37) 4294967294) (<= 2 (+ |v_main_#t~post6_22| v_main_~y~0_BEFORE_CALL_40)) (<= v_main_~x~0_BEFORE_CALL_37 (+ |v_main_#t~post6_22| 2147483646)) (<= 0 (+ 2147483647 |v_main_#t~post6_22| v_main_~x~0_BEFORE_CALL_37)) (<= v_main_~y~0_BEFORE_CALL_40 (+ |v_main_#t~post6_22| 2147483646)) (<= 2 (+ |v_main_#t~post6_22| |#StackHeapBarrier|)) (<= v_main_~y~0_BEFORE_CALL_40 (+ 4294967295 v_main_~x~0_BEFORE_CALL_37)) (= ~counter~0 (+ |v_main_#t~post6_22| 1)) (= |#NULL.offset| 0) (<= 1 v_main_~y~0_BEFORE_CALL_40) (<= v_main_~x~0_BEFORE_CALL_37 2147483647) (<= 0 (+ 2147483647 |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_37)) (<= 2 (+ v_main_~y~0_BEFORE_CALL_40 |#StackHeapBarrier|)) (= |#NULL.base| 0))) (< |v_main_#t~post6_22| 100))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:21:40,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:21:40,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:40,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2023-04-02 23:21:40,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824880825] [2023-04-02 23:21:40,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:21:40,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 23:21:40,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 23:21:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-04-02 23:21:40,139 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:21:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:40,518 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-04-02 23:21:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:21:40,518 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), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 23 [2023-04-02 23:21:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:40,519 INFO L225 Difference]: With dead ends: 65 [2023-04-02 23:21:40,519 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 23:21:40,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:21:40,521 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:40,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 114 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:21:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 23:21:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-04-02 23:21:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:21:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-04-02 23:21:40,531 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 23 [2023-04-02 23:21:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:40,532 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-04-02 23:21:40,532 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), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:21:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-04-02 23:21:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 23:21:40,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:40,533 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:40,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 23:21:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:40,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:40,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416277, now seen corresponding path program 1 times [2023-04-02 23:21:40,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:40,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735259714] [2023-04-02 23:21:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:40,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:40,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177328306] [2023-04-02 23:21:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:40,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:40,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:40,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:40,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:21:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:40,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 23:21:40,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:21:40,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:21:40,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:40,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735259714] [2023-04-02 23:21:40,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:40,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177328306] [2023-04-02 23:21:40,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177328306] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:40,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348168542] [2023-04-02 23:21:40,940 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:21:40,940 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:40,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:40,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:40,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:40,957 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:42,347 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:21:42,350 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:42,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:42,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:42,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1541#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:21:42,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:21:42,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:42,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-02 23:21:42,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144804385] [2023-04-02 23:21:42,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:21:42,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:21:42,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:21:42,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:21:42,976 INFO L87 Difference]: Start difference. First operand 51 states and 55 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 23:21:45,102 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 [0] [2023-04-02 23:21:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:45,228 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-04-02 23:21:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:21:45,229 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2023-04-02 23:21:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:45,231 INFO L225 Difference]: With dead ends: 58 [2023-04-02 23:21:45,231 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 23:21:45,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:21:45,233 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:45,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 119 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 23:21:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 23:21:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-04-02 23:21:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 23:21:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2023-04-02 23:21:45,245 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 29 [2023-04-02 23:21:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:45,245 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2023-04-02 23:21:45,245 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 23:21:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2023-04-02 23:21:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 23:21:45,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:45,246 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:45,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 23:21:45,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:45,453 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:45,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1888543631, now seen corresponding path program 1 times [2023-04-02 23:21:45,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:45,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307407437] [2023-04-02 23:21:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:45,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:45,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65616433] [2023-04-02 23:21:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:45,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:45,462 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:45,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:21:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:45,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 23:21:45,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:21:45,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:21:45,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:45,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307407437] [2023-04-02 23:21:45,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:45,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65616433] [2023-04-02 23:21:45,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65616433] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 23:21:45,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:21:45,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-04-02 23:21:45,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461677434] [2023-04-02 23:21:45,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:21:45,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:21:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:21:45,996 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:21:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:46,044 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2023-04-02 23:21:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:21:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-04-02 23:21:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:46,049 INFO L225 Difference]: With dead ends: 63 [2023-04-02 23:21:46,050 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 23:21:46,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-04-02 23:21:46,051 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:46,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 72 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:21:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 23:21:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-02 23:21:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:21:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2023-04-02 23:21:46,070 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 34 [2023-04-02 23:21:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:46,070 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2023-04-02 23:21:46,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:21:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2023-04-02 23:21:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 23:21:46,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:46,079 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:46,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 23:21:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 23:21:46,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:46,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1927977122, now seen corresponding path program 2 times [2023-04-02 23:21:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:46,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079571462] [2023-04-02 23:21:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:46,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:46,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:46,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449272619] [2023-04-02 23:21:46,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:21:46,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:46,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:46,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:46,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 23:21:46,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 23:21:46,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:21:46,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 23:21:46,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:46,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:21:46,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:46,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079571462] [2023-04-02 23:21:46,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:46,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449272619] [2023-04-02 23:21:46,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449272619] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:46,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1014551726] [2023-04-02 23:21:46,575 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:21:46,575 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:46,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:46,576 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:46,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:46,599 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:47,917 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:21:47,919 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:47,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:47,927 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:48,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2393#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:21:48,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:21:48,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:48,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 23:21:48,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18452287] [2023-04-02 23:21:48,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:21:48,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:21:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:21:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:21:48,490 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 23:21:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:48,673 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2023-04-02 23:21:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 23:21:48,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 47 [2023-04-02 23:21:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:48,675 INFO L225 Difference]: With dead ends: 107 [2023-04-02 23:21:48,675 INFO L226 Difference]: Without dead ends: 99 [2023-04-02 23:21:48,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 23:21:48,676 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:48,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 105 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:21:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-02 23:21:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-04-02 23:21:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 71 states have internal predecessors, (72), 15 states have call successors, (15), 14 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 23:21:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2023-04-02 23:21:48,690 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 47 [2023-04-02 23:21:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:48,690 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2023-04-02 23:21:48,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 23:21:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2023-04-02 23:21:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-02 23:21:48,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:48,692 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:48,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 23:21:48,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:48,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:48,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:48,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1689514204, now seen corresponding path program 3 times [2023-04-02 23:21:48,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:48,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296123629] [2023-04-02 23:21:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:48,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:48,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:48,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862370723] [2023-04-02 23:21:48,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:21:48,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:48,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:48,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:48,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 23:21:50,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:21:50,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:21:50,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 23:21:50,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:50,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 23:21:50,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296123629] [2023-04-02 23:21:50,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862370723] [2023-04-02 23:21:50,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862370723] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270823660] [2023-04-02 23:21:50,829 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:21:50,829 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:50,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:50,829 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:50,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:50,844 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:51,983 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:21:51,986 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:51,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:51,991 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:52,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3309#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:21:52,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:21:52,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:52,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 23:21:52,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21948904] [2023-04-02 23:21:52,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:21:52,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 23:21:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 23:21:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 23:21:52,574 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2023-04-02 23:21:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:53,074 INFO L93 Difference]: Finished difference Result 203 states and 216 transitions. [2023-04-02 23:21:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-02 23:21:53,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 95 [2023-04-02 23:21:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:53,078 INFO L225 Difference]: With dead ends: 203 [2023-04-02 23:21:53,078 INFO L226 Difference]: Without dead ends: 195 [2023-04-02 23:21:53,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1001, Invalid=2905, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 23:21:53,080 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:53,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 131 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:21:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-04-02 23:21:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-04-02 23:21:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 143 states have internal predecessors, (144), 27 states have call successors, (27), 26 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-02 23:21:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2023-04-02 23:21:53,115 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 95 [2023-04-02 23:21:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:53,116 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2023-04-02 23:21:53,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2023-04-02 23:21:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2023-04-02 23:21:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-04-02 23:21:53,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:53,119 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:53,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 23:21:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 23:21:53,320 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:53,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash -672425944, now seen corresponding path program 4 times [2023-04-02 23:21:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:53,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831400324] [2023-04-02 23:21:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:53,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:53,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:53,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179777248] [2023-04-02 23:21:53,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:21:53,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:53,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:53,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 23:21:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:53,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 23:21:53,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:53,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-04-02 23:21:54,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831400324] [2023-04-02 23:21:54,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179777248] [2023-04-02 23:21:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179777248] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446255762] [2023-04-02 23:21:54,642 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:21:54,642 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:54,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:54,642 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:54,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:54,658 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:55,814 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:21:55,816 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:55,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:55,822 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:56,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5113#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:21:56,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:21:56,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:56,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-02 23:21:56,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080109854] [2023-04-02 23:21:56,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:21:56,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 23:21:56,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 23:21:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1506, Invalid=2784, Unknown=0, NotChecked=0, Total=4290 [2023-04-02 23:21:56,550 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 50 states, 50 states have (on average 4.32) internal successors, (216), 50 states have internal predecessors, (216), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2023-04-02 23:21:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:58,031 INFO L93 Difference]: Finished difference Result 395 states and 420 transitions. [2023-04-02 23:21:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-04-02 23:21:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.32) internal successors, (216), 50 states have internal predecessors, (216), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 191 [2023-04-02 23:21:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:58,035 INFO L225 Difference]: With dead ends: 395 [2023-04-02 23:21:58,035 INFO L226 Difference]: Without dead ends: 387 [2023-04-02 23:21:58,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3151 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3689, Invalid=8521, Unknown=0, NotChecked=0, Total=12210 [2023-04-02 23:21:58,039 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 206 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:58,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 231 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:21:58,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-04-02 23:21:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2023-04-02 23:21:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 286 states have (on average 1.006993006993007) internal successors, (288), 287 states have internal predecessors, (288), 51 states have call successors, (51), 50 states have call predecessors, (51), 49 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-04-02 23:21:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 388 transitions. [2023-04-02 23:21:58,073 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 388 transitions. Word has length 191 [2023-04-02 23:21:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:58,074 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 388 transitions. [2023-04-02 23:21:58,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.32) internal successors, (216), 50 states have internal predecessors, (216), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2023-04-02 23:21:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 388 transitions. [2023-04-02 23:21:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-04-02 23:21:58,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:58,079 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:58,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 23:21:58,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 23:21:58,288 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:58,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash 746396208, now seen corresponding path program 5 times [2023-04-02 23:21:58,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:58,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991436785] [2023-04-02 23:21:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:58,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:58,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859889942] [2023-04-02 23:21:58,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:21:58,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:58,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:58,318 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:21:58,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process