/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/egcd3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:55:33,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:55:33,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:55:33,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:55:33,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:55:33,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:55:33,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:55:34,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:55:34,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:55:34,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:55:34,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:55:34,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:55:34,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:55:34,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:55:34,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:55:34,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:55:34,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:55:34,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:55:34,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:55:34,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:55:34,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:55:34,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:55:34,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:55:34,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:55:34,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:55:34,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:55:34,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:55:34,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:55:34,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:55:34,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:55:34,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:55:34,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:55:34,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:55:34,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:55:34,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:55:34,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:55:34,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:55:34,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:55:34,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:55:34,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:55:34,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:55:34,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:55:34,056 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:55:34,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:55:34,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:55:34,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:55:34,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:55:34,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:55:34,058 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:55:34,058 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:55:34,058 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:55:34,058 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:55:34,059 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:55:34,059 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:55:34,059 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:55:34,059 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:55:34,059 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:55:34,059 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:55:34,059 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:55:34,059 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:55:34,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:55:34,060 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:55:34,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:55:34,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:55:34,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:55:34,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:55:34,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:55:34,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:55:34,061 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:55:34,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:55:34,061 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:55:34,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:55:34,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:55:34,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:55:34,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:55:34,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:55:34,062 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:55:34,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:55:34,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:55:34,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:55:34,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:55:34,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:55:34,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:55:34,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:55:34,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:55:34,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:55:34,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:55:34,239 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:55:34,240 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:55:34,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2023-04-02 22:55:35,253 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:55:35,448 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:55:35,449 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2023-04-02 22:55:35,453 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93b720e83/592f787ffb5d439d976f855617548c43/FLAG32f010ca1 [2023-04-02 22:55:35,871 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93b720e83/592f787ffb5d439d976f855617548c43 [2023-04-02 22:55:35,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:55:35,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:55:35,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:55:35,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:55:35,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:55:35,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:55:35" (1/1) ... [2023-04-02 22:55:35,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a6d276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:35, skipping insertion in model container [2023-04-02 22:55:35,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:55:35" (1/1) ... [2023-04-02 22:55:35,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:55:35,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:55:36,016 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/egcd3-ll_unwindbound20.c[490,503] [2023-04-02 22:55:36,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:55:36,050 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:55:36,059 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/egcd3-ll_unwindbound20.c[490,503] [2023-04-02 22:55:36,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:55:36,086 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:55:36,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36 WrapperNode [2023-04-02 22:55:36,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:55:36,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:55:36,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:55:36,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:55:36,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,122 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:55:36,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:55:36,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:55:36,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:55:36,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (1/1) ... [2023-04-02 22:55:36,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:55:36,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:36,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:55:36,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:55:36,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:55:36,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:55:36,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:55:36,232 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:55:36,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:55:36,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:55:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:55:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:55:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:55:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:55:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 22:55:36,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:55:36,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:55:36,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:55:36,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:55:36,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:55:36,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:55:36,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:55:36,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:55:36,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:55:36,299 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:55:36,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:55:36,491 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:55:36,503 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:55:36,503 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 22:55:36,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:55:36 BoogieIcfgContainer [2023-04-02 22:55:36,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:55:36,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:55:36,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:55:36,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:55:36,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:55:35" (1/3) ... [2023-04-02 22:55:36,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b314bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:55:36, skipping insertion in model container [2023-04-02 22:55:36,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:36" (2/3) ... [2023-04-02 22:55:36,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b314bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:55:36, skipping insertion in model container [2023-04-02 22:55:36,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:55:36" (3/3) ... [2023-04-02 22:55:36,524 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2023-04-02 22:55:36,550 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:55:36,550 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:55:36,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:55:36,597 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;@9a63e1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:55:36,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:55:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 22:55:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 22:55:36,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:36,608 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:36,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:36,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:36,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1884191244, now seen corresponding path program 1 times [2023-04-02 22:55:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039624623] [2023-04-02 22:55:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:36,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:36,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039624623] [2023-04-02 22:55:36,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 22:55:36,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68765241] [2023-04-02 22:55:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:36,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:36,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:36,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:55:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:36,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:55:36,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:36,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:36,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68765241] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:36,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:36,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:55:36,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371709812] [2023-04-02 22:55:36,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:36,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:55:36,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:55:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:55:36,861 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:55:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:36,881 INFO L93 Difference]: Finished difference Result 62 states and 94 transitions. [2023-04-02 22:55:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:55:36,883 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-04-02 22:55:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:36,888 INFO L225 Difference]: With dead ends: 62 [2023-04-02 22:55:36,888 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 22:55:36,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:55:36,892 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:36,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:55:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 22:55:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 22:55:36,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:55:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-04-02 22:55:36,920 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 17 [2023-04-02 22:55:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:36,921 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-04-02 22:55:36,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:55:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-04-02 22:55:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:55:36,922 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:36,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:36,931 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 22:55:37,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 22:55:37,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:37,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash 952486133, now seen corresponding path program 1 times [2023-04-02 22:55:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:37,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131018121] [2023-04-02 22:55:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:37,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:37,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:37,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226980093] [2023-04-02 22:55:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:37,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:37,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:37,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:37,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:55:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:37,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:55:37,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:37,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:37,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:37,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131018121] [2023-04-02 22:55:37,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:37,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226980093] [2023-04-02 22:55:37,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226980093] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:37,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:37,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 22:55:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193926928] [2023-04-02 22:55:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:37,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:55:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:55:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:55:37,282 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:37,298 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-02 22:55:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 22:55:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2023-04-02 22:55:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:37,299 INFO L225 Difference]: With dead ends: 41 [2023-04-02 22:55:37,299 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 22:55:37,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:55:37,300 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:37,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:55:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 22:55:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 22:55:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:55:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-04-02 22:55:37,306 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 18 [2023-04-02 22:55:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:37,306 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-04-02 22:55:37,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-04-02 22:55:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 22:55:37,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:37,307 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:37,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:37,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 22:55:37,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:37,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -552718471, now seen corresponding path program 1 times [2023-04-02 22:55:37,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:37,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513499849] [2023-04-02 22:55:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:37,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:37,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:37,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061845293] [2023-04-02 22:55:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:37,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:37,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:37,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:55:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:37,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:55:37,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:55:37,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:37,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513499849] [2023-04-02 22:55:37,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061845293] [2023-04-02 22:55:37,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061845293] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:37,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:37,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:55:37,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426788151] [2023-04-02 22:55:37,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:37,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:55:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:55:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:55:37,643 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:55:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:37,721 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2023-04-02 22:55:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:55:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-02 22:55:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:37,722 INFO L225 Difference]: With dead ends: 54 [2023-04-02 22:55:37,722 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 22:55:37,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 22:55:37,723 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:37,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:55:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 22:55:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-04-02 22:55:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:55:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-04-02 22:55:37,744 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 19 [2023-04-02 22:55:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:37,744 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-04-02 22:55:37,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:55:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-04-02 22:55:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:55:37,746 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:37,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:37,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:37,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:37,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:37,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1491876193, now seen corresponding path program 1 times [2023-04-02 22:55:37,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:37,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998618066] [2023-04-02 22:55:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:37,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:37,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249119679] [2023-04-02 22:55:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:37,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:37,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:37,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:55:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:38,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:55:38,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:38,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:38,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998618066] [2023-04-02 22:55:38,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:38,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249119679] [2023-04-02 22:55:38,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249119679] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:38,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:38,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:55:38,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088867491] [2023-04-02 22:55:38,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:38,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:55:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:55:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:55:38,048 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:38,064 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2023-04-02 22:55:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:55:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-02 22:55:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:38,065 INFO L225 Difference]: With dead ends: 59 [2023-04-02 22:55:38,065 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 22:55:38,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:55:38,067 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:38,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:55:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 22:55:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-02 22:55:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:55:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-04-02 22:55:38,072 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 24 [2023-04-02 22:55:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:38,072 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-04-02 22:55:38,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-04-02 22:55:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:55:38,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:38,073 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, 1, 1, 1] [2023-04-02 22:55:38,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:38,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:38,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:38,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash -917044466, now seen corresponding path program 1 times [2023-04-02 22:55:38,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:38,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999508657] [2023-04-02 22:55:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:38,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:38,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:38,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675301892] [2023-04-02 22:55:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:38,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:38,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:38,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:38,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:55:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:38,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 22:55:38,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:55:38,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:38,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:38,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999508657] [2023-04-02 22:55:38,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:38,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675301892] [2023-04-02 22:55:38,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675301892] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:38,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:38,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 22:55:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754912633] [2023-04-02 22:55:38,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:38,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 22:55:38,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 22:55:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 22:55:38,480 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:38,541 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2023-04-02 22:55:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:55:38,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-02 22:55:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:38,542 INFO L225 Difference]: With dead ends: 55 [2023-04-02 22:55:38,542 INFO L226 Difference]: Without dead ends: 53 [2023-04-02 22:55:38,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-02 22:55:38,543 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:38,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 149 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:55:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-02 22:55:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-04-02 22:55:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 22:55:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2023-04-02 22:55:38,550 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 24 [2023-04-02 22:55:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:38,550 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2023-04-02 22:55:38,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2023-04-02 22:55:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 22:55:38,551 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:38,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:38,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:38,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:38,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:38,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:38,756 INFO L85 PathProgramCache]: Analyzing trace with hash -575541792, now seen corresponding path program 1 times [2023-04-02 22:55:38,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:38,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322845622] [2023-04-02 22:55:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:38,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:38,766 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:38,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637154609] [2023-04-02 22:55:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:38,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:38,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:38,769 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:38,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 22:55:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:38,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:55:38,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:38,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:55:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:38,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322845622] [2023-04-02 22:55:38,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637154609] [2023-04-02 22:55:38,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637154609] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:55:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054930754] [2023-04-02 22:55:38,936 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 22:55:38,936 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:55:38,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:55:38,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:55:38,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:55:38,982 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:55:41,506 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2023-04-02 22:55:41,616 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:55:41,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:55:41,621 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:55:45,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1190#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 21 ~counter~0) (= |#NULL.offset| 0) (<= ~counter~0 21) (= |#NULL.base| 0))' at error location [2023-04-02 22:55:45,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:55:45,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:55:45,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-02 22:55:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688185107] [2023-04-02 22:55:45,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:55:45,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 22:55:45,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 22:55:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2023-04-02 22:55:45,644 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 22:55:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:45,819 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2023-04-02 22:55:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 22:55:45,822 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-04-02 22:55:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:45,832 INFO L225 Difference]: With dead ends: 148 [2023-04-02 22:55:45,832 INFO L226 Difference]: Without dead ends: 141 [2023-04-02 22:55:45,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2023-04-02 22:55:45,835 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 83 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:45,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 218 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:55:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-02 22:55:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2023-04-02 22:55:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 69 states have internal predecessors, (90), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-02 22:55:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2023-04-02 22:55:45,858 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 25 [2023-04-02 22:55:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:45,858 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2023-04-02 22:55:45,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 22:55:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2023-04-02 22:55:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 22:55:45,858 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:45,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:45,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:46,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:46,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:46,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -676943890, now seen corresponding path program 1 times [2023-04-02 22:55:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:46,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809948938] [2023-04-02 22:55:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:46,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:46,079 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:46,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850958842] [2023-04-02 22:55:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:46,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:46,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:46,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:46,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 22:55:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:46,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:55:46,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:55:46,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:55:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:55:46,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:46,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809948938] [2023-04-02 22:55:46,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:46,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850958842] [2023-04-02 22:55:46,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850958842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:55:46,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791258162] [2023-04-02 22:55:46,197 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 22:55:46,197 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:55:46,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:55:46,200 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:55:46,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:55:46,218 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:55:48,022 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:55:48,024 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:55:48,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:55:48,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:55:52,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1730#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:55:52,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:55:52,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:55:52,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-04-02 22:55:52,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923105979] [2023-04-02 22:55:52,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:55:52,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 22:55:52,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:52,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 22:55:52,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-04-02 22:55:52,464 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:52,669 INFO L93 Difference]: Finished difference Result 184 states and 262 transitions. [2023-04-02 22:55:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 22:55:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-04-02 22:55:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:52,671 INFO L225 Difference]: With dead ends: 184 [2023-04-02 22:55:52,671 INFO L226 Difference]: Without dead ends: 172 [2023-04-02 22:55:52,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2023-04-02 22:55:52,672 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 120 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:52,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 195 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:55:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-04-02 22:55:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2023-04-02 22:55:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 96 states have internal predecessors, (129), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-02 22:55:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 177 transitions. [2023-04-02 22:55:52,701 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 177 transitions. Word has length 26 [2023-04-02 22:55:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:52,701 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 177 transitions. [2023-04-02 22:55:52,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 177 transitions. [2023-04-02 22:55:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 22:55:52,702 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:52,702 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:52,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 22:55:52,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:52,903 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:52,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:52,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1039050843, now seen corresponding path program 1 times [2023-04-02 22:55:52,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:52,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262564979] [2023-04-02 22:55:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:52,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:52,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:52,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674209980] [2023-04-02 22:55:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:52,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:52,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:52,922 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:52,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 22:55:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:52,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:55:52,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:53,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:55:53,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:53,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262564979] [2023-04-02 22:55:53,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:53,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674209980] [2023-04-02 22:55:53,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674209980] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:55:53,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984958231] [2023-04-02 22:55:53,066 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-02 22:55:53,066 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:55:53,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:55:53,066 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:55:53,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:55:53,082 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:55:53,191 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-02 22:55:53,194 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:55:53,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:55:53,199 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:55:53,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1984958231] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:53,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:55:53,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7] total 26 [2023-04-02 22:55:53,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672155732] [2023-04-02 22:55:53,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 22:55:53,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 22:55:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2023-04-02 22:55:53,831 INFO L87 Difference]: Start difference. First operand 129 states and 177 transitions. Second operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 5 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 22:55:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:54,451 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2023-04-02 22:55:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 22:55:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-04-02 22:55:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:54,452 INFO L225 Difference]: With dead ends: 174 [2023-04-02 22:55:54,453 INFO L226 Difference]: Without dead ends: 130 [2023-04-02 22:55:54,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 22:55:54,454 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:54,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:55:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-04-02 22:55:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2023-04-02 22:55:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 96 states have internal predecessors, (127), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-02 22:55:54,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 175 transitions. [2023-04-02 22:55:54,464 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 175 transitions. Word has length 29 [2023-04-02 22:55:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:54,465 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 175 transitions. [2023-04-02 22:55:54,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 5 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 22:55:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 175 transitions. [2023-04-02 22:55:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 22:55:54,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:54,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:54,470 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 22:55:54,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 22:55:54,670 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:54,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash -51344455, now seen corresponding path program 1 times [2023-04-02 22:55:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:54,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016124460] [2023-04-02 22:55:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:54,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:54,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101624284] [2023-04-02 22:55:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:54,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:54,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:54,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:54,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 22:55:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:54,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 22:55:54,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:55:54,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:55:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:54,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:54,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016124460] [2023-04-02 22:55:54,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:54,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101624284] [2023-04-02 22:55:54,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101624284] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:55:54,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [42485347] [2023-04-02 22:55:54,958 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 22:55:54,958 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:55:54,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:55:54,959 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:55:54,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:55:54,971 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:55:56,701 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 118 for LOIs [2023-04-02 22:55:56,758 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:55:56,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:55:56,761 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:56:01,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2984#(and (<= 1 |#StackHeapBarrier|) (< ~counter~0 21) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 3 ~counter~0) (= |#NULL.base| 0))' at error location [2023-04-02 22:56:01,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:56:01,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:56:01,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-04-02 22:56:01,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492180796] [2023-04-02 22:56:01,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:56:01,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 22:56:01,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 22:56:01,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:56:01,916 INFO L87 Difference]: Start difference. First operand 129 states and 175 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 22:56:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:03,664 INFO L93 Difference]: Finished difference Result 180 states and 248 transitions. [2023-04-02 22:56:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 22:56:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-04-02 22:56:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:03,666 INFO L225 Difference]: With dead ends: 180 [2023-04-02 22:56:03,666 INFO L226 Difference]: Without dead ends: 178 [2023-04-02 22:56:03,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 22:56:03,667 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 85 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:03,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 297 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 22:56:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-04-02 22:56:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 167. [2023-04-02 22:56:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 123 states have internal predecessors, (164), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-02 22:56:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 228 transitions. [2023-04-02 22:56:03,695 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 228 transitions. Word has length 31 [2023-04-02 22:56:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:03,696 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 228 transitions. [2023-04-02 22:56:03,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 22:56:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 228 transitions. [2023-04-02 22:56:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 22:56:03,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:03,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:03,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-02 22:56:03,904 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 22:56:03,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:03,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash 486113754, now seen corresponding path program 1 times [2023-04-02 22:56:03,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:03,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916792742] [2023-04-02 22:56:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:03,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:03,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:03,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065167720] [2023-04-02 22:56:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:03,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:03,916 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 22:56:03,940 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 22:56:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:56:03,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 22:56:03,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:56:04,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:56:04,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:04,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916792742] [2023-04-02 22:56:04,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:04,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065167720] [2023-04-02 22:56:04,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065167720] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:56:04,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546605473] [2023-04-02 22:56:04,142 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-02 22:56:04,142 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:56:04,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:56:04,142 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:56:04,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:56:04,154 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:56:06,439 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 22:56:06,442 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:56:06,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:56:06,448 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:56:12,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3638#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20) (= |#NULL.offset| 0) (<= 3 ~counter~0) (= |#NULL.base| 0))' at error location [2023-04-02 22:56:12,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:56:12,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:56:12,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-02 22:56:12,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571044533] [2023-04-02 22:56:12,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 22:56:12,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 22:56:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:12,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 22:56:12,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:56:12,289 INFO L87 Difference]: Start difference. First operand 167 states and 228 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 22:56:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:12,447 INFO L93 Difference]: Finished difference Result 190 states and 255 transitions. [2023-04-02 22:56:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 22:56:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-04-02 22:56:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:12,451 INFO L225 Difference]: With dead ends: 190 [2023-04-02 22:56:12,451 INFO L226 Difference]: Without dead ends: 188 [2023-04-02 22:56:12,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 22:56:12,452 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:12,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 206 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:56:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-04-02 22:56:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-04-02 22:56:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 134 states have (on average 1.328358208955224) internal successors, (178), 135 states have internal predecessors, (178), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-04-02 22:56:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 250 transitions. [2023-04-02 22:56:12,495 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 250 transitions. Word has length 36 [2023-04-02 22:56:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:12,495 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 250 transitions. [2023-04-02 22:56:12,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 22:56:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 250 transitions. [2023-04-02 22:56:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 22:56:12,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:12,499 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:12,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-02 22:56:12,704 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 22:56:12,704 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:12,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1371325752, now seen corresponding path program 1 times [2023-04-02 22:56:12,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:12,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780473420] [2023-04-02 22:56:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:12,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:12,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:12,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729121500] [2023-04-02 22:56:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:12,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:12,720 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 22:56:12,721 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 22:56:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:56:12,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 22:56:12,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 22:56:12,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:56:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 22:56:12,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780473420] [2023-04-02 22:56:12,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729121500] [2023-04-02 22:56:12,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729121500] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:56:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287730421] [2023-04-02 22:56:12,857 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 22:56:12,857 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:56:12,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:56:12,857 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:56:12,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:56:12,872 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:56:17,278 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 119 for LOIs [2023-04-02 22:56:17,340 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:56:17,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:56:17,343 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:56:23,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4431#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 21 ~counter~0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:56:23,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:56:23,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:56:23,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 22:56:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991123944] [2023-04-02 22:56:23,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:56:23,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:56:23,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:56:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-04-02 22:56:23,756 INFO L87 Difference]: Start difference. First operand 186 states and 250 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 22:56:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:23,942 INFO L93 Difference]: Finished difference Result 478 states and 661 transitions. [2023-04-02 22:56:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:56:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2023-04-02 22:56:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:23,947 INFO L225 Difference]: With dead ends: 478 [2023-04-02 22:56:23,947 INFO L226 Difference]: Without dead ends: 402 [2023-04-02 22:56:23,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 22:56:23,950 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 124 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:23,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 283 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:56:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-04-02 22:56:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 372. [2023-04-02 22:56:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 261 states have (on average 1.3103448275862069) internal successors, (342), 265 states have internal predecessors, (342), 84 states have call successors, (84), 27 states have call predecessors, (84), 26 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-04-02 22:56:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 505 transitions. [2023-04-02 22:56:23,991 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 505 transitions. Word has length 37 [2023-04-02 22:56:23,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:23,991 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 505 transitions. [2023-04-02 22:56:23,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 22:56:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 505 transitions. [2023-04-02 22:56:23,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 22:56:23,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:23,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:24,002 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 22:56:24,200 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 22:56:24,200 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:24,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:24,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1047985326, now seen corresponding path program 2 times [2023-04-02 22:56:24,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:24,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179928819] [2023-04-02 22:56:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:24,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:24,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335790059] [2023-04-02 22:56:24,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:56:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:24,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:24,209 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 22:56:24,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 22:56:24,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:56:24,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:56:24,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:56:24,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:56:24,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:56:24,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179928819] [2023-04-02 22:56:24,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335790059] [2023-04-02 22:56:24,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335790059] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:56:24,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:56:24,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:56:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155288935] [2023-04-02 22:56:24,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:56:24,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:56:24,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:56:24,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:56:24,263 INFO L87 Difference]: Start difference. First operand 372 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:56:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:24,358 INFO L93 Difference]: Finished difference Result 539 states and 766 transitions. [2023-04-02 22:56:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:56:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2023-04-02 22:56:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:24,361 INFO L225 Difference]: With dead ends: 539 [2023-04-02 22:56:24,361 INFO L226 Difference]: Without dead ends: 454 [2023-04-02 22:56:24,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:56:24,361 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 30 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:24,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 145 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:56:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-02 22:56:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 372. [2023-04-02 22:56:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 265 states have (on average 1.3169811320754716) internal successors, (349), 269 states have internal predecessors, (349), 80 states have call successors, (80), 27 states have call predecessors, (80), 26 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-04-02 22:56:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 504 transitions. [2023-04-02 22:56:24,393 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 504 transitions. Word has length 38 [2023-04-02 22:56:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:24,393 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 504 transitions. [2023-04-02 22:56:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:56:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 504 transitions. [2023-04-02 22:56:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 22:56:24,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:24,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:24,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-02 22:56:24,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 22:56:24,598 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:24,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash -989802546, now seen corresponding path program 1 times [2023-04-02 22:56:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:24,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094306642] [2023-04-02 22:56:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:24,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:24,605 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:24,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659554517] [2023-04-02 22:56:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:24,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:24,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:24,606 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:56:24,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 22:56:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:56:24,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 22:56:24,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:56:24,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:56:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:56:24,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:24,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094306642] [2023-04-02 22:56:24,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:24,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659554517] [2023-04-02 22:56:24,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659554517] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:56:24,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [642509483] [2023-04-02 22:56:24,734 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-02 22:56:24,734 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:56:24,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:56:24,735 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:56:24,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:56:24,748 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:56:34,221 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 22:56:34,224 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:56:34,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:56:34,227 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:56:34,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7358#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 21 ~counter~0) (<= ~counter~0 21))' at error location [2023-04-02 22:56:34,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:56:34,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:56:34,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 22:56:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133833908] [2023-04-02 22:56:34,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:56:34,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 22:56:34,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 22:56:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 22:56:34,618 INFO L87 Difference]: Start difference. First operand 372 states and 504 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 22:56:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:34,851 INFO L93 Difference]: Finished difference Result 785 states and 1067 transitions. [2023-04-02 22:56:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 22:56:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2023-04-02 22:56:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:34,853 INFO L225 Difference]: With dead ends: 785 [2023-04-02 22:56:34,853 INFO L226 Difference]: Without dead ends: 570 [2023-04-02 22:56:34,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 22:56:34,855 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 186 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:34,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 290 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:56:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-04-02 22:56:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 533. [2023-04-02 22:56:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 380 states have (on average 1.2815789473684212) internal successors, (487), 386 states have internal predecessors, (487), 118 states have call successors, (118), 35 states have call predecessors, (118), 34 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-04-02 22:56:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 716 transitions. [2023-04-02 22:56:34,899 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 716 transitions. Word has length 38 [2023-04-02 22:56:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:34,899 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 716 transitions. [2023-04-02 22:56:34,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 22:56:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 716 transitions. [2023-04-02 22:56:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 22:56:34,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:34,900 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:34,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 22:56:35,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 22:56:35,105 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:35,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1031319527, now seen corresponding path program 1 times [2023-04-02 22:56:35,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:35,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707179736] [2023-04-02 22:56:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:35,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:35,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:35,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678751519] [2023-04-02 22:56:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:35,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:35,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:35,116 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:56:35,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 22:56:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:56:35,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 22:56:35,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 22:56:35,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:56:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 22:56:35,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707179736] [2023-04-02 22:56:35,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678751519] [2023-04-02 22:56:35,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678751519] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 22:56:35,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:56:35,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-04-02 22:56:35,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493766579] [2023-04-02 22:56:35,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:56:35,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 22:56:35,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:35,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 22:56:35,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 22:56:35,275 INFO L87 Difference]: Start difference. First operand 533 states and 716 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 22:56:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:35,373 INFO L93 Difference]: Finished difference Result 667 states and 893 transitions. [2023-04-02 22:56:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:56:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-04-02 22:56:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:35,376 INFO L225 Difference]: With dead ends: 667 [2023-04-02 22:56:35,376 INFO L226 Difference]: Without dead ends: 665 [2023-04-02 22:56:35,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 22:56:35,377 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:35,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 114 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:56:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-04-02 22:56:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 650. [2023-04-02 22:56:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 453 states have (on average 1.2759381898454747) internal successors, (578), 459 states have internal predecessors, (578), 150 states have call successors, (150), 47 states have call predecessors, (150), 46 states have return successors, (143), 143 states have call predecessors, (143), 143 states have call successors, (143) [2023-04-02 22:56:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 871 transitions. [2023-04-02 22:56:35,433 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 871 transitions. Word has length 41 [2023-04-02 22:56:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:35,433 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 871 transitions. [2023-04-02 22:56:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 22:56:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 871 transitions. [2023-04-02 22:56:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 22:56:35,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:35,434 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:35,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 22:56:35,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:35,640 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:35,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:35,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2131273978, now seen corresponding path program 1 times [2023-04-02 22:56:35,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:35,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551909317] [2023-04-02 22:56:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:35,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:35,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:35,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187498763] [2023-04-02 22:56:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:35,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:35,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:35,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:56:35,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 22:56:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:56:35,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 22:56:35,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 22:56:35,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:56:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 22:56:36,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551909317] [2023-04-02 22:56:36,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187498763] [2023-04-02 22:56:36,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187498763] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 22:56:36,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:56:36,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 15 [2023-04-02 22:56:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686960920] [2023-04-02 22:56:36,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:56:36,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:56:36,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:56:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-04-02 22:56:36,253 INFO L87 Difference]: Start difference. First operand 650 states and 871 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 22:56:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:36,341 INFO L93 Difference]: Finished difference Result 680 states and 900 transitions. [2023-04-02 22:56:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:56:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2023-04-02 22:56:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:36,343 INFO L225 Difference]: With dead ends: 680 [2023-04-02 22:56:36,343 INFO L226 Difference]: Without dead ends: 678 [2023-04-02 22:56:36,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-02 22:56:36,345 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:36,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:56:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-04-02 22:56:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 674. [2023-04-02 22:56:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 471 states have (on average 1.2632696390658174) internal successors, (595), 477 states have internal predecessors, (595), 150 states have call successors, (150), 53 states have call predecessors, (150), 52 states have return successors, (143), 143 states have call predecessors, (143), 143 states have call successors, (143) [2023-04-02 22:56:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 888 transitions. [2023-04-02 22:56:36,406 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 888 transitions. Word has length 46 [2023-04-02 22:56:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:36,406 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 888 transitions. [2023-04-02 22:56:36,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 22:56:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 888 transitions. [2023-04-02 22:56:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 22:56:36,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:36,407 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:36,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-02 22:56:36,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 22:56:36,612 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:36,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 724937013, now seen corresponding path program 1 times [2023-04-02 22:56:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:36,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757943711] [2023-04-02 22:56:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:36,621 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280002530] [2023-04-02 22:56:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:36,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:36,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:56:36,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 22:56:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:56:36,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-02 22:56:36,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 22:56:37,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:56:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 22:56:37,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:37,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757943711] [2023-04-02 22:56:37,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280002530] [2023-04-02 22:56:37,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280002530] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:56:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253994342] [2023-04-02 22:56:37,679 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-04-02 22:56:37,679 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:56:37,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:56:37,679 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:56:37,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:56:37,695 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:56:52,002 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:56:52,004 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:56:52,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:56:52,007 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:56:56,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14021#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:56:56,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:56:56,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:56:56,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2023-04-02 22:56:56,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658792177] [2023-04-02 22:56:56,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:56:56,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 22:56:56,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:56,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 22:56:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1896, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 22:56:56,224 INFO L87 Difference]: Start difference. First operand 674 states and 888 transitions. Second operand has 25 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-02 22:57:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:57:04,700 INFO L93 Difference]: Finished difference Result 1248 states and 1667 transitions. [2023-04-02 22:57:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 22:57:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 53 [2023-04-02 22:57:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:57:04,705 INFO L225 Difference]: With dead ends: 1248 [2023-04-02 22:57:04,705 INFO L226 Difference]: Without dead ends: 969 [2023-04-02 22:57:04,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2023-04-02 22:57:04,707 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 274 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:57:04,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 464 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-02 22:57:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2023-04-02 22:57:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 825. [2023-04-02 22:57:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 591 states have (on average 1.260575296108291) internal successors, (745), 595 states have internal predecessors, (745), 172 states have call successors, (172), 62 states have call predecessors, (172), 61 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2023-04-02 22:57:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1084 transitions. [2023-04-02 22:57:04,880 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1084 transitions. Word has length 53 [2023-04-02 22:57:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:57:04,881 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 1084 transitions. [2023-04-02 22:57:04,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-02 22:57:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1084 transitions. [2023-04-02 22:57:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 22:57:04,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:57:04,882 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:57:04,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 22:57:05,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 22:57:05,087 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:57:05,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:57:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1191530980, now seen corresponding path program 1 times [2023-04-02 22:57:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:57:05,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560201678] [2023-04-02 22:57:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:57:05,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:57:05,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:57:05,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124440258] [2023-04-02 22:57:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:57:05,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:57:05,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:57:05,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:57:05,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 22:57:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:57:05,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:57:05,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:57:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 22:57:05,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:57:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 22:57:05,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:57:05,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560201678] [2023-04-02 22:57:05,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:57:05,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124440258] [2023-04-02 22:57:05,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124440258] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:57:05,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374540407] [2023-04-02 22:57:05,336 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-04-02 22:57:05,336 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:57:05,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:57:05,336 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:57:05,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:57:05,350 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:57:14,231 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:57:14,233 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:57:14,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:57:14,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:57:17,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17456#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:57:17,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:57:17,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:57:17,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-04-02 22:57:17,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640091839] [2023-04-02 22:57:17,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:57:17,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 22:57:17,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:57:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 22:57:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 22:57:17,281 INFO L87 Difference]: Start difference. First operand 825 states and 1084 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-02 22:57:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:57:18,059 INFO L93 Difference]: Finished difference Result 1840 states and 2543 transitions. [2023-04-02 22:57:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 22:57:18,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 59 [2023-04-02 22:57:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:57:18,065 INFO L225 Difference]: With dead ends: 1840 [2023-04-02 22:57:18,065 INFO L226 Difference]: Without dead ends: 1818 [2023-04-02 22:57:18,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=459, Invalid=2297, Unknown=0, NotChecked=0, Total=2756 [2023-04-02 22:57:18,066 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 303 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:57:18,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 306 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:57:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2023-04-02 22:57:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1719. [2023-04-02 22:57:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1254 states have (on average 1.2878787878787878) internal successors, (1615), 1274 states have internal predecessors, (1615), 367 states have call successors, (367), 98 states have call predecessors, (367), 97 states have return successors, (359), 346 states have call predecessors, (359), 359 states have call successors, (359) [2023-04-02 22:57:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2341 transitions. [2023-04-02 22:57:18,396 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2341 transitions. Word has length 59 [2023-04-02 22:57:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:57:18,396 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2341 transitions. [2023-04-02 22:57:18,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-02 22:57:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2341 transitions. [2023-04-02 22:57:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 22:57:18,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:57:18,397 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:57:18,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 22:57:18,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 22:57:18,602 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:57:18,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:57:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1631462211, now seen corresponding path program 1 times [2023-04-02 22:57:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:57:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88166926] [2023-04-02 22:57:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:57:18,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:57:18,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:57:18,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784274303] [2023-04-02 22:57:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:57:18,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:57:18,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:57:18,618 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:57:18,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 22:57:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:57:18,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 22:57:18,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:57:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 22:57:19,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:57:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 22:57:19,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:57:19,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88166926] [2023-04-02 22:57:19,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:57:19,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784274303] [2023-04-02 22:57:19,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784274303] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:57:19,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372132309] [2023-04-02 22:57:19,953 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 22:57:19,953 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:57:19,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:57:19,953 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:57:19,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:57:19,963 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:57:29,144 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:57:29,146 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:57:29,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:57:29,150 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:57:32,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23017#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:57:32,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:57:32,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:57:32,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2023-04-02 22:57:32,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105502411] [2023-04-02 22:57:32,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:57:32,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 22:57:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:57:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 22:57:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 22:57:32,701 INFO L87 Difference]: Start difference. First operand 1719 states and 2341 transitions. Second operand has 22 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 18 states have internal predecessors, (72), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-02 22:58:05,163 WARN L223 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 35 DAG size of output: 30 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:58:41,809 WARN L223 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 27 DAG size of output: 24 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:59:03,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:59:04,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:59:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:05,030 INFO L93 Difference]: Finished difference Result 2621 states and 3683 transitions. [2023-04-02 22:59:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-04-02 22:59:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 18 states have internal predecessors, (72), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 65 [2023-04-02 22:59:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:05,039 INFO L225 Difference]: With dead ends: 2621 [2023-04-02 22:59:05,039 INFO L226 Difference]: Without dead ends: 2619 [2023-04-02 22:59:05,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 77.1s TimeCoverageRelationStatistics Valid=944, Invalid=7064, Unknown=2, NotChecked=0, Total=8010 [2023-04-02 22:59:05,042 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 337 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 136 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:05,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 641 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1077 Invalid, 1 Unknown, 0 Unchecked, 19.1s Time] [2023-04-02 22:59:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2023-04-02 22:59:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1934. [2023-04-02 22:59:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1435 states have (on average 1.2989547038327527) internal successors, (1864), 1471 states have internal predecessors, (1864), 395 states have call successors, (395), 104 states have call predecessors, (395), 103 states have return successors, (387), 358 states have call predecessors, (387), 387 states have call successors, (387) [2023-04-02 22:59:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2646 transitions. [2023-04-02 22:59:05,455 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2646 transitions. Word has length 65 [2023-04-02 22:59:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:05,455 INFO L495 AbstractCegarLoop]: Abstraction has 1934 states and 2646 transitions. [2023-04-02 22:59:05,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 18 states have internal predecessors, (72), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-02 22:59:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2646 transitions. [2023-04-02 22:59:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 22:59:05,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:05,456 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:05,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-04-02 22:59:05,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 22:59:05,661 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:05,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1809269162, now seen corresponding path program 2 times [2023-04-02 22:59:05,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:05,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895915202] [2023-04-02 22:59:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:05,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:05,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492412510] [2023-04-02 22:59:05,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:59:05,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:05,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:05,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:05,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-02 22:59:05,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 22:59:05,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:05,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 22:59:05,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 22:59:05,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:59:05,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:05,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895915202] [2023-04-02 22:59:05,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:05,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492412510] [2023-04-02 22:59:05,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492412510] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:59:05,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:59:05,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:59:05,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597551292] [2023-04-02 22:59:05,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:59:05,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:59:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:59:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:59:05,762 INFO L87 Difference]: Start difference. First operand 1934 states and 2646 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-02 22:59:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:06,273 INFO L93 Difference]: Finished difference Result 3417 states and 4749 transitions. [2023-04-02 22:59:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:59:06,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 68 [2023-04-02 22:59:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:06,279 INFO L225 Difference]: With dead ends: 3417 [2023-04-02 22:59:06,279 INFO L226 Difference]: Without dead ends: 2313 [2023-04-02 22:59:06,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:59:06,281 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:06,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 98 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:59:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2023-04-02 22:59:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2152. [2023-04-02 22:59:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1559 states have (on average 1.2995509942270687) internal successors, (2026), 1595 states have internal predecessors, (2026), 489 states have call successors, (489), 104 states have call predecessors, (489), 103 states have return successors, (481), 452 states have call predecessors, (481), 481 states have call successors, (481) [2023-04-02 22:59:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2996 transitions. [2023-04-02 22:59:06,829 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2996 transitions. Word has length 68 [2023-04-02 22:59:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:06,830 INFO L495 AbstractCegarLoop]: Abstraction has 2152 states and 2996 transitions. [2023-04-02 22:59:06,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-02 22:59:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2996 transitions. [2023-04-02 22:59:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 22:59:06,831 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:06,831 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:06,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-04-02 22:59:07,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:07,035 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:07,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash 891695958, now seen corresponding path program 3 times [2023-04-02 22:59:07,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:07,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303529699] [2023-04-02 22:59:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:07,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:07,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140219951] [2023-04-02 22:59:07,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:59:07,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:07,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:07,045 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:07,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-02 22:59:07,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:59:07,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:07,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-02 22:59:07,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-02 22:59:07,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 22:59:08,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:08,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303529699] [2023-04-02 22:59:08,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:08,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140219951] [2023-04-02 22:59:08,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140219951] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:08,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411124817] [2023-04-02 22:59:08,463 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 22:59:08,463 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:08,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:08,464 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:08,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:08,498 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:17,677 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:59:17,678 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:17,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:17,681 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:21,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38337#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:21,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:21,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:21,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-04-02 22:59:21,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397584796] [2023-04-02 22:59:21,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:21,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 22:59:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 22:59:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 22:59:21,942 INFO L87 Difference]: Start difference. First operand 2152 states and 2996 transitions. Second operand has 26 states, 25 states have (on average 2.88) internal successors, (72), 23 states have internal predecessors, (72), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-02 22:59:33,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:59:39,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:59:48,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:48,816 INFO L93 Difference]: Finished difference Result 3014 states and 4161 transitions. [2023-04-02 22:59:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-02 22:59:48,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.88) internal successors, (72), 23 states have internal predecessors, (72), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 70 [2023-04-02 22:59:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:48,824 INFO L225 Difference]: With dead ends: 3014 [2023-04-02 22:59:48,824 INFO L226 Difference]: Without dead ends: 3008 [2023-04-02 22:59:48,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=968, Invalid=6513, Unknown=1, NotChecked=0, Total=7482 [2023-04-02 22:59:48,826 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 434 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 266 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:48,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 690 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 936 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2023-04-02 22:59:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2023-04-02 22:59:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2610. [2023-04-02 22:59:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 1946 states have (on average 1.289311408016444) internal successors, (2509), 1982 states have internal predecessors, (2509), 521 states have call successors, (521), 144 states have call predecessors, (521), 142 states have return successors, (514), 483 states have call predecessors, (514), 514 states have call successors, (514) [2023-04-02 22:59:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 3544 transitions. [2023-04-02 22:59:49,555 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 3544 transitions. Word has length 70 [2023-04-02 22:59:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:49,556 INFO L495 AbstractCegarLoop]: Abstraction has 2610 states and 3544 transitions. [2023-04-02 22:59:49,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.88) internal successors, (72), 23 states have internal predecessors, (72), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-02 22:59:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 3544 transitions. [2023-04-02 22:59:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 22:59:49,557 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:49,557 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:49,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-04-02 22:59:49,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:49,761 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:49,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:49,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1520975003, now seen corresponding path program 1 times [2023-04-02 22:59:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:49,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062931901] [2023-04-02 22:59:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:49,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:49,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:49,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605833718] [2023-04-02 22:59:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:49,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:49,769 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:49,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-02 22:59:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:59:49,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 81 conjunts are in the unsatisfiable core [2023-04-02 22:59:49,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-02 22:59:50,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-02 22:59:55,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:55,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062931901] [2023-04-02 22:59:55,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:55,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605833718] [2023-04-02 22:59:55,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605833718] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:55,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887989205] [2023-04-02 22:59:55,144 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-04-02 22:59:55,145 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:55,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:55,145 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:55,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:55,160 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:00:04,433 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:00:04,435 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 23:00:04,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:00:04,438 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:00:09,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47013#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:00:09,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:00:09,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:00:09,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-04-02 23:00:09,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808185044] [2023-04-02 23:00:09,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:00:09,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 23:00:09,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:00:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 23:00:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2713, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 23:00:09,599 INFO L87 Difference]: Start difference. First operand 2610 states and 3544 transitions. Second operand has 33 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21)