/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/hard-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:21:06,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:21:06,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:21:06,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:21:06,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:21:06,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:21:06,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:21:06,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:21:06,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:21:06,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:21:06,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:21:06,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:21:06,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:21:06,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:21:06,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:21:06,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:21:06,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:21:06,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:21:06,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:21:06,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:21:06,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:21:06,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:21:06,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:21:06,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:21:06,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:21:06,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:21:06,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:21:06,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:21:06,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:21:06,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:21:06,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:21:06,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:21:06,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:21:06,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:21:06,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:21:06,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:21:06,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:21:06,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:21:06,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:21:06,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:21:06,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:21:06,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:21:06,171 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:21:06,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:21:06,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:21:06,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:21:06,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:21:06,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:21:06,173 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:21:06,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:21:06,173 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:21:06,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:21:06,174 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:21:06,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:21:06,174 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:21:06,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:21:06,174 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:21:06,175 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:21:06,175 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:21:06,175 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:21:06,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:21:06,176 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:21:06,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:21:06,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:21:06,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:21:06,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:21:06,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:21:06,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:21:06,177 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:21:06,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:21:06,177 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:21:06,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:21:06,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:21:06,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:21:06,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:21:06,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:21:06,178 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:21:06,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:21:06,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:21:06,179 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:21:06,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:21:06,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:21:06,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:21:06,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:21:06,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:21:06,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:21:06,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:21:06,420 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:21:06,421 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:21:06,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2023-04-01 05:21:07,589 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:21:07,793 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:21:07,794 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2023-04-01 05:21:07,802 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8bfc426/f967b55d9f3741b79ee2ec697f79b6c3/FLAG06486373a [2023-04-01 05:21:07,817 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8bfc426/f967b55d9f3741b79ee2ec697f79b6c3 [2023-04-01 05:21:07,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:21:07,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:21:07,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:21:07,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:21:07,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:21:07,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:21:07" (1/1) ... [2023-04-01 05:21:07,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278aa170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:07, skipping insertion in model container [2023-04-01 05:21:07,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:21:07" (1/1) ... [2023-04-01 05:21:07,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:21:07,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:21:07,982 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/hard-ll_valuebound20.c[538,551] [2023-04-01 05:21:08,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:21:08,011 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:21:08,022 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/hard-ll_valuebound20.c[538,551] [2023-04-01 05:21:08,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:21:08,045 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:21:08,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08 WrapperNode [2023-04-01 05:21:08,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:21:08,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:21:08,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:21:08,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:21:08,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,070 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:21:08,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:21:08,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:21:08,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:21:08,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (1/1) ... [2023-04-01 05:21:08,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:21:08,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:21:08,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:21:08,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:21:08,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:21:08,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:21:08,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:21:08,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:21:08,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:21:08,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:21:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:21:08,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:21:08,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:21:08,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:21:08,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:21:08,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:21:08,210 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:21:08,212 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:21:08,378 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:21:08,409 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:21:08,409 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 05:21:08,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:21:08 BoogieIcfgContainer [2023-04-01 05:21:08,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:21:08,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:21:08,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:21:08,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:21:08,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:21:07" (1/3) ... [2023-04-01 05:21:08,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37503daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:21:08, skipping insertion in model container [2023-04-01 05:21:08,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:21:08" (2/3) ... [2023-04-01 05:21:08,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37503daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:21:08, skipping insertion in model container [2023-04-01 05:21:08,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:21:08" (3/3) ... [2023-04-01 05:21:08,420 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2023-04-01 05:21:08,433 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:21:08,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:21:08,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:21:08,482 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;@44370bc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:21:08,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:21:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 05:21:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 05:21:08,494 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:08,494 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:21:08,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:08,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash -91855496, now seen corresponding path program 1 times [2023-04-01 05:21:08,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:08,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641858644] [2023-04-01 05:21:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:08,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:21:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:21:08,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:21:08,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641858644] [2023-04-01 05:21:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641858644] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:21:08,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:21:08,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:21:08,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513644325] [2023-04-01 05:21:08,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:21:08,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:21:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:21:08,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:21:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:21:08,976 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 05:21:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:21:09,086 INFO L93 Difference]: Finished difference Result 66 states and 105 transitions. [2023-04-01 05:21:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:21:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-04-01 05:21:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:21:09,095 INFO L225 Difference]: With dead ends: 66 [2023-04-01 05:21:09,095 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 05:21:09,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:21:09,103 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:21:09,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:21:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 05:21:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-04-01 05:21:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 05:21:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-04-01 05:21:09,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2023-04-01 05:21:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:21:09,154 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-04-01 05:21:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 05:21:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-04-01 05:21:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 05:21:09,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:09,156 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:21:09,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:21:09,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:09,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash -445599122, now seen corresponding path program 1 times [2023-04-01 05:21:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:09,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269588829] [2023-04-01 05:21:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:09,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:21:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:21:09,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:21:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269588829] [2023-04-01 05:21:09,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269588829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:21:09,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:21:09,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:21:09,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702275928] [2023-04-01 05:21:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:21:09,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:21:09,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:21:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:21:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:21:09,321 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 05:21:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:21:09,386 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-04-01 05:21:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:21:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-04-01 05:21:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:21:09,388 INFO L225 Difference]: With dead ends: 45 [2023-04-01 05:21:09,388 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 05:21:09,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:21:09,390 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:21:09,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:21:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 05:21:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2023-04-01 05:21:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 05:21:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-01 05:21:09,401 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2023-04-01 05:21:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:21:09,401 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-01 05:21:09,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 05:21:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-01 05:21:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 05:21:09,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:09,402 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:21:09,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:21:09,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:09,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:09,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1862588680, now seen corresponding path program 1 times [2023-04-01 05:21:09,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:09,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365024783] [2023-04-01 05:21:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:09,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:09,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:21:09,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362789416] [2023-04-01 05:21:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:09,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:21:09,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:21:09,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:21:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:21:09,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 05:21:09,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:21:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 05:21:09,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:21:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 05:21:09,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:21:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365024783] [2023-04-01 05:21:09,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:21:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362789416] [2023-04-01 05:21:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362789416] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:21:09,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119868060] [2023-04-01 05:21:09,905 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:21:09,906 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:21:09,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:21:09,913 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:21:09,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:21:10,009 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:21:10,284 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2023-04-01 05:21:10,304 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-01 05:21:10,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:21:10,314 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:21:10,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:21:10,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:21:10,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:21:10,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-01 05:21:10,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27129057] [2023-04-01 05:21:10,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:21:10,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:21:10,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:21:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:21:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:21:10,694 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 05:21:12,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:21:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:21:13,043 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2023-04-01 05:21:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:21:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 31 [2023-04-01 05:21:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:21:13,046 INFO L225 Difference]: With dead ends: 71 [2023-04-01 05:21:13,046 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 05:21:13,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:21:13,048 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:21:13,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 109 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 136 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 05:21:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 05:21:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-04-01 05:21:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 05:21:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2023-04-01 05:21:13,062 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 31 [2023-04-01 05:21:13,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:21:13,062 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2023-04-01 05:21:13,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 05:21:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2023-04-01 05:21:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 05:21:13,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:13,064 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2023-04-01 05:21:13,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:21:13,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:13,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:13,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:13,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1841225979, now seen corresponding path program 1 times [2023-04-01 05:21:13,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:13,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410648755] [2023-04-01 05:21:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:13,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:13,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:21:13,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611481701] [2023-04-01 05:21:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:13,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:13,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:21:13,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:21:13,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:21:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:21:13,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 05:21:13,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:21:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:21:13,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:21:13,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:21:13,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410648755] [2023-04-01 05:21:13,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:21:13,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611481701] [2023-04-01 05:21:13,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611481701] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:21:13,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:21:13,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 05:21:13,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863779966] [2023-04-01 05:21:13,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:21:13,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:21:13,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:21:13,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:21:13,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:21:13,564 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 05:21:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:21:13,783 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2023-04-01 05:21:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:21:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 38 [2023-04-01 05:21:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:21:13,786 INFO L225 Difference]: With dead ends: 67 [2023-04-01 05:21:13,786 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 05:21:13,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-04-01 05:21:13,787 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:21:13,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 91 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:21:13,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 05:21:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-04-01 05:21:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 05:21:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-04-01 05:21:13,815 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 38 [2023-04-01 05:21:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:21:13,816 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-04-01 05:21:13,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 05:21:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-04-01 05:21:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 05:21:13,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:13,817 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2023-04-01 05:21:13,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:21:14,018 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,SelfDestructingSolverStorable3 [2023-04-01 05:21:14,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:14,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash -860679289, now seen corresponding path program 1 times [2023-04-01 05:21:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:14,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576350958] [2023-04-01 05:21:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:14,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:14,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:21:14,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969652593] [2023-04-01 05:21:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:14,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:14,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:21:14,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:21:14,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:21:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:21:14,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 05:21:14,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:21:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 05:21:14,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:21:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 05:21:15,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:21:15,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576350958] [2023-04-01 05:21:15,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:21:15,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969652593] [2023-04-01 05:21:15,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969652593] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:21:15,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1382272850] [2023-04-01 05:21:15,028 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 05:21:15,028 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:21:15,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:21:15,029 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:21:15,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:21:15,048 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:21:15,502 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:21:15,505 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-01 05:21:15,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:21:15,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:21:15,767 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1389#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:21:15,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:21:15,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:21:15,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-04-01 05:21:15,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710334803] [2023-04-01 05:21:15,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:21:15,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 05:21:15,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:21:15,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 05:21:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:21:15,770 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-01 05:21:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:21:16,538 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2023-04-01 05:21:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:21:16,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 55 [2023-04-01 05:21:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:21:16,540 INFO L225 Difference]: With dead ends: 82 [2023-04-01 05:21:16,540 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 05:21:16,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:21:16,542 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:21:16,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 157 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 05:21:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 05:21:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-04-01 05:21:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 05:21:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2023-04-01 05:21:16,558 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 55 [2023-04-01 05:21:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:21:16,559 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2023-04-01 05:21:16,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-01 05:21:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2023-04-01 05:21:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 05:21:16,560 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:16,561 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1] [2023-04-01 05:21:16,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:21:16,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:16,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:16,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:16,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1143149830, now seen corresponding path program 1 times [2023-04-01 05:21:16,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:16,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182583739] [2023-04-01 05:21:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:16,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:16,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:21:16,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283810960] [2023-04-01 05:21:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:16,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:21:16,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:21:16,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:21:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:21:16,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 05:21:16,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:21:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 05:21:17,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:21:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-04-01 05:21:21,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:21:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182583739] [2023-04-01 05:21:21,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:21:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283810960] [2023-04-01 05:21:21,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283810960] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:21:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108678244] [2023-04-01 05:21:21,701 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 05:21:21,701 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:21:21,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:21:21,701 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:21:21,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:21:21,715 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:21:22,204 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:21:22,207 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-01 05:21:22,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:21:22,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:21:22,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2059#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:21:22,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:21:22,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:21:22,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-01 05:21:22,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275901282] [2023-04-01 05:21:22,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:21:22,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 05:21:22,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:21:22,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 05:21:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:21:22,688 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-04-01 05:21:27,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:21:27,112 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2023-04-01 05:21:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 05:21:27,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 67 [2023-04-01 05:21:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:21:27,114 INFO L225 Difference]: With dead ends: 112 [2023-04-01 05:21:27,114 INFO L226 Difference]: Without dead ends: 110 [2023-04-01 05:21:27,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2023-04-01 05:21:27,121 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:21:27,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 146 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 05:21:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-01 05:21:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2023-04-01 05:21:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 60 states have internal predecessors, (64), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 05:21:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2023-04-01 05:21:27,150 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 67 [2023-04-01 05:21:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:21:27,151 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2023-04-01 05:21:27,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-04-01 05:21:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2023-04-01 05:21:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 05:21:27,152 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:27,152 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 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] [2023-04-01 05:21:27,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:21:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:27,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:27,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -804203808, now seen corresponding path program 2 times [2023-04-01 05:21:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:27,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522769517] [2023-04-01 05:21:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:27,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:27,373 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:21:27,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617326189] [2023-04-01 05:21:27,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:21:27,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:27,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:21:27,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:21:27,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:21:27,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:21:27,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:21:27,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 05:21:27,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:21:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-04-01 05:21:27,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:21:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-04-01 05:21:28,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:21:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522769517] [2023-04-01 05:21:28,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:21:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617326189] [2023-04-01 05:21:28,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617326189] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:21:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1776533416] [2023-04-01 05:21:28,414 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 05:21:28,414 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:21:28,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:21:28,415 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:21:28,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:21:28,428 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:21:28,830 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:21:28,836 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-01 05:21:28,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:21:28,841 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:21:29,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2848#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:21:29,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:21:29,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:21:29,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-04-01 05:21:29,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985344768] [2023-04-01 05:21:29,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:21:29,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:21:29,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:21:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:21:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-04-01 05:21:29,018 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-01 05:21:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:21:30,504 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2023-04-01 05:21:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 05:21:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 72 [2023-04-01 05:21:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:21:30,506 INFO L225 Difference]: With dead ends: 127 [2023-04-01 05:21:30,507 INFO L226 Difference]: Without dead ends: 116 [2023-04-01 05:21:30,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:21:30,508 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:21:30,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 164 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 05:21:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-04-01 05:21:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2023-04-01 05:21:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.125) internal successors, (72), 67 states have internal predecessors, (72), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-01 05:21:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2023-04-01 05:21:30,539 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 72 [2023-04-01 05:21:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:21:30,539 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2023-04-01 05:21:30,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-01 05:21:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2023-04-01 05:21:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 05:21:30,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:30,541 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 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, 1] [2023-04-01 05:21:30,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:21:30,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:30,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:30,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1592897112, now seen corresponding path program 1 times [2023-04-01 05:21:30,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:30,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050042569] [2023-04-01 05:21:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:30,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:30,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:21:30,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889783936] [2023-04-01 05:21:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:30,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:21:30,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:21:30,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:21:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:21:30,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 05:21:30,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:21:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-04-01 05:21:31,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:21:31,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:21:31,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050042569] [2023-04-01 05:21:31,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:21:31,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889783936] [2023-04-01 05:21:31,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889783936] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:21:31,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [439898836] [2023-04-01 05:21:31,581 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 05:21:31,581 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:21:31,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:21:31,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:21:31,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:21:31,595 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:21:32,004 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:21:32,009 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-01 05:21:32,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:21:32,013 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:21:32,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3533#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:21:32,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:21:32,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:21:32,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 05:21:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857942195] [2023-04-01 05:21:32,259 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:21:32,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:21:32,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:21:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:21:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:21:32,260 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-01 05:21:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:21:32,649 INFO L93 Difference]: Finished difference Result 122 states and 147 transitions. [2023-04-01 05:21:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 05:21:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2023-04-01 05:21:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:21:32,650 INFO L225 Difference]: With dead ends: 122 [2023-04-01 05:21:32,650 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 05:21:32,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:21:32,652 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:21:32,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 151 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:21:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 05:21:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-01 05:21:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 05:21:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2023-04-01 05:21:32,681 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 78 [2023-04-01 05:21:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:21:32,681 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2023-04-01 05:21:32,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-01 05:21:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2023-04-01 05:21:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 05:21:32,682 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:21:32,682 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:21:32,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:21:32,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:32,889 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:21:32,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:21:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1126241543, now seen corresponding path program 3 times [2023-04-01 05:21:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:21:32,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621534714] [2023-04-01 05:21:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:21:32,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:21:32,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:21:32,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544609175] [2023-04-01 05:21:32,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:21:32,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:21:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:21:32,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:21:32,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:21:32,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:21:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:21:32,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 05:21:32,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:21:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 72 proven. 43 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-04-01 05:21:33,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:21:50,145 WARN L223 SmtUtils]: Spent 5.25s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)