./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:05:47,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:05:47,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:05:47,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:05:47,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:05:47,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:05:47,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:05:47,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:05:47,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:05:47,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:05:47,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:05:47,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:05:47,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:05:47,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:05:47,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:05:47,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:05:47,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:05:47,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:05:47,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:05:47,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:05:47,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:05:47,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:05:47,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:05:47,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:05:47,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:05:47,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:05:47,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:05:47,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:05:47,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:05:47,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:05:47,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:05:47,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:05:47,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:05:47,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:05:47,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:05:47,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:05:47,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:05:47,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:05:47,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:05:47,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:05:47,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:05:47,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:05:47,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:05:47,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:05:47,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:05:47,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:05:47,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:05:47,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:05:47,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:05:47,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:05:47,291 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:05:47,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:05:47,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:05:47,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:05:47,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:05:47,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:05:47,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:05:47,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:05:47,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:05:47,293 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:05:47,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:05:47,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:05:47,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:05:47,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:05:47,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:05:47,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:05:47,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:05:47,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:05:47,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:05:47,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:05:47,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:05:47,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:05:47,296 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:05:47,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:05:47,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:05:47,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:05:47,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 [2021-12-17 11:05:47,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:05:47,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:05:47,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:05:47,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:05:47,501 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:05:47,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard2.c [2021-12-17 11:05:47,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4c748d4/c94e97b4ed884964bcd3d8fb5a051ef5/FLAG0025b0330 [2021-12-17 11:05:47,923 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:05:47,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c [2021-12-17 11:05:47,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4c748d4/c94e97b4ed884964bcd3d8fb5a051ef5/FLAG0025b0330 [2021-12-17 11:05:47,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4c748d4/c94e97b4ed884964bcd3d8fb5a051ef5 [2021-12-17 11:05:47,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:05:47,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:05:47,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:05:47,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:05:47,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:05:47,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:05:47" (1/1) ... [2021-12-17 11:05:47,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a8b83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:47, skipping insertion in model container [2021-12-17 11:05:47,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:05:47" (1/1) ... [2021-12-17 11:05:47,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:05:47,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:05:48,062 WARN L230 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/hard2.c[526,539] [2021-12-17 11:05:48,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:05:48,075 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:05:48,082 WARN L230 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/hard2.c[526,539] [2021-12-17 11:05:48,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:05:48,094 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:05:48,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48 WrapperNode [2021-12-17 11:05:48,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:05:48,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:05:48,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:05:48,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:05:48,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,115 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2021-12-17 11:05:48,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:05:48,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:05:48,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:05:48,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:05:48,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:05:48,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:05:48,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:05:48,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:05:48,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (1/1) ... [2021-12-17 11:05:48,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:05:48,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:48,151 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) [2021-12-17 11:05:48,166 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 [2021-12-17 11:05:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:05:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:05:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:05:48,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:05:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:05:48,182 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:05:48,219 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:05:48,220 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:05:48,299 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:05:48,302 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:05:48,302 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 11:05:48,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:05:48 BoogieIcfgContainer [2021-12-17 11:05:48,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:05:48,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:05:48,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:05:48,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:05:48,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:05:47" (1/3) ... [2021-12-17 11:05:48,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716457bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:05:48, skipping insertion in model container [2021-12-17 11:05:48,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:48" (2/3) ... [2021-12-17 11:05:48,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716457bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:05:48, skipping insertion in model container [2021-12-17 11:05:48,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:05:48" (3/3) ... [2021-12-17 11:05:48,308 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.c [2021-12-17 11:05:48,311 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:05:48,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:05:48,362 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:05:48,367 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 11:05:48,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:05:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 11:05:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 11:05:48,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:48,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:48,382 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:48,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1812186719, now seen corresponding path program 1 times [2021-12-17 11:05:48,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:48,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746577982] [2021-12-17 11:05:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:48,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:05:48,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746577982] [2021-12-17 11:05:48,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746577982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:48,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:48,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:05:48,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054106106] [2021-12-17 11:05:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:48,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:05:48,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:48,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:05:48,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:05:48,533 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:05:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:48,583 INFO L93 Difference]: Finished difference Result 61 states and 105 transitions. [2021-12-17 11:05:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:05:48,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 11:05:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:48,590 INFO L225 Difference]: With dead ends: 61 [2021-12-17 11:05:48,590 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 11:05:48,592 INFO L932 BasicCegarLoop]: 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 [2021-12-17 11:05:48,594 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:48,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 110 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 11:05:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-12-17 11:05:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:05:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-12-17 11:05:48,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2021-12-17 11:05:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:48,659 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-12-17 11:05:48,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:05:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-12-17 11:05:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 11:05:48,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:48,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:48,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:05:48,661 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:48,661 INFO L85 PathProgramCache]: Analyzing trace with hash 876512919, now seen corresponding path program 1 times [2021-12-17 11:05:48,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:48,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805132289] [2021-12-17 11:05:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:48,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:48,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 11:05:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:05:48,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805132289] [2021-12-17 11:05:48,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805132289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:48,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:48,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:05:48,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729769974] [2021-12-17 11:05:48,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:48,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:05:48,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:05:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:05:48,713 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:05:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:48,777 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-12-17 11:05:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:05:48,778 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-17 11:05:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:48,779 INFO L225 Difference]: With dead ends: 37 [2021-12-17 11:05:48,779 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 11:05:48,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:05:48,780 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:48,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 87 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:48,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 11:05:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-12-17 11:05:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:05:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-17 11:05:48,794 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 12 [2021-12-17 11:05:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:48,795 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-17 11:05:48,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:05:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-17 11:05:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 11:05:48,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:48,798 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:48,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 11:05:48,799 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:48,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2107096801, now seen corresponding path program 1 times [2021-12-17 11:05:48,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:48,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843698] [2021-12-17 11:05:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:48,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:48,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:05:48,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307416642] [2021-12-17 11:05:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:48,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:48,833 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) [2021-12-17 11:05:48,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:05:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 11:05:48,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:05:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:05:48,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:05:48,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:48,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843698] [2021-12-17 11:05:48,975 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:05:48,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307416642] [2021-12-17 11:05:48,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307416642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:48,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:48,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:05:48,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67734779] [2021-12-17 11:05:48,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:48,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:05:48,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:05:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:05:48,978 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:05:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:49,016 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-12-17 11:05:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:05:49,016 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-17 11:05:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:49,017 INFO L225 Difference]: With dead ends: 56 [2021-12-17 11:05:49,017 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 11:05:49,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:05:49,019 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:49,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 99 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 11:05:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-17 11:05:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 11:05:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-12-17 11:05:49,026 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2021-12-17 11:05:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:49,026 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-12-17 11:05:49,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:05:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-12-17 11:05:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 11:05:49,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:49,027 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:49,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:05:49,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:49,247 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2032872060, now seen corresponding path program 1 times [2021-12-17 11:05:49,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:49,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518745410] [2021-12-17 11:05:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:49,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:49,256 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:05:49,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126058090] [2021-12-17 11:05:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:49,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:49,267 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) [2021-12-17 11:05:49,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:05:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:49,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:05:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:05:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 11:05:49,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:05:49,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:49,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518745410] [2021-12-17 11:05:49,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:05:49,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126058090] [2021-12-17 11:05:49,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126058090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:49,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:49,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:05:49,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488211733] [2021-12-17 11:05:49,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:49,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:05:49,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:05:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:05:49,363 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:05:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:49,403 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-12-17 11:05:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:05:49,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-12-17 11:05:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:49,404 INFO L225 Difference]: With dead ends: 55 [2021-12-17 11:05:49,404 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 11:05:49,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:05:49,405 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:49,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 73 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 11:05:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-17 11:05:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 11:05:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-12-17 11:05:49,411 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 24 [2021-12-17 11:05:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:49,411 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-12-17 11:05:49,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:05:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-12-17 11:05:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 11:05:49,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:49,413 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:49,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:05:49,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 11:05:49,629 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:49,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1003977419, now seen corresponding path program 1 times [2021-12-17 11:05:49,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:49,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151399486] [2021-12-17 11:05:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:49,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:49,641 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:05:49,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148495462] [2021-12-17 11:05:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:49,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:49,643 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) [2021-12-17 11:05:49,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:05:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 11:05:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:05:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 11:05:49,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:05:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 11:05:49,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151399486] [2021-12-17 11:05:49,889 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:05:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148495462] [2021-12-17 11:05:49,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148495462] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:05:49,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:05:49,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-17 11:05:49,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682937231] [2021-12-17 11:05:49,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:49,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:05:49,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:05:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:05:49,891 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:05:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:49,945 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2021-12-17 11:05:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:05:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2021-12-17 11:05:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:49,947 INFO L225 Difference]: With dead ends: 59 [2021-12-17 11:05:49,947 INFO L226 Difference]: Without dead ends: 57 [2021-12-17 11:05:49,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:05:49,948 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:49,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-17 11:05:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-12-17 11:05:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 11:05:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-12-17 11:05:49,954 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 34 [2021-12-17 11:05:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:49,954 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-12-17 11:05:49,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:05:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-12-17 11:05:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 11:05:49,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:49,955 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:49,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:05:50,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:50,168 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1409666923, now seen corresponding path program 1 times [2021-12-17 11:05:50,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:50,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698137584] [2021-12-17 11:05:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:50,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:50,177 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:05:50,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52970345] [2021-12-17 11:05:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:50,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:50,179 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) [2021-12-17 11:05:50,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:05:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 11:05:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:05:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 11:05:50,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:05:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 11:05:51,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:51,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698137584] [2021-12-17 11:05:51,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:05:51,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52970345] [2021-12-17 11:05:51,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52970345] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:05:51,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:05:51,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-17 11:05:51,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055952945] [2021-12-17 11:05:51,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:05:51,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 11:05:51,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:51,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 11:05:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:05:51,166 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-17 11:05:57,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:05:59,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:06:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:06:00,298 INFO L93 Difference]: Finished difference Result 144 states and 200 transitions. [2021-12-17 11:06:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 11:06:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 54 [2021-12-17 11:06:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:06:00,301 INFO L225 Difference]: With dead ends: 144 [2021-12-17 11:06:00,301 INFO L226 Difference]: Without dead ends: 115 [2021-12-17 11:06:00,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:06:00,302 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 78 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:06:00,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 178 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 207 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2021-12-17 11:06:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-17 11:06:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2021-12-17 11:06:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 66 states have internal predecessors, (77), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 11:06:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-12-17 11:06:00,327 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 54 [2021-12-17 11:06:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:06:00,328 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-12-17 11:06:00,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-17 11:06:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-12-17 11:06:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 11:06:00,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:06:00,332 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:06:00,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:06:00,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:06:00,548 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:06:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:06:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash 135028242, now seen corresponding path program 1 times [2021-12-17 11:06:00,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:06:00,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741755598] [2021-12-17 11:06:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:06:00,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:06:00,560 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:06:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382351139] [2021-12-17 11:06:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:06:00,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:06:00,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:06:00,584 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) [2021-12-17 11:06:00,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:06:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:06:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 11:06:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:06:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 11:06:01,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:06:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-17 11:06:01,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:06:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741755598] [2021-12-17 11:06:01,239 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:06:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382351139] [2021-12-17 11:06:01,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382351139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:06:01,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:06:01,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-12-17 11:06:01,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098145389] [2021-12-17 11:06:01,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:06:01,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 11:06:01,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:06:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 11:06:01,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-17 11:06:01,250 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 15 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-17 11:06:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:06:01,506 INFO L93 Difference]: Finished difference Result 159 states and 209 transitions. [2021-12-17 11:06:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 11:06:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 65 [2021-12-17 11:06:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:06:01,508 INFO L225 Difference]: With dead ends: 159 [2021-12-17 11:06:01,508 INFO L226 Difference]: Without dead ends: 105 [2021-12-17 11:06:01,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-17 11:06:01,509 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:06:01,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 135 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:06:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-17 11:06:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2021-12-17 11:06:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 59 states have internal predecessors, (66), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 11:06:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2021-12-17 11:06:01,518 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 65 [2021-12-17 11:06:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:06:01,518 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2021-12-17 11:06:01,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-17 11:06:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2021-12-17 11:06:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 11:06:01,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:06:01,519 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:06:01,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 11:06:01,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:06:01,736 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:06:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:06:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1189112541, now seen corresponding path program 1 times [2021-12-17 11:06:01,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:06:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989660862] [2021-12-17 11:06:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:06:01,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:06:01,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:06:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790832315] [2021-12-17 11:06:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:06:01,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:06:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:06:01,757 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) [2021-12-17 11:06:01,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:06:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:06:01,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 11:06:01,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:06:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-12-17 11:06:01,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:06:01,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:06:01,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989660862] [2021-12-17 11:06:01,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:06:01,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790832315] [2021-12-17 11:06:01,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790832315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:06:01,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:06:01,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:06:01,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132617870] [2021-12-17 11:06:01,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:06:01,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:06:01,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:06:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:06:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:06:01,941 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 11:06:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:06:01,973 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2021-12-17 11:06:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:06:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-12-17 11:06:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:06:01,975 INFO L225 Difference]: With dead ends: 105 [2021-12-17 11:06:01,975 INFO L226 Difference]: Without dead ends: 93 [2021-12-17 11:06:01,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:06:01,976 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:06:01,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 67 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:06:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-17 11:06:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-17 11:06:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 11:06:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-12-17 11:06:01,983 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 74 [2021-12-17 11:06:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:06:01,984 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-12-17 11:06:01,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 11:06:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-12-17 11:06:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 11:06:01,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:06:01,985 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-17 11:06:02,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 11:06:02,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:06:02,203 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:06:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:06:02,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2022890084, now seen corresponding path program 2 times [2021-12-17 11:06:02,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:06:02,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502047736] [2021-12-17 11:06:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:06:02,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:06:02,210 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:06:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360880523] [2021-12-17 11:06:02,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:06:02,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:06:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:06:02,211 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) [2021-12-17 11:06:02,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:06:02,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:06:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:06:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 11:06:02,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:06:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-17 11:06:02,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:06:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-17 11:06:22,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:06:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502047736] [2021-12-17 11:06:22,181 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:06:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360880523] [2021-12-17 11:06:22,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360880523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:06:22,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:06:22,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-12-17 11:06:22,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109831871] [2021-12-17 11:06:22,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:06:22,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 11:06:22,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:06:22,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 11:06:22,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=277, Unknown=3, NotChecked=0, Total=380 [2021-12-17 11:06:22,182 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-17 11:06:41,584 WARN L227 SmtUtils]: Spent 17.37s on a formula simplification. DAG size of input: 186 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:06:53,306 WARN L227 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 65 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:06:59,137 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:07:04,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:07:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:07:04,469 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2021-12-17 11:07:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 11:07:04,470 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 84 [2021-12-17 11:07:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:07:04,471 INFO L225 Difference]: With dead ends: 241 [2021-12-17 11:07:04,472 INFO L226 Difference]: Without dead ends: 190 [2021-12-17 11:07:04,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=245, Invalid=622, Unknown=3, NotChecked=0, Total=870 [2021-12-17 11:07:04,473 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 139 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 342 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:07:04,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 447 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 632 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 11:07:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-17 11:07:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2021-12-17 11:07:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 98 states have internal predecessors, (117), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 11:07:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 196 transitions. [2021-12-17 11:07:04,499 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 196 transitions. Word has length 84 [2021-12-17 11:07:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:07:04,500 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 196 transitions. [2021-12-17 11:07:04,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-17 11:07:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 196 transitions. [2021-12-17 11:07:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 11:07:04,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:07:04,503 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-17 11:07:04,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 11:07:04,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:04,720 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:07:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:07:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash -757369614, now seen corresponding path program 3 times [2021-12-17 11:07:04,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:07:04,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848889587] [2021-12-17 11:07:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:07:04,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:07:04,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:07:04,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284599407] [2021-12-17 11:07:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:07:04,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:04,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:07:04,727 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:07:04,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 11:07:04,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 11:07:04,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:07:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 11:07:04,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:07:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-17 11:07:05,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:07:10,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:07:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848889587] [2021-12-17 11:07:10,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:07:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284599407] [2021-12-17 11:07:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284599407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:07:10,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:07:10,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 11:07:10,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559231146] [2021-12-17 11:07:10,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:07:10,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:07:10,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:07:10,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:07:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:07:10,778 INFO L87 Difference]: Start difference. First operand 154 states and 196 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 11:07:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:07:10,907 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2021-12-17 11:07:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:07:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2021-12-17 11:07:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:07:10,915 INFO L225 Difference]: With dead ends: 164 [2021-12-17 11:07:10,915 INFO L226 Difference]: Without dead ends: 162 [2021-12-17 11:07:10,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-17 11:07:10,916 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:07:10,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 50 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:07:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-17 11:07:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-17 11:07:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 104 states have internal predecessors, (123), 40 states have call successors, (40), 18 states have call predecessors, (40), 18 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 11:07:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2021-12-17 11:07:10,935 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 89 [2021-12-17 11:07:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:07:10,936 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2021-12-17 11:07:10,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 11:07:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2021-12-17 11:07:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-17 11:07:10,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:07:10,938 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:07:10,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 11:07:11,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 11:07:11,154 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:07:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:07:11,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1030960765, now seen corresponding path program 1 times [2021-12-17 11:07:11,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:07:11,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815731694] [2021-12-17 11:07:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:07:11,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:07:11,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:07:11,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859634456] [2021-12-17 11:07:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:07:11,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:07:11,168 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:07:11,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 11:07:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:07:11,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 11:07:11,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:07:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-17 11:07:11,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:07:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-17 11:07:12,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:07:12,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815731694] [2021-12-17 11:07:12,114 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:07:12,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859634456] [2021-12-17 11:07:12,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859634456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:07:12,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:07:12,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-17 11:07:12,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274274510] [2021-12-17 11:07:12,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:07:12,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 11:07:12,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:07:12,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 11:07:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:07:12,115 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2021-12-17 11:07:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:07:12,320 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2021-12-17 11:07:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:07:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 100 [2021-12-17 11:07:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:07:12,321 INFO L225 Difference]: With dead ends: 174 [2021-12-17 11:07:12,321 INFO L226 Difference]: Without dead ends: 166 [2021-12-17 11:07:12,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:07:12,322 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:07:12,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 351 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:07:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-17 11:07:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-12-17 11:07:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 105 states have (on average 1.180952380952381) internal successors, (124), 106 states have internal predecessors, (124), 42 states have call successors, (42), 18 states have call predecessors, (42), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-17 11:07:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2021-12-17 11:07:12,338 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 100 [2021-12-17 11:07:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:07:12,339 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2021-12-17 11:07:12,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2021-12-17 11:07:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2021-12-17 11:07:12,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 11:07:12,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:07:12,340 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:07:12,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 11:07:12,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:12,555 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:07:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:07:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash 581208592, now seen corresponding path program 1 times [2021-12-17 11:07:12,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:07:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421518500] [2021-12-17 11:07:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:07:12,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:07:12,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:07:12,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688614754] [2021-12-17 11:07:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:07:12,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:12,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:07:12,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:07:12,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 11:07:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:07:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 11:07:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:07:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-12-17 11:07:12,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:07:12,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:07:12,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421518500] [2021-12-17 11:07:12,877 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:07:12,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688614754] [2021-12-17 11:07:12,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688614754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:07:12,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:07:12,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 11:07:12,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789784035] [2021-12-17 11:07:12,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:07:12,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:07:12,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:07:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:07:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:07:12,879 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-17 11:07:12,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:07:12,976 INFO L93 Difference]: Finished difference Result 221 states and 281 transitions. [2021-12-17 11:07:12,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:07:12,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2021-12-17 11:07:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:07:12,979 INFO L225 Difference]: With dead ends: 221 [2021-12-17 11:07:12,980 INFO L226 Difference]: Without dead ends: 183 [2021-12-17 11:07:12,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:07:12,981 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 10 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:07:12,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:07:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-17 11:07:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2021-12-17 11:07:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 100 states have (on average 1.16) internal successors, (116), 101 states have internal predecessors, (116), 38 states have call successors, (38), 18 states have call predecessors, (38), 18 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-17 11:07:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2021-12-17 11:07:13,004 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 101 [2021-12-17 11:07:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:07:13,005 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2021-12-17 11:07:13,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-17 11:07:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2021-12-17 11:07:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 11:07:13,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:07:13,006 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 11:07:13,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 11:07:13,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 11:07:13,239 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:07:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:07:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash -458727034, now seen corresponding path program 2 times [2021-12-17 11:07:13,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:07:13,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550181176] [2021-12-17 11:07:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:07:13,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:07:13,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:07:13,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529707721] [2021-12-17 11:07:13,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:07:13,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:07:13,251 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:07:13,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 11:07:13,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:07:13,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:07:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 11:07:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:07:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-12-17 11:07:13,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:07:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-12-17 11:07:13,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:07:13,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550181176] [2021-12-17 11:07:13,643 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:07:13,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529707721] [2021-12-17 11:07:13,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529707721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:07:13,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:07:13,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-12-17 11:07:13,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624023116] [2021-12-17 11:07:13,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:07:13,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:07:13,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:07:13,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:07:13,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:07:13,645 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2021-12-17 11:07:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:07:13,696 INFO L93 Difference]: Finished difference Result 187 states and 226 transitions. [2021-12-17 11:07:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:07:13,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 110 [2021-12-17 11:07:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:07:13,698 INFO L225 Difference]: With dead ends: 187 [2021-12-17 11:07:13,698 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 11:07:13,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:07:13,699 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:07:13,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 191 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:07:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 11:07:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-12-17 11:07:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 78 states have internal predecessors, (86), 24 states have call successors, (24), 17 states have call predecessors, (24), 17 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 11:07:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2021-12-17 11:07:13,710 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 110 [2021-12-17 11:07:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:07:13,710 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2021-12-17 11:07:13,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2021-12-17 11:07:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2021-12-17 11:07:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 11:07:13,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:07:13,711 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-17 11:07:13,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-17 11:07:13,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 11:07:13,925 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:07:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:07:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1864958347, now seen corresponding path program 4 times [2021-12-17 11:07:13,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:07:13,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578414730] [2021-12-17 11:07:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:07:13,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:07:13,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:07:13,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557991031] [2021-12-17 11:07:13,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:07:13,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:07:13,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:07:13,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:07:13,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 11:07:14,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:07:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:07:14,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 11:07:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15