./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-scaling/hard2_valuebound5.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 a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:46:19,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:46:19,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:46:19,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:46:19,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:46:19,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:46:19,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:46:19,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:46:19,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:46:19,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:46:19,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:46:19,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:46:19,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:46:19,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:46:19,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:46:19,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:46:19,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:46:19,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:46:19,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:46:19,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:46:19,472 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:46:19,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:46:19,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:46:19,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:46:19,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:46:19,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:46:19,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:46:19,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:46:19,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:46:19,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:46:19,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:46:19,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:46:19,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:46:19,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:46:19,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:46:19,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:46:19,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:46:19,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:46:19,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:46:19,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:46:19,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:46:19,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:46:19,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:46:19,502 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:46:19,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:46:19,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:46:19,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:46:19,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:46:19,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:46:19,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:46:19,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:46:19,504 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:46:19,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:46:19,504 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:46:19,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:46:19,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:46:19,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:46:19,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:46:19,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:46:19,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:46:19,505 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:46:19,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:46:19,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:46:19,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:46:19,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:46:19,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:46:19,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:46:19,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:46:19,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:46:19,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:46:19,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:46:19,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:46:19,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:46:19,507 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:46:19,507 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:46:19,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:46:19,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 [2022-07-13 16:46:19,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:46:19,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:46:19,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:46:19,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:46:19,679 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:46:19,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2022-07-13 16:46:19,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbd23703/46878ee1781c4e69a3feb9b835ed6fd1/FLAGdbbc3fb87 [2022-07-13 16:46:20,103 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:46:20,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2022-07-13 16:46:20,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbd23703/46878ee1781c4e69a3feb9b835ed6fd1/FLAGdbbc3fb87 [2022-07-13 16:46:20,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbd23703/46878ee1781c4e69a3feb9b835ed6fd1 [2022-07-13 16:46:20,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:46:20,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:46:20,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:46:20,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:46:20,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:46:20,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75616552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20, skipping insertion in model container [2022-07-13 16:46:20,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:46:20,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:46:20,276 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-scaling/hard2_valuebound5.c[526,539] [2022-07-13 16:46:20,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:46:20,303 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:46:20,317 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-scaling/hard2_valuebound5.c[526,539] [2022-07-13 16:46:20,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:46:20,339 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:46:20,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20 WrapperNode [2022-07-13 16:46:20,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:46:20,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:46:20,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:46:20,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:46:20,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,362 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-07-13 16:46:20,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:46:20,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:46:20,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:46:20,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:46:20,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:46:20,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:46:20,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:46:20,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:46:20,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (1/1) ... [2022-07-13 16:46:20,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:46:20,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:20,407 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) [2022-07-13 16:46:20,412 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 [2022-07-13 16:46:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:46:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:46:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:46:20,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:46:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:46:20,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:46:20,475 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:46:20,477 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:46:20,588 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:46:20,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:46:20,592 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 16:46:20,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:46:20 BoogieIcfgContainer [2022-07-13 16:46:20,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:46:20,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:46:20,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:46:20,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:46:20,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:46:20" (1/3) ... [2022-07-13 16:46:20,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dcf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:46:20, skipping insertion in model container [2022-07-13 16:46:20,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:46:20" (2/3) ... [2022-07-13 16:46:20,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dcf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:46:20, skipping insertion in model container [2022-07-13 16:46:20,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:46:20" (3/3) ... [2022-07-13 16:46:20,599 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2022-07-13 16:46:20,608 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:46:20,609 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:46:20,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:46:20,693 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4dd87cca, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@56ff3038 [2022-07-13 16:46:20,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:46:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2022-07-13 16:46:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 16:46:20,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:20,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:46:20,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:20,712 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2022-07-13 16:46:20,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:20,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052031775] [2022-07-13 16:46:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:20,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:46:20,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:20,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052031775] [2022-07-13 16:46:20,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052031775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:46:20,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:46:20,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:46:20,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977138205] [2022-07-13 16:46:20,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:46:20,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:46:20,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:20,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:46:20,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:46:20,850 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-07-13 16:46:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:20,868 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2022-07-13 16:46:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:46:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2022-07-13 16:46:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:20,880 INFO L225 Difference]: With dead ends: 49 [2022-07-13 16:46:20,880 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 16:46:20,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:46:20,886 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:20,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:46:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 16:46:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-13 16:46:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:46:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-07-13 16:46:20,930 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2022-07-13 16:46:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:20,931 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-07-13 16:46:20,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-07-13 16:46:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-07-13 16:46:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 16:46:20,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:20,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:46:20,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:46:20,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2022-07-13 16:46:20,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:20,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815811348] [2022-07-13 16:46:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:46:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815811348] [2022-07-13 16:46:21,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815811348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:46:21,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:46:21,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:46:21,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318321737] [2022-07-13 16:46:21,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:46:21,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:46:21,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:21,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:46:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:46:21,029 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-13 16:46:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:21,083 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-07-13 16:46:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:46:21,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2022-07-13 16:46:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:21,084 INFO L225 Difference]: With dead ends: 35 [2022-07-13 16:46:21,085 INFO L226 Difference]: Without dead ends: 33 [2022-07-13 16:46:21,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:46:21,087 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:21,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:46:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-13 16:46:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-07-13 16:46:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-07-13 16:46:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-07-13 16:46:21,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2022-07-13 16:46:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:21,099 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-07-13 16:46:21,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-13 16:46:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-07-13 16:46:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 16:46:21,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:21,104 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:46:21,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 16:46:21,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:21,111 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2022-07-13 16:46:21,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:21,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353355174] [2022-07-13 16:46:21,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:21,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:21,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 16:46:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:46:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:21,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353355174] [2022-07-13 16:46:21,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353355174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:46:21,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:46:21,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:46:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298775853] [2022-07-13 16:46:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:46:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:46:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:46:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:46:21,178 INFO L87 Difference]: Start difference. First operand 26 states and 33 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, (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) [2022-07-13 16:46:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:21,243 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-07-13 16:46:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:46:21,244 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, (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 14 [2022-07-13 16:46:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:21,245 INFO L225 Difference]: With dead ends: 39 [2022-07-13 16:46:21,245 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 16:46:21,245 INFO L412 NwaCegarLoop]: 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 [2022-07-13 16:46:21,246 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:21,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:46:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 16:46:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-07-13 16:46:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 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) [2022-07-13 16:46:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-07-13 16:46:21,252 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2022-07-13 16:46:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:21,252 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-07-13 16:46:21,252 INFO L496 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, (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) [2022-07-13 16:46:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-07-13 16:46:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 16:46:21,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:21,253 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:46:21,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 16:46:21,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2022-07-13 16:46:21,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:21,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20030855] [2022-07-13 16:46:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:21,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:46:21,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631816929] [2022-07-13 16:46:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:21,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:21,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:21,267 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) [2022-07-13 16:46:21,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:46:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:46:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:46:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:46:21,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:46:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20030855] [2022-07-13 16:46:21,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:46:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631816929] [2022-07-13 16:46:21,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631816929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:46:21,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:46:21,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:46:21,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117975684] [2022-07-13 16:46:21,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:46:21,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:46:21,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:46:21,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:46:21,390 INFO L87 Difference]: Start difference. First operand 30 states and 36 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, (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) [2022-07-13 16:46:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:21,438 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-13 16:46:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:46:21,438 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, (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 19 [2022-07-13 16:46:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:21,439 INFO L225 Difference]: With dead ends: 58 [2022-07-13 16:46:21,439 INFO L226 Difference]: Without dead ends: 44 [2022-07-13 16:46:21,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:46:21,441 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:21,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:46:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-13 16:46:21,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-13 16:46:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 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) [2022-07-13 16:46:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-07-13 16:46:21,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 19 [2022-07-13 16:46:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:21,448 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-07-13 16:46:21,448 INFO L496 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, (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) [2022-07-13 16:46:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-07-13 16:46:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 16:46:21,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:21,449 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:46:21,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:46:21,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:21,666 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2022-07-13 16:46:21,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:21,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535471005] [2022-07-13 16:46:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:21,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:21,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:46:21,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701801423] [2022-07-13 16:46:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:21,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:21,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:21,683 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) [2022-07-13 16:46:21,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:46:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:21,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:46:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:46:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:46:21,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:46:21,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:21,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535471005] [2022-07-13 16:46:21,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:46:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701801423] [2022-07-13 16:46:21,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701801423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:46:21,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:46:21,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:46:21,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035383482] [2022-07-13 16:46:21,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:46:21,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:46:21,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:46:21,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:46:21,790 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-13 16:46:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:21,850 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-13 16:46:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:46:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 26 [2022-07-13 16:46:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:21,854 INFO L225 Difference]: With dead ends: 57 [2022-07-13 16:46:21,854 INFO L226 Difference]: Without dead ends: 50 [2022-07-13 16:46:21,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:46:21,859 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:21,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:46:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-13 16:46:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-13 16:46:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 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) [2022-07-13 16:46:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-13 16:46:21,882 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 26 [2022-07-13 16:46:21,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:21,882 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-13 16:46:21,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-13 16:46:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-13 16:46:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 16:46:21,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:21,884 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:46:21,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 16:46:22,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:22,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:22,102 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2022-07-13 16:46:22,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:22,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299562782] [2022-07-13 16:46:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:22,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:46:22,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229091509] [2022-07-13 16:46:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:22,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:22,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:22,117 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) [2022-07-13 16:46:22,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 16:46:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 16:46:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:46:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 16:46:22,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:46:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 16:46:22,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:22,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299562782] [2022-07-13 16:46:22,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:46:22,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229091509] [2022-07-13 16:46:22,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229091509] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:46:22,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:46:22,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-13 16:46:22,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563430158] [2022-07-13 16:46:22,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:46:22,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:46:22,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:22,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:46:22,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:46:22,296 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-13 16:46:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:22,475 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-07-13 16:46:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:46:22,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 36 [2022-07-13 16:46:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:22,477 INFO L225 Difference]: With dead ends: 61 [2022-07-13 16:46:22,477 INFO L226 Difference]: Without dead ends: 59 [2022-07-13 16:46:22,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:46:22,478 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:22,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 80 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 16:46:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-13 16:46:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-13 16:46:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 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) [2022-07-13 16:46:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-07-13 16:46:22,484 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2022-07-13 16:46:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:22,484 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-07-13 16:46:22,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-13 16:46:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-07-13 16:46:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 16:46:22,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:22,486 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-13 16:46:22,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:46:22,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:22,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2022-07-13 16:46:22,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:22,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201645065] [2022-07-13 16:46:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:22,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:22,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:46:22,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897936673] [2022-07-13 16:46:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:22,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:22,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:22,712 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) [2022-07-13 16:46:22,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 16:46:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:22,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 16:46:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:46:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-13 16:46:22,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:46:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-13 16:46:23,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201645065] [2022-07-13 16:46:23,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:46:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897936673] [2022-07-13 16:46:23,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897936673] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:46:23,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:46:23,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-13 16:46:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872947924] [2022-07-13 16:46:23,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:46:23,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:46:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:46:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:46:23,508 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2022-07-13 16:46:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:27,912 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2022-07-13 16:46:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:46:27,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 56 [2022-07-13 16:46:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:27,914 INFO L225 Difference]: With dead ends: 146 [2022-07-13 16:46:27,914 INFO L226 Difference]: Without dead ends: 117 [2022-07-13 16:46:27,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:46:27,915 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:27,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 138 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 16:46:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-13 16:46:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2022-07-13 16:46:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 64 states have (on average 1.234375) internal successors, (79), 68 states have internal predecessors, (79), 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) [2022-07-13 16:46:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2022-07-13 16:46:27,938 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 56 [2022-07-13 16:46:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:27,939 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2022-07-13 16:46:27,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2022-07-13 16:46:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2022-07-13 16:46:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 16:46:27,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:27,944 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-13 16:46:27,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 16:46:28,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:28,180 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:28,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2022-07-13 16:46:28,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:28,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213330382] [2022-07-13 16:46:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:28,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:28,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:46:28,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275974892] [2022-07-13 16:46:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:28,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:28,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:28,190 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) [2022-07-13 16:46:28,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 16:46:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:28,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 16:46:28,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:46:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-13 16:46:28,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:46:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 16:46:28,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:28,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213330382] [2022-07-13 16:46:28,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:46:28,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275974892] [2022-07-13 16:46:28,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275974892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:46:28,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:46:28,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-07-13 16:46:28,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317521507] [2022-07-13 16:46:28,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:46:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 16:46:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 16:46:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-13 16:46:28,627 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-13 16:46:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:29,055 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2022-07-13 16:46:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:46:29,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 67 [2022-07-13 16:46:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:29,056 INFO L225 Difference]: With dead ends: 161 [2022-07-13 16:46:29,057 INFO L226 Difference]: Without dead ends: 107 [2022-07-13 16:46:29,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-07-13 16:46:29,057 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:29,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 129 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 16:46:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-13 16:46:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2022-07-13 16:46:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 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) [2022-07-13 16:46:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2022-07-13 16:46:29,078 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 67 [2022-07-13 16:46:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:29,078 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2022-07-13 16:46:29,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-13 16:46:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2022-07-13 16:46:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 16:46:29,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:29,079 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-13 16:46:29,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 16:46:29,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:29,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1842513023, now seen corresponding path program 1 times [2022-07-13 16:46:29,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:29,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626318736] [2022-07-13 16:46:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:29,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:46:29,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031254325] [2022-07-13 16:46:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:29,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:29,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:29,307 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) [2022-07-13 16:46:29,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 16:46:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 16:46:29,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:46:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-13 16:46:29,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:46:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626318736] [2022-07-13 16:46:29,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:46:29,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031254325] [2022-07-13 16:46:29,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031254325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:46:29,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:46:29,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:46:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263622824] [2022-07-13 16:46:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:46:29,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:46:29,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:46:29,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:46:29,441 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-13 16:46:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:29,480 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2022-07-13 16:46:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:46:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 76 [2022-07-13 16:46:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:29,481 INFO L225 Difference]: With dead ends: 107 [2022-07-13 16:46:29,481 INFO L226 Difference]: Without dead ends: 95 [2022-07-13 16:46:29,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:46:29,482 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:29,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:46:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-13 16:46:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-13 16:46:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 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) [2022-07-13 16:46:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2022-07-13 16:46:29,490 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 76 [2022-07-13 16:46:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:29,490 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2022-07-13 16:46:29,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-13 16:46:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2022-07-13 16:46:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 16:46:29,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:29,503 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:46:29,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 16:46:29,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:29,720 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:29,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1412721000, now seen corresponding path program 1 times [2022-07-13 16:46:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:29,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640054378] [2022-07-13 16:46:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:29,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:29,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:46:29,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233901452] [2022-07-13 16:46:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:29,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:29,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:29,728 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) [2022-07-13 16:46:29,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 16:46:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:46:29,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 16:46:29,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:46:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-07-13 16:46:29,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:46:29,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640054378] [2022-07-13 16:46:29,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:46:29,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233901452] [2022-07-13 16:46:29,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233901452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:46:29,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:46:29,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 16:46:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332829469] [2022-07-13 16:46:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:46:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:46:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:46:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:46:29,895 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-13 16:46:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:46:30,025 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-07-13 16:46:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:46:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-07-13 16:46:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:46:30,026 INFO L225 Difference]: With dead ends: 131 [2022-07-13 16:46:30,026 INFO L226 Difference]: Without dead ends: 97 [2022-07-13 16:46:30,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:46:30,027 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:46:30,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:46:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-13 16:46:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2022-07-13 16:46:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 19 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 16:46:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-07-13 16:46:30,034 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 86 [2022-07-13 16:46:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:46:30,035 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-07-13 16:46:30,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-13 16:46:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-07-13 16:46:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 16:46:30,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:46:30,036 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-13 16:46:30,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 16:46:30,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:30,251 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:46:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:46:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2022-07-13 16:46:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:46:30,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974881108] [2022-07-13 16:46:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:46:30,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:46:30,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:46:30,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272902434] [2022-07-13 16:46:30,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:46:30,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:46:30,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:46:30,260 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) [2022-07-13 16:46:30,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 16:46:30,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:46:30,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:46:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 16:46:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:46:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 16:46:30,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:46:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 16:46:49,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:46:49,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974881108] [2022-07-13 16:46:49,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:46:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272902434] [2022-07-13 16:46:49,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272902434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:46:49,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:46:49,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-07-13 16:46:49,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865411818] [2022-07-13 16:46:49,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:46:49,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 16:46:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:46:49,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 16:46:49,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=278, Unknown=2, NotChecked=0, Total=380 [2022-07-13 16:46:49,255 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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) [2022-07-13 16:47:25,916 WARN L233 SmtUtils]: Spent 35.16s on a formula simplification. DAG size of input: 229 DAG size of output: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:47:27,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:47:44,042 WARN L233 SmtUtils]: Spent 9.38s on a formula simplification. DAG size of input: 82 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:47:53,093 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 107 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:47:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:47:56,776 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2022-07-13 16:47:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 16:47:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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 86 [2022-07-13 16:47:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:47:56,778 INFO L225 Difference]: With dead ends: 214 [2022-07-13 16:47:56,778 INFO L226 Difference]: Without dead ends: 178 [2022-07-13 16:47:56,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=245, Invalid=623, Unknown=2, NotChecked=0, Total=870 [2022-07-13 16:47:56,779 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 109 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:47:56,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 247 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-07-13 16:47:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-13 16:47:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2022-07-13 16:47:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 92 states have internal predecessors, (107), 34 states have call successors, (34), 16 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 16:47:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 174 transitions. [2022-07-13 16:47:56,797 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 174 transitions. Word has length 86 [2022-07-13 16:47:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:47:56,797 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 174 transitions. [2022-07-13 16:47:56,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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) [2022-07-13 16:47:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 174 transitions. [2022-07-13 16:47:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 16:47:56,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:47:56,798 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-13 16:47:56,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 16:47:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 16:47:56,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:47:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:47:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash 672233719, now seen corresponding path program 3 times [2022-07-13 16:47:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:47:57,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082059752] [2022-07-13 16:47:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:47:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:47:57,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:47:57,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629959872] [2022-07-13 16:47:57,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:47:57,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:47:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:47:57,012 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) [2022-07-13 16:47:57,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 16:47:57,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 16:47:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:47:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 16:47:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:47:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-13 16:47:57,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:48:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:48:04,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082059752] [2022-07-13 16:48:04,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:48:04,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629959872] [2022-07-13 16:48:04,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629959872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:48:04,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:48:04,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-13 16:48:04,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705666812] [2022-07-13 16:48:04,085 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:48:04,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 16:48:04,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:48:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 16:48:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:48:04,086 INFO L87 Difference]: Start difference. First operand 142 states and 174 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-07-13 16:48:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:48:04,163 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2022-07-13 16:48:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 16:48:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 91 [2022-07-13 16:48:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:48:04,165 INFO L225 Difference]: With dead ends: 152 [2022-07-13 16:48:04,165 INFO L226 Difference]: Without dead ends: 150 [2022-07-13 16:48:04,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-13 16:48:04,165 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:48:04,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 49 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:48:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-13 16:48:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-07-13 16:48:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 34 states have call successors, (34), 18 states have call predecessors, (34), 18 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 16:48:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 180 transitions. [2022-07-13 16:48:04,182 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 180 transitions. Word has length 91 [2022-07-13 16:48:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:48:04,182 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 180 transitions. [2022-07-13 16:48:04,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-07-13 16:48:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 180 transitions. [2022-07-13 16:48:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-13 16:48:04,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:48:04,183 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-13 16:48:04,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 16:48:04,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:48:04,402 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:48:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:48:04,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1149721345, now seen corresponding path program 1 times [2022-07-13 16:48:04,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:48:04,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115349188] [2022-07-13 16:48:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:48:04,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:48:04,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:48:04,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97665262] [2022-07-13 16:48:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:48:04,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:48:04,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:48:04,418 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) [2022-07-13 16:48:04,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 16:48:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:48:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 16:48:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:48:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-13 16:48:04,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:48:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-13 16:48:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:48:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115349188] [2022-07-13 16:48:05,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:48:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97665262] [2022-07-13 16:48:05,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97665262] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:48:05,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:48:05,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-13 16:48:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356667220] [2022-07-13 16:48:05,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:48:05,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:48:05,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:48:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:48:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:48:05,084 INFO L87 Difference]: Start difference. First operand 150 states and 180 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-07-13 16:48:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:48:05,600 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2022-07-13 16:48:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 16:48:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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 102 [2022-07-13 16:48:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:48:05,601 INFO L225 Difference]: With dead ends: 158 [2022-07-13 16:48:05,601 INFO L226 Difference]: Without dead ends: 150 [2022-07-13 16:48:05,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:48:05,602 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 16:48:05,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 264 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 16:48:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-13 16:48:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-07-13 16:48:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 98 states have internal predecessors, (112), 34 states have call successors, (34), 18 states have call predecessors, (34), 18 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 16:48:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 179 transitions. [2022-07-13 16:48:05,624 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 179 transitions. Word has length 102 [2022-07-13 16:48:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:48:05,624 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 179 transitions. [2022-07-13 16:48:05,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-07-13 16:48:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 179 transitions. [2022-07-13 16:48:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 16:48:05,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:48:05,625 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-13 16:48:05,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 16:48:05,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 16:48:05,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:48:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:48:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1393289704, now seen corresponding path program 2 times [2022-07-13 16:48:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:48:05,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805926485] [2022-07-13 16:48:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:48:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:48:05,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:48:05,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041938237] [2022-07-13 16:48:05,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:48:05,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:48:05,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:48:05,836 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) [2022-07-13 16:48:05,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 16:48:05,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:48:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:48:05,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 16:48:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:48:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-07-13 16:48:05,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:48:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2022-07-13 16:48:06,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:48:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805926485] [2022-07-13 16:48:06,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:48:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041938237] [2022-07-13 16:48:06,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041938237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:48:06,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:48:06,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-07-13 16:48:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471660712] [2022-07-13 16:48:06,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:48:06,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 16:48:06,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:48:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 16:48:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:48:06,057 INFO L87 Difference]: Start difference. First operand 150 states and 179 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2022-07-13 16:48:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:48:06,132 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2022-07-13 16:48:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:48:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 112 [2022-07-13 16:48:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:48:06,133 INFO L225 Difference]: With dead ends: 180 [2022-07-13 16:48:06,133 INFO L226 Difference]: Without dead ends: 121 [2022-07-13 16:48:06,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:48:06,134 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:48:06,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 174 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:48:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-13 16:48:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-13 16:48:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 80 states have internal predecessors, (88), 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) [2022-07-13 16:48:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-07-13 16:48:06,146 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 112 [2022-07-13 16:48:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:48:06,147 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-07-13 16:48:06,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2022-07-13 16:48:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-07-13 16:48:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-13 16:48:06,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:48:06,148 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:48:06,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 16:48:06,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 16:48:06,363 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:48:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:48:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash 289773103, now seen corresponding path program 3 times [2022-07-13 16:48:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:48:06,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348429674] [2022-07-13 16:48:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:48:06,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:48:06,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:48:06,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299852685] [2022-07-13 16:48:06,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:48:06,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:48:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:48:06,384 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) [2022-07-13 16:48:06,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 16:48:06,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 16:48:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:48:06,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 16:48:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:48:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 144 proven. 4 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-07-13 16:48:08,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:48:21,822 WARN L855 $PredicateComparison]: unable to prove that (or (not (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|)) (= |c_ULTIMATE.start_main_~p~0#1| 1) (let ((.cse0 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse6 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse9 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse10 (< |c_ULTIMATE.start_main_~p~0#1| 0))) (let ((.cse5 (not .cse10)) (.cse4 (* (+ .cse9 1 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~B~0#1|)) (.cse3 (and (not .cse6) .cse10)) (.cse1 (* (- 1) .cse0)) (.cse2 (* (+ .cse9 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~B~0#1|)) (.cse8 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse7 (< |c_ULTIMATE.start_main_~d~0#1| 0))) (and (or (not (<= .cse0 |c_ULTIMATE.start_main_~r~0#1|)) (and (or (= (+ |c_ULTIMATE.start_main_~r~0#1| .cse1 .cse2) |c_ULTIMATE.start_main_~A~0#1|) .cse3) (or (= (+ .cse4 |c_ULTIMATE.start_main_~r~0#1| .cse1) |c_ULTIMATE.start_main_~A~0#1|) .cse5 .cse6)) (and .cse7 (not .cse8))) (or (not (<= (+ .cse0 1) |c_ULTIMATE.start_main_~r~0#1|)) (and (or .cse5 (= (+ (- 1) .cse4 |c_ULTIMATE.start_main_~r~0#1| .cse1) |c_ULTIMATE.start_main_~A~0#1|) .cse6) (or .cse3 (= (+ (- 1) |c_ULTIMATE.start_main_~r~0#1| .cse1 .cse2) |c_ULTIMATE.start_main_~A~0#1|))) .cse8 (not .cse7)))))) is different from true [2022-07-13 16:48:33,374 WARN L855 $PredicateComparison]: unable to prove that (or (not (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|)) (= |c_ULTIMATE.start_main_~p~0#1| 1) (let ((.cse3 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse4 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse7 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse4)) (.cse1 (not .cse3)) (.cse6 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse5 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0))) (and (let ((.cse0 (+ .cse7 1))) (or (not (<= .cse0 |c_ULTIMATE.start_main_~r~0#1|)) (and (or .cse1 (= .cse0 .cse2)) (or .cse3 (= .cse4 .cse0))) .cse5 (not .cse6))) (or (not (<= .cse7 |c_ULTIMATE.start_main_~r~0#1|)) (and (or (= .cse7 .cse4) .cse3) (or (= .cse7 .cse2) .cse1 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and .cse6 (not .cse5))))))) is different from true [2022-07-13 16:48:36,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:48:36,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348429674] [2022-07-13 16:48:36,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:48:36,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299852685] [2022-07-13 16:48:36,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299852685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:48:36,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:48:36,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-13 16:48:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870070150] [2022-07-13 16:48:36,657 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:48:36,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 16:48:36,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:48:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 16:48:36,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=267, Unknown=2, NotChecked=70, Total=420 [2022-07-13 16:48:36,658 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 16:48:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:48:36,992 INFO L93 Difference]: Finished difference Result 162 states and 188 transitions. [2022-07-13 16:48:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 16:48:36,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 116 [2022-07-13 16:48:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:48:36,993 INFO L225 Difference]: With dead ends: 162 [2022-07-13 16:48:36,994 INFO L226 Difference]: Without dead ends: 160 [2022-07-13 16:48:36,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=107, Invalid=361, Unknown=2, NotChecked=82, Total=552 [2022-07-13 16:48:36,994 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:48:36,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 116 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 150 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-07-13 16:48:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-13 16:48:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2022-07-13 16:48:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 106 states have internal predecessors, (114), 35 states have call successors, (35), 21 states have call predecessors, (35), 21 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-13 16:48:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-07-13 16:48:37,015 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 116 [2022-07-13 16:48:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:48:37,016 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-07-13 16:48:37,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 16:48:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-07-13 16:48:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-13 16:48:37,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:48:37,017 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-13 16:48:37,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 16:48:37,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 16:48:37,233 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:48:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:48:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1978716845, now seen corresponding path program 4 times [2022-07-13 16:48:37,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:48:37,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259849842] [2022-07-13 16:48:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:48:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:48:37,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:48:37,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543459305] [2022-07-13 16:48:37,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 16:48:37,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:48:37,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:48:37,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:48:37,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 16:48:37,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 16:48:37,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:48:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-13 16:48:37,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:48:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-13 16:48:37,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:49:21,430 WARN L233 SmtUtils]: Spent 9.36s on a formula simplification that was a NOOP. DAG size: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)