./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/prod4br-ll_valuebound10.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 16c3a7f72afea5c31f48392b3db26aa208b15a5c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 07:41:41,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:41:41,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:41:41,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:41:41,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:41:41,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:41:41,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:41:41,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:41:41,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:41:41,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:41:41,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:41:41,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:41:41,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:41:41,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:41:41,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:41:41,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:41:41,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:41:41,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:41:41,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:41:41,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:41:41,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:41:41,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:41:41,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:41:41,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:41:41,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:41:41,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:41:41,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:41:41,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:41:41,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:41:41,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:41:41,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:41:41,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:41:41,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:41:41,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:41:41,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:41:41,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:41:41,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:41:41,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:41:41,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:41:41,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:41:41,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:41:41,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:41:41,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:41:41,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:41:41,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:41:41,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:41:41,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:41:41,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:41:41,381 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:41:41,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:41:41,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:41:41,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:41:41,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:41:41,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:41:41,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:41:41,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:41:41,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:41:41,383 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:41:41,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:41:41,383 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:41:41,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:41:41,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:41:41,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:41:41,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:41:41,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:41:41,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:41:41,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:41:41,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:41:41,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:41:41,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:41:41,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:41:41,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:41:41,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c3a7f72afea5c31f48392b3db26aa208b15a5c [2021-08-26 07:41:41,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:41:41,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:41:41,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:41:41,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:41:41,638 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:41:41,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2021-08-26 07:41:41,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9066d58eb/09ddeff599c2462789d5838a478d502e/FLAG58140ed33 [2021-08-26 07:41:42,014 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:41:42,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2021-08-26 07:41:42,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9066d58eb/09ddeff599c2462789d5838a478d502e/FLAG58140ed33 [2021-08-26 07:41:42,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9066d58eb/09ddeff599c2462789d5838a478d502e [2021-08-26 07:41:42,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:41:42,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:41:42,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:41:42,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:41:42,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:41:42,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509dabc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42, skipping insertion in model container [2021-08-26 07:41:42,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:41:42,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:41:42,590 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c[524,537] [2021-08-26 07:41:42,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:41:42,609 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:41:42,616 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c[524,537] [2021-08-26 07:41:42,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:41:42,629 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:41:42,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42 WrapperNode [2021-08-26 07:41:42,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:41:42,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:41:42,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:41:42,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:41:42,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:41:42,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:41:42,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:41:42,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:41:42,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:41:42,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:41:42,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:41:42,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:41:42,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (1/1) ... [2021-08-26 07:41:42,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:41:42,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:42,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 07:41:42,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 07:41:42,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:41:42,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:41:42,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:41:42,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:41:43,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:41:43,018 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-26 07:41:43,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:41:43 BoogieIcfgContainer [2021-08-26 07:41:43,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:41:43,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:41:43,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:41:43,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:41:43,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:41:42" (1/3) ... [2021-08-26 07:41:43,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db38a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:41:43, skipping insertion in model container [2021-08-26 07:41:43,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:41:42" (2/3) ... [2021-08-26 07:41:43,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db38a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:41:43, skipping insertion in model container [2021-08-26 07:41:43,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:41:43" (3/3) ... [2021-08-26 07:41:43,025 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound10.c [2021-08-26 07:41:43,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:41:43,032 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 07:41:43,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:41:43,076 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 07:41:43,077 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 07:41:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 07:41:43,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:43,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:43,089 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:43,092 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-08-26 07:41:43,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:43,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529736689] [2021-08-26 07:41:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:43,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:43,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:43,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529736689] [2021-08-26 07:41:43,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529736689] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:41:43,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:41:43,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 07:41:43,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577313129] [2021-08-26 07:41:43,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 07:41:43,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:43,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 07:41:43,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:41:43,204 INFO L87 Difference]: Start difference. First operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:43,213 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-08-26 07:41:43,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 07:41:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 07:41:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:43,219 INFO L225 Difference]: With dead ends: 53 [2021-08-26 07:41:43,219 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 07:41:43,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:41:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 07:41:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-26 07:41:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-26 07:41:43,239 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-08-26 07:41:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:43,240 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-26 07:41:43,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-26 07:41:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 07:41:43,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:43,241 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:43,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 07:41:43,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-08-26 07:41:43,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:43,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542526889] [2021-08-26 07:41:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:43,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:43,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:43,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251000552] [2021-08-26 07:41:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:43,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:43,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:43,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:43,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 07:41:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 07:41:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:41:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:43,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:43,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542526889] [2021-08-26 07:41:43,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:41:43,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251000552] [2021-08-26 07:41:43,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251000552] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:41:43,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:41:43,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:41:43,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571192] [2021-08-26 07:41:43,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:41:43,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:43,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:41:43,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:41:43,493 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:43,551 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-08-26 07:41:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:41:43,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 07:41:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:43,552 INFO L225 Difference]: With dead ends: 41 [2021-08-26 07:41:43,553 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 07:41:43,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:41:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 07:41:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-08-26 07:41:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-08-26 07:41:43,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2021-08-26 07:41:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:43,557 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-08-26 07:41:43,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-08-26 07:41:43,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:41:43,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:43,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:43,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 07:41:43,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:43,777 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:43,778 INFO L82 PathProgramCache]: Analyzing trace with hash -937517175, now seen corresponding path program 1 times [2021-08-26 07:41:43,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:43,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725702690] [2021-08-26 07:41:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:43,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:43,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:43,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174674147] [2021-08-26 07:41:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:43,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:43,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:43,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:43,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 07:41:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:43,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 07:41:43,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:41:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:44,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:44,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725702690] [2021-08-26 07:41:44,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:41:44,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174674147] [2021-08-26 07:41:44,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174674147] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:41:44,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:41:44,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-26 07:41:44,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122605698] [2021-08-26 07:41:44,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:41:44,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:41:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:41:44,541 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:48,926 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-08-26 07:41:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:41:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 07:41:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:48,927 INFO L225 Difference]: With dead ends: 39 [2021-08-26 07:41:48,927 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 07:41:48,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-08-26 07:41:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 07:41:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-08-26 07:41:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-08-26 07:41:48,931 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 14 [2021-08-26 07:41:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:48,931 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-08-26 07:41:48,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-08-26 07:41:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 07:41:48,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:48,932 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:48,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 07:41:49,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 07:41:49,133 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1003041614, now seen corresponding path program 1 times [2021-08-26 07:41:49,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:49,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381446109] [2021-08-26 07:41:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:49,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:49,144 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:49,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436351858] [2021-08-26 07:41:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:49,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:49,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:49,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 07:41:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:49,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 07:41:49,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:41:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:50,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:50,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381446109] [2021-08-26 07:41:50,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:41:50,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436351858] [2021-08-26 07:41:50,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436351858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:41:50,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:41:50,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 07:41:50,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426637351] [2021-08-26 07:41:50,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 07:41:50,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 07:41:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:41:50,349 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:50,765 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-08-26 07:41:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:41:50,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 07:41:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:50,766 INFO L225 Difference]: With dead ends: 53 [2021-08-26 07:41:50,767 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 07:41:50,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-26 07:41:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 07:41:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-08-26 07:41:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-08-26 07:41:50,770 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 15 [2021-08-26 07:41:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:50,770 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-08-26 07:41:50,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-08-26 07:41:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 07:41:50,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:50,774 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:50,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 07:41:50,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:50,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash 989284300, now seen corresponding path program 1 times [2021-08-26 07:41:50,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:50,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142306266] [2021-08-26 07:41:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:50,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:51,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:51,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347112485] [2021-08-26 07:41:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:51,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:51,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:51,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 07:41:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:51,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:41:51,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:41:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:51,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:51,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142306266] [2021-08-26 07:41:51,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:41:51,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347112485] [2021-08-26 07:41:51,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347112485] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:41:51,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:41:51,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 07:41:51,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827370952] [2021-08-26 07:41:51,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:41:51,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:51,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:41:51,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:41:51,205 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:51,308 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-08-26 07:41:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:41:51,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 07:41:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:51,309 INFO L225 Difference]: With dead ends: 48 [2021-08-26 07:41:51,309 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 07:41:51,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:41:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 07:41:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-08-26 07:41:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-08-26 07:41:51,313 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 16 [2021-08-26 07:41:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:51,313 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-08-26 07:41:51,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-08-26 07:41:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 07:41:51,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:51,314 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:51,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-26 07:41:51,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:51,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:51,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1032048289, now seen corresponding path program 1 times [2021-08-26 07:41:51,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:51,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088193447] [2021-08-26 07:41:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:51,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:51,523 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:51,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566238398] [2021-08-26 07:41:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:51,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:51,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:51,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:51,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 07:41:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:51,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 07:41:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:41:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:51,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:51,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088193447] [2021-08-26 07:41:51,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:41:51,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566238398] [2021-08-26 07:41:51,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566238398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:41:51,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:41:51,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:41:51,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499582129] [2021-08-26 07:41:51,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:41:51,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:41:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:41:51,855 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:52,223 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2021-08-26 07:41:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:41:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 07:41:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:52,224 INFO L225 Difference]: With dead ends: 67 [2021-08-26 07:41:52,224 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 07:41:52,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:41:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 07:41:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-08-26 07:41:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-08-26 07:41:52,229 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 16 [2021-08-26 07:41:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:52,229 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-08-26 07:41:52,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-08-26 07:41:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 07:41:52,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:52,230 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:52,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 07:41:52,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:52,433 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1931404169, now seen corresponding path program 1 times [2021-08-26 07:41:52,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:52,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021096] [2021-08-26 07:41:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:52,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:52,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:52,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381771471] [2021-08-26 07:41:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:52,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:52,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:52,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 07:41:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:52,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 07:41:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:41:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:52,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021096] [2021-08-26 07:41:52,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:41:52,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381771471] [2021-08-26 07:41:52,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381771471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:41:52,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:41:52,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:41:52,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442135205] [2021-08-26 07:41:52,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:41:52,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:52,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:41:52,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:41:52,709 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:52,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:52,936 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-08-26 07:41:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:41:52,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 07:41:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:52,937 INFO L225 Difference]: With dead ends: 76 [2021-08-26 07:41:52,937 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 07:41:52,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:41:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 07:41:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-08-26 07:41:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-08-26 07:41:52,941 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 17 [2021-08-26 07:41:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:52,941 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-08-26 07:41:52,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-08-26 07:41:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 07:41:52,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:52,942 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:52,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 07:41:53,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:53,153 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1931463751, now seen corresponding path program 1 times [2021-08-26 07:41:53,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:53,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673969507] [2021-08-26 07:41:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:53,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:53,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:53,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056440589] [2021-08-26 07:41:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:53,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:53,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:53,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:53,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 07:41:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 07:41:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:41:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:53,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:53,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673969507] [2021-08-26 07:41:53,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:41:53,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056440589] [2021-08-26 07:41:53,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056440589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:41:53,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:41:53,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:41:53,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896030823] [2021-08-26 07:41:53,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:41:53,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:53,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:41:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:41:53,441 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:53,592 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-08-26 07:41:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:41:53,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 07:41:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:53,592 INFO L225 Difference]: With dead ends: 67 [2021-08-26 07:41:53,593 INFO L226 Difference]: Without dead ends: 65 [2021-08-26 07:41:53,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:41:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-26 07:41:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2021-08-26 07:41:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 51 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-08-26 07:41:53,597 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 17 [2021-08-26 07:41:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:53,597 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-08-26 07:41:53,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-08-26 07:41:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 07:41:53,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:53,597 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:53,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 07:41:53,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:53,798 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:53,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:53,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1530166964, now seen corresponding path program 1 times [2021-08-26 07:41:53,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:53,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467823934] [2021-08-26 07:41:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:53,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:53,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:53,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547083583] [2021-08-26 07:41:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:53,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:53,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:53,807 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:53,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 07:41:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:41:53,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 07:41:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:41:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:41:54,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:41:54,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467823934] [2021-08-26 07:41:54,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:41:54,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547083583] [2021-08-26 07:41:54,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547083583] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:41:54,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:41:54,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 07:41:54,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423323479] [2021-08-26 07:41:54,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:41:54,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:41:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:41:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:41:54,113 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:41:54,185 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-08-26 07:41:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:41:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 07:41:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:41:54,186 INFO L225 Difference]: With dead ends: 70 [2021-08-26 07:41:54,186 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 07:41:54,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:41:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 07:41:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-08-26 07:41:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 57 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2021-08-26 07:41:54,199 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 18 [2021-08-26 07:41:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:41:54,199 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2021-08-26 07:41:54,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:41:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2021-08-26 07:41:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 07:41:54,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:41:54,203 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:41:54,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 07:41:54,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 07:41:54,413 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:41:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:41:54,414 INFO L82 PathProgramCache]: Analyzing trace with hash 191838595, now seen corresponding path program 2 times [2021-08-26 07:41:54,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:41:54,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458571558] [2021-08-26 07:41:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:41:54,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:41:54,421 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:41:54,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572815722] [2021-08-26 07:41:54,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:41:54,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:41:54,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:41:54,425 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:41:54,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 07:41:54,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:41:54,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:41:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 07:41:54,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:42:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:42:05,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:42:05,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458571558] [2021-08-26 07:42:05,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:42:05,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572815722] [2021-08-26 07:42:05,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572815722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:42:05,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:42:05,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 07:42:05,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606747474] [2021-08-26 07:42:05,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 07:42:05,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:42:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 07:42:05,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:42:05,793 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:42:06,323 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2021-08-26 07:42:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 07:42:06,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 07:42:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:42:06,324 INFO L225 Difference]: With dead ends: 73 [2021-08-26 07:42:06,324 INFO L226 Difference]: Without dead ends: 71 [2021-08-26 07:42:06,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-08-26 07:42:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-26 07:42:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2021-08-26 07:42:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-08-26 07:42:06,329 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 19 [2021-08-26 07:42:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:42:06,329 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-08-26 07:42:06,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-08-26 07:42:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 07:42:06,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:42:06,330 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:42:06,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 07:42:06,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 07:42:06,546 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:42:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:42:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1915371903, now seen corresponding path program 1 times [2021-08-26 07:42:06,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:42:06,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119681967] [2021-08-26 07:42:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:42:06,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:42:06,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:42:06,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905008090] [2021-08-26 07:42:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:42:06,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:42:06,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:42:06,554 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:42:06,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 07:42:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:42:06,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:42:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:42:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:42:06,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:42:06,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119681967] [2021-08-26 07:42:06,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:42:06,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905008090] [2021-08-26 07:42:06,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905008090] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:42:06,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:42:06,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 07:42:06,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915265017] [2021-08-26 07:42:06,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:42:06,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:42:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:42:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:42:06,925 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:42:11,701 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2021-08-26 07:42:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:42:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 07:42:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:42:11,702 INFO L225 Difference]: With dead ends: 81 [2021-08-26 07:42:11,702 INFO L226 Difference]: Without dead ends: 77 [2021-08-26 07:42:11,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:42:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-26 07:42:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-08-26 07:42:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2021-08-26 07:42:11,707 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 19 [2021-08-26 07:42:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:42:11,707 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2021-08-26 07:42:11,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2021-08-26 07:42:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:42:11,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:42:11,708 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:42:11,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 07:42:11,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 07:42:11,917 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:42:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:42:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1654558476, now seen corresponding path program 1 times [2021-08-26 07:42:11,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:42:11,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118749549] [2021-08-26 07:42:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:42:11,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:42:11,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:42:11,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361606268] [2021-08-26 07:42:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:42:11,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:42:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:42:11,924 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:42:11,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 07:42:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:42:12,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-26 07:42:12,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:42:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:42:13,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:42:13,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118749549] [2021-08-26 07:42:13,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:42:13,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361606268] [2021-08-26 07:42:13,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361606268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:42:13,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:42:13,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-26 07:42:13,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450307921] [2021-08-26 07:42:13,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:42:13,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:42:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:42:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:42:13,402 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:42:13,881 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2021-08-26 07:42:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:42:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-26 07:42:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:42:13,881 INFO L225 Difference]: With dead ends: 74 [2021-08-26 07:42:13,881 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 07:42:13,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-26 07:42:13,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 07:42:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-08-26 07:42:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.35) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-08-26 07:42:13,889 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 20 [2021-08-26 07:42:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:42:13,889 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-08-26 07:42:13,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:42:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-08-26 07:42:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:42:13,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:42:13,889 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:42:13,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-26 07:42:14,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 07:42:14,093 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:42:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:42:14,093 INFO L82 PathProgramCache]: Analyzing trace with hash 754316118, now seen corresponding path program 2 times [2021-08-26 07:42:14,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:42:14,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210864382] [2021-08-26 07:42:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:42:14,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:42:14,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:42:14,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873191301] [2021-08-26 07:42:14,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:42:14,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:42:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:42:14,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:42:14,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 07:42:14,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:42:14,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:42:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 07:42:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:42:30,953 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 34 [2021-08-26 07:42:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:42:56,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:42:56,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210864382] [2021-08-26 07:42:56,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:42:56,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873191301] [2021-08-26 07:42:56,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873191301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:42:56,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:42:56,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 07:42:56,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544507689] [2021-08-26 07:42:56,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 07:42:56,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:42:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 07:42:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:42:56,527 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:43:12,397 WARN L207 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-08-26 07:43:17,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:43:17,546 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2021-08-26 07:43:17,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 07:43:17,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-26 07:43:17,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:43:17,547 INFO L225 Difference]: With dead ends: 73 [2021-08-26 07:43:17,547 INFO L226 Difference]: Without dead ends: 71 [2021-08-26 07:43:17,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 20246.0ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-26 07:43:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-26 07:43:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2021-08-26 07:43:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.35) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:43:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-08-26 07:43:17,551 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 20 [2021-08-26 07:43:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:43:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-08-26 07:43:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:43:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-08-26 07:43:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:43:17,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:43:17,551 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:43:17,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 07:43:17,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 07:43:17,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:43:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:43:17,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1210343271, now seen corresponding path program 1 times [2021-08-26 07:43:17,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:43:17,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670172241] [2021-08-26 07:43:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:43:17,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:43:17,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:43:17,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983653637] [2021-08-26 07:43:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:43:17,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:43:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:43:17,765 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) [2021-08-26 07:43:17,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 07:43:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:43:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:43:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:43:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:43:18,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:43:18,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670172241] [2021-08-26 07:43:18,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:43:18,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983653637] [2021-08-26 07:43:18,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983653637] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:43:18,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:43:18,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 07:43:18,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388366142] [2021-08-26 07:43:18,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:43:18,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:43:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:43:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:43:18,213 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:43:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:43:26,975 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2021-08-26 07:43:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:43:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-26 07:43:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:43:26,976 INFO L225 Difference]: With dead ends: 93 [2021-08-26 07:43:26,976 INFO L226 Difference]: Without dead ends: 91 [2021-08-26 07:43:26,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:43:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-26 07:43:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2021-08-26 07:43:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.35) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:43:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-08-26 07:43:26,981 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 20 [2021-08-26 07:43:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:43:26,981 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-08-26 07:43:26,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:43:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-08-26 07:43:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:43:26,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:43:26,982 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:43:26,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 07:43:27,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 07:43:27,190 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:43:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:43:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash 564664091, now seen corresponding path program 1 times [2021-08-26 07:43:27,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:43:27,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545185158] [2021-08-26 07:43:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:43:27,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:43:27,196 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:43:27,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799167599] [2021-08-26 07:43:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:43:27,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:43:27,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:43:27,199 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:43:27,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 07:43:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:43:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 07:43:27,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:43:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:43:28,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:43:28,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545185158] [2021-08-26 07:43:28,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:43:28,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799167599] [2021-08-26 07:43:28,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799167599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:43:28,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:43:28,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-26 07:43:28,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69807122] [2021-08-26 07:43:28,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:43:28,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:43:28,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:43:28,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:43:28,222 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:43:38,160 WARN L207 SmtUtils]: Spent 9.10 s on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-08-26 07:43:56,403 WARN L207 SmtUtils]: Spent 18.19 s on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-08-26 07:44:09,583 WARN L207 SmtUtils]: Spent 13.10 s on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-08-26 07:44:29,656 WARN L207 SmtUtils]: Spent 18.16 s on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-08-26 07:44:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:44:30,074 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2021-08-26 07:44:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 07:44:30,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-26 07:44:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:44:30,075 INFO L225 Difference]: With dead ends: 82 [2021-08-26 07:44:30,075 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 07:44:30,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 59817.7ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-08-26 07:44:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 07:44:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-08-26 07:44:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-08-26 07:44:30,080 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 20 [2021-08-26 07:44:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:44:30,080 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-08-26 07:44:30,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-08-26 07:44:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:44:30,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:44:30,081 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:44:30,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 07:44:30,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:44:30,294 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:44:30,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:44:30,294 INFO L82 PathProgramCache]: Analyzing trace with hash -245616514, now seen corresponding path program 1 times [2021-08-26 07:44:30,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:44:30,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361073529] [2021-08-26 07:44:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:44:30,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:44:30,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:44:30,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939908230] [2021-08-26 07:44:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:44:30,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:44:30,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:44:30,301 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:44:30,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 07:44:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:44:30,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 07:44:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:44:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:44:31,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:44:31,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361073529] [2021-08-26 07:44:31,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:44:31,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939908230] [2021-08-26 07:44:31,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939908230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:44:31,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:44:31,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 07:44:31,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128037570] [2021-08-26 07:44:31,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 07:44:31,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:44:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 07:44:31,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:44:31,525 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:44:32,468 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2021-08-26 07:44:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:44:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 07:44:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:44:32,469 INFO L225 Difference]: With dead ends: 82 [2021-08-26 07:44:32,469 INFO L226 Difference]: Without dead ends: 80 [2021-08-26 07:44:32,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 506.1ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:44:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-26 07:44:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-08-26 07:44:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-08-26 07:44:32,474 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 21 [2021-08-26 07:44:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:44:32,474 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-08-26 07:44:32,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-08-26 07:44:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:44:32,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:44:32,475 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:44:32,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 07:44:32,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 07:44:32,675 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:44:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:44:32,675 INFO L82 PathProgramCache]: Analyzing trace with hash -245556932, now seen corresponding path program 1 times [2021-08-26 07:44:32,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:44:32,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69694848] [2021-08-26 07:44:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:44:32,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:44:32,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:44:32,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121033735] [2021-08-26 07:44:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:44:32,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:44:32,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:44:32,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:44:32,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 07:44:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:44:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 07:44:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:44:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:44:35,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:44:35,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69694848] [2021-08-26 07:44:35,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:44:35,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121033735] [2021-08-26 07:44:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121033735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:44:35,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:44:35,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 07:44:35,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49686173] [2021-08-26 07:44:35,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 07:44:35,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:44:35,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 07:44:35,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-26 07:44:35,225 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:44:39,822 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2021-08-26 07:44:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:44:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 07:44:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:44:39,823 INFO L225 Difference]: With dead ends: 86 [2021-08-26 07:44:39,823 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 07:44:39,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3877.2ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-08-26 07:44:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 07:44:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-08-26 07:44:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.323076923076923) internal successors, (86), 67 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-08-26 07:44:39,828 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 21 [2021-08-26 07:44:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:44:39,828 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-08-26 07:44:39,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-08-26 07:44:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:44:39,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:44:39,830 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:44:39,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 07:44:40,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 07:44:40,031 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:44:40,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:44:40,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1911492505, now seen corresponding path program 2 times [2021-08-26 07:44:40,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:44:40,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293682267] [2021-08-26 07:44:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:44:40,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:44:40,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:44:40,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924747316] [2021-08-26 07:44:40,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:44:40,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:44:40,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:44:40,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:44:40,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 07:44:40,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:44:40,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:44:40,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 07:44:40,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:44:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:44:40,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:44:40,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293682267] [2021-08-26 07:44:40,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:44:40,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924747316] [2021-08-26 07:44:40,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924747316] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:44:40,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:44:40,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 07:44:40,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993942304] [2021-08-26 07:44:40,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 07:44:40,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:44:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 07:44:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 07:44:40,522 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:44:40,552 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2021-08-26 07:44:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 07:44:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 07:44:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:44:40,553 INFO L225 Difference]: With dead ends: 118 [2021-08-26 07:44:40,553 INFO L226 Difference]: Without dead ends: 89 [2021-08-26 07:44:40,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 07:44:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-26 07:44:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-08-26 07:44:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 79 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2021-08-26 07:44:40,560 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 21 [2021-08-26 07:44:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:44:40,561 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2021-08-26 07:44:40,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:44:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2021-08-26 07:44:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:44:40,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:44:40,561 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:44:40,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 07:44:40,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 07:44:40,780 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:44:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:44:40,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1135367230, now seen corresponding path program 2 times [2021-08-26 07:44:40,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:44:40,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472966257] [2021-08-26 07:44:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:44:40,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:44:40,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:44:40,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689879743] [2021-08-26 07:44:40,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:44:40,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:44:40,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:44:40,789 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:44:40,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 07:44:41,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:44:41,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:44:41,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 07:44:41,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:44:52,011 WARN L207 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 34 [2021-08-26 07:45:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:45:02,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:02,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472966257] [2021-08-26 07:45:02,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:02,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689879743] [2021-08-26 07:45:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689879743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:45:02,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:45:02,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 07:45:02,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804858638] [2021-08-26 07:45:02,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 07:45:02,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 07:45:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:45:02,429 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:20,897 WARN L207 SmtUtils]: Spent 16.18 s on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-08-26 07:45:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:21,490 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2021-08-26 07:45:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:45:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 07:45:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:21,491 INFO L225 Difference]: With dead ends: 93 [2021-08-26 07:45:21,491 INFO L226 Difference]: Without dead ends: 91 [2021-08-26 07:45:21,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 24988.6ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-26 07:45:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-26 07:45:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-08-26 07:45:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 79 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2021-08-26 07:45:21,496 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 21 [2021-08-26 07:45:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:21,497 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2021-08-26 07:45:21,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2021-08-26 07:45:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:45:21,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:21,497 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:21,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:21,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:21,698 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:21,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:21,698 INFO L82 PathProgramCache]: Analyzing trace with hash 326020604, now seen corresponding path program 2 times [2021-08-26 07:45:21,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:21,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812984547] [2021-08-26 07:45:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:21,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:21,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:21,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743130864] [2021-08-26 07:45:21,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:45:21,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:21,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:21,725 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:21,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 07:45:22,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:45:22,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:45:22,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 07:45:22,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:45:24,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:24,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812984547] [2021-08-26 07:45:24,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:24,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743130864] [2021-08-26 07:45:24,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743130864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:45:24,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:45:24,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 07:45:24,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14057615] [2021-08-26 07:45:24,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 07:45:24,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:24,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 07:45:24,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:45:24,185 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:25,561 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-08-26 07:45:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:45:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 07:45:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:25,561 INFO L225 Difference]: With dead ends: 98 [2021-08-26 07:45:25,561 INFO L226 Difference]: Without dead ends: 96 [2021-08-26 07:45:25,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-26 07:45:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-26 07:45:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-08-26 07:45:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2021-08-26 07:45:25,568 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 21 [2021-08-26 07:45:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:25,568 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2021-08-26 07:45:25,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2021-08-26 07:45:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 07:45:25,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:25,568 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:25,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:25,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:25,769 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash -870536625, now seen corresponding path program 1 times [2021-08-26 07:45:25,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:25,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652154567] [2021-08-26 07:45:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:25,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:25,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:25,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323449205] [2021-08-26 07:45:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:25,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:25,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:25,785 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:25,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 07:45:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:45:26,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:45:26,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:45:26,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:26,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652154567] [2021-08-26 07:45:26,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:26,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323449205] [2021-08-26 07:45:26,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323449205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:45:26,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:45:26,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:45:26,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114569178] [2021-08-26 07:45:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:45:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:45:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:45:26,389 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:26,453 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2021-08-26 07:45:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:45:26,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-26 07:45:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:26,454 INFO L225 Difference]: With dead ends: 127 [2021-08-26 07:45:26,454 INFO L226 Difference]: Without dead ends: 94 [2021-08-26 07:45:26,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:45:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-26 07:45:26,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-08-26 07:45:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 79 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-08-26 07:45:26,461 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 22 [2021-08-26 07:45:26,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:26,461 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-08-26 07:45:26,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:26,461 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-08-26 07:45:26,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 07:45:26,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:26,462 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:26,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:26,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-26 07:45:26,669 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:26,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1519233459, now seen corresponding path program 2 times [2021-08-26 07:45:26,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:26,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671867024] [2021-08-26 07:45:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:26,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:26,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:26,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814241378] [2021-08-26 07:45:26,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:45:26,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:26,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:26,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:26,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 07:45:27,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:45:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:45:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 07:45:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:45:27,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:27,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671867024] [2021-08-26 07:45:27,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:27,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814241378] [2021-08-26 07:45:27,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814241378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:45:27,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:45:27,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:45:27,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078961247] [2021-08-26 07:45:27,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:45:27,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:27,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:45:27,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:45:27,360 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:27,545 INFO L93 Difference]: Finished difference Result 129 states and 159 transitions. [2021-08-26 07:45:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:45:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-26 07:45:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:27,546 INFO L225 Difference]: With dead ends: 129 [2021-08-26 07:45:27,546 INFO L226 Difference]: Without dead ends: 101 [2021-08-26 07:45:27,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:45:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-26 07:45:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2021-08-26 07:45:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-08-26 07:45:27,554 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 22 [2021-08-26 07:45:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:27,555 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-08-26 07:45:27,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-08-26 07:45:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 07:45:27,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:27,555 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:27,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-26 07:45:27,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 07:45:27,762 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash -275964616, now seen corresponding path program 3 times [2021-08-26 07:45:27,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:27,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227978993] [2021-08-26 07:45:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:27,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:27,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:27,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759123326] [2021-08-26 07:45:27,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 07:45:27,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:27,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:27,769 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:27,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 07:45:28,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 07:45:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:45:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 07:45:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 07:45:28,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:28,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227978993] [2021-08-26 07:45:28,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:28,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759123326] [2021-08-26 07:45:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759123326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:45:28,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:45:28,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 07:45:28,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819484208] [2021-08-26 07:45:28,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:45:28,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:45:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:45:28,564 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:32,278 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2021-08-26 07:45:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:45:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-26 07:45:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:32,279 INFO L225 Difference]: With dead ends: 106 [2021-08-26 07:45:32,279 INFO L226 Difference]: Without dead ends: 104 [2021-08-26 07:45:32,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:45:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-26 07:45:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 58. [2021-08-26 07:45:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-08-26 07:45:32,289 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 23 [2021-08-26 07:45:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:32,289 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-08-26 07:45:32,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-08-26 07:45:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 07:45:32,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:32,290 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:32,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:32,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:32,497 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1052333562, now seen corresponding path program 1 times [2021-08-26 07:45:32,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:32,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937198205] [2021-08-26 07:45:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:32,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:32,502 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:32,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941343176] [2021-08-26 07:45:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:32,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:32,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:32,507 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:32,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 07:45:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:45:33,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 07:45:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:45:33,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:33,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937198205] [2021-08-26 07:45:33,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:33,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941343176] [2021-08-26 07:45:33,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941343176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:45:33,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:45:33,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 07:45:33,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787993969] [2021-08-26 07:45:33,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 07:45:33,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 07:45:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-26 07:45:33,942 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:41,974 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2021-08-26 07:45:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 07:45:41,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 07:45:41,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:41,975 INFO L225 Difference]: With dead ends: 132 [2021-08-26 07:45:41,975 INFO L226 Difference]: Without dead ends: 130 [2021-08-26 07:45:41,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3468.3ms TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2021-08-26 07:45:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-26 07:45:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 87. [2021-08-26 07:45:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 86 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2021-08-26 07:45:41,985 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 24 [2021-08-26 07:45:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:41,985 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2021-08-26 07:45:41,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2021-08-26 07:45:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 07:45:41,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:41,986 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:42,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:42,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:42,189 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1639827719, now seen corresponding path program 1 times [2021-08-26 07:45:42,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:42,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190146054] [2021-08-26 07:45:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:42,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:42,197 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:42,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993998599] [2021-08-26 07:45:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:42,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:42,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:42,198 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:42,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 07:45:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:45:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 07:45:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 07:45:42,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:42,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190146054] [2021-08-26 07:45:42,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:42,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993998599] [2021-08-26 07:45:42,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993998599] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:45:42,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:45:42,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 07:45:42,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444148618] [2021-08-26 07:45:42,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:45:42,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:45:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:45:42,935 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:43,046 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2021-08-26 07:45:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:45:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-26 07:45:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:43,047 INFO L225 Difference]: With dead ends: 96 [2021-08-26 07:45:43,047 INFO L226 Difference]: Without dead ends: 90 [2021-08-26 07:45:43,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:45:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-26 07:45:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-08-26 07:45:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 83 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-08-26 07:45:43,056 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 26 [2021-08-26 07:45:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:43,057 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-08-26 07:45:43,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-08-26 07:45:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 07:45:43,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:43,057 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:43,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:43,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-26 07:45:43,265 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1975081207, now seen corresponding path program 1 times [2021-08-26 07:45:43,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:43,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310950567] [2021-08-26 07:45:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:43,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:43,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:43,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338561518] [2021-08-26 07:45:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:43,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:43,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:43,287 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:43,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 07:45:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:45:43,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 07:45:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 07:45:44,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:44,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310950567] [2021-08-26 07:45:44,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:44,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338561518] [2021-08-26 07:45:44,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338561518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:45:44,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:45:44,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 07:45:44,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484029879] [2021-08-26 07:45:44,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 07:45:44,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 07:45:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:45:44,170 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:44,491 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2021-08-26 07:45:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:45:44,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-26 07:45:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:44,492 INFO L225 Difference]: With dead ends: 88 [2021-08-26 07:45:44,492 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 07:45:44,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-08-26 07:45:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 07:45:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-08-26 07:45:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.295774647887324) internal successors, (92), 71 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-08-26 07:45:44,501 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 26 [2021-08-26 07:45:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:44,501 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-08-26 07:45:44,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-08-26 07:45:44,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 07:45:44,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:44,502 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:44,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:44,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 07:45:44,706 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:44,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1588979411, now seen corresponding path program 2 times [2021-08-26 07:45:44,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:44,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140490896] [2021-08-26 07:45:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:44,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:44,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:44,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57272713] [2021-08-26 07:45:44,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:45:44,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:44,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:44,717 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:44,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 07:45:45,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 07:45:45,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:45:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 07:45:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-26 07:45:45,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:45,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140490896] [2021-08-26 07:45:45,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:45,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57272713] [2021-08-26 07:45:45,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57272713] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:45:45,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:45:45,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 07:45:45,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376130113] [2021-08-26 07:45:45,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:45:45,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:45:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:45:45,751 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:50,451 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2021-08-26 07:45:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:45:50,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-26 07:45:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:50,452 INFO L225 Difference]: With dead ends: 100 [2021-08-26 07:45:50,452 INFO L226 Difference]: Without dead ends: 96 [2021-08-26 07:45:50,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:45:50,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-26 07:45:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2021-08-26 07:45:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 82 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2021-08-26 07:45:50,488 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 26 [2021-08-26 07:45:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:50,488 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2021-08-26 07:45:50,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2021-08-26 07:45:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 07:45:50,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:45:50,489 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:45:50,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:50,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 07:45:50,689 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:45:50,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:45:50,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2017185649, now seen corresponding path program 2 times [2021-08-26 07:45:50,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:45:50,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581761647] [2021-08-26 07:45:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:45:50,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:45:50,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:45:50,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422824979] [2021-08-26 07:45:50,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:45:50,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:45:50,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:45:50,697 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:45:50,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 07:45:51,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 07:45:51,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:45:51,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 07:45:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:45:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-26 07:45:51,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:45:51,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581761647] [2021-08-26 07:45:51,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:45:51,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422824979] [2021-08-26 07:45:51,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422824979] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:45:51,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:45:51,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 07:45:51,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272491508] [2021-08-26 07:45:51,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:45:51,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:45:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:45:51,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:45:51,741 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:45:58,460 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2021-08-26 07:45:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 07:45:58,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 07:45:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:45:58,461 INFO L225 Difference]: With dead ends: 83 [2021-08-26 07:45:58,461 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 07:45:58,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:45:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 07:45:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 07:45:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 07:45:58,462 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-08-26 07:45:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:45:58,462 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 07:45:58,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:45:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 07:45:58,462 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 07:45:58,464 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:45:58,464 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:45:58,464 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:45:58,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 07:45:58,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 07:45:58,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 07:45:58,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:45:58,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:45:58,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:45:58,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:45:59,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:46:49,736 WARN L207 SmtUtils]: Spent 50.46 s on a formula simplification. DAG size of input: 232 DAG size of output: 34 [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point L44(lines 44 54) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 54) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 37 38) the Hoare annotation is: (let ((.cse0 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (and (= ULTIMATE.start_assume_abort_if_not_~cond 1) (<= 0 ULTIMATE.start_main_~b~0) (= .cse0 (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0))) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< 0 (+ ULTIMATE.start_main_~a~0 1)) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 10) (or (= (mod (+ .cse0 (* ULTIMATE.start_main_~q~0 (- 1))) (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) 0) (= ULTIMATE.start_main_~q~0 .cse0)) (<= ULTIMATE.start_main_~y~0 10) (<= 0 ULTIMATE.start_main_~x~0))) [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-08-26 07:46:54,474 INFO L857 garLoopResultBuilder]: For program point L8-1(lines 8 10) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L853 garLoopResultBuilder]: At program point L12-5(lines 11 17) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start_main_~y~0)) (.cse2 (<= ULTIMATE.start_main_~x~0 10)) (.cse3 (<= ULTIMATE.start_main_~y~0 10)) (.cse4 (<= 0 ULTIMATE.start_main_~x~0))) (or (and (= ULTIMATE.start_main_~a~0 0) .cse0 .cse1 (<= 1 ULTIMATE.start_main_~b~0) .cse2 .cse3 .cse4) (and .cse0 (= ULTIMATE.start_main_~b~0 0) (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0))) .cse1 .cse2 .cse3 (<= 0 ULTIMATE.start_main_~a~0) .cse4))) [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L8-2(lines 8 10) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L860 garLoopResultBuilder]: At program point L12-8(lines 11 17) the Hoare annotation is: true [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L9-2(line 9) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L9-4(line 9) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L34-2(lines 34 55) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L860 garLoopResultBuilder]: At program point L59(lines 19 60) the Hoare annotation is: true [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-26 07:46:54,475 INFO L857 garLoopResultBuilder]: For program point L47(lines 47 54) no Hoare annotation was computed. [2021-08-26 07:46:54,476 INFO L853 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0)))) (.cse2 (<= ULTIMATE.start_main_~x~0 10)) (.cse3 (<= ULTIMATE.start_main_~y~0 10)) (.cse4 (<= 0 ULTIMATE.start_main_~x~0))) (or (and .cse0 (<= 0 ULTIMATE.start_main_~b~0) .cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~y~0) .cse2 .cse3 (<= 0 ULTIMATE.start_main_~a~0) .cse4) (and .cse0 .cse1 (= ULTIMATE.start_main_~p~0 1) (<= 1 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~q~0 0) .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)))) [2021-08-26 07:46:54,478 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:46:54,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:46:54 BoogieIcfgContainer [2021-08-26 07:46:54,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:46:54,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:46:54,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:46:54,496 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:46:54,496 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:41:43" (3/4) ... [2021-08-26 07:46:54,498 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 07:46:54,504 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-26 07:46:54,504 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 07:46:54,504 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 07:46:54,505 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 07:46:54,527 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:46:54,527 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:46:54,528 INFO L168 Benchmark]: Toolchain (without parser) took 312050.51 ms. Allocated memory was 46.1 MB in the beginning and 211.8 MB in the end (delta: 165.7 MB). Free memory was 22.3 MB in the beginning and 50.3 MB in the end (delta: -28.0 MB). Peak memory consumption was 138.4 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:54,528 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory was 28.4 MB in the beginning and 28.3 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:46:54,528 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.16 ms. Allocated memory is still 56.6 MB. Free memory was 41.7 MB in the beginning and 31.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:54,528 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.29 ms. Allocated memory is still 56.6 MB. Free memory was 31.7 MB in the beginning and 39.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:54,528 INFO L168 Benchmark]: Boogie Preprocessor took 12.60 ms. Allocated memory is still 56.6 MB. Free memory was 39.7 MB in the beginning and 38.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:46:54,529 INFO L168 Benchmark]: RCFGBuilder took 336.11 ms. Allocated memory is still 56.6 MB. Free memory was 38.4 MB in the beginning and 36.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:54,529 INFO L168 Benchmark]: TraceAbstraction took 311475.05 ms. Allocated memory was 56.6 MB in the beginning and 211.8 MB in the end (delta: 155.2 MB). Free memory was 35.7 MB in the beginning and 53.7 MB in the end (delta: -18.0 MB). Peak memory consumption was 163.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:54,529 INFO L168 Benchmark]: Witness Printer took 31.54 ms. Allocated memory is still 211.8 MB. Free memory was 53.7 MB in the beginning and 50.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:54,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory was 28.4 MB in the beginning and 28.3 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 145.16 ms. Allocated memory is still 56.6 MB. Free memory was 41.7 MB in the beginning and 31.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.29 ms. Allocated memory is still 56.6 MB. Free memory was 31.7 MB in the beginning and 39.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.60 ms. Allocated memory is still 56.6 MB. Free memory was 39.7 MB in the beginning and 38.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 336.11 ms. Allocated memory is still 56.6 MB. Free memory was 38.4 MB in the beginning and 36.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 311475.05 ms. Allocated memory was 56.6 MB in the beginning and 211.8 MB in the end (delta: 155.2 MB). Free memory was 35.7 MB in the beginning and 53.7 MB in the end (delta: -18.0 MB). Peak memory consumption was 163.1 MB. Max. memory is 16.1 GB. * Witness Printer took 31.54 ms. Allocated memory is still 211.8 MB. Free memory was 53.7 MB in the beginning and 50.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 311407.1ms, OverallIterations: 28, TraceHistogramMax: 4, EmptinessCheckTime: 17.3ms, AutomataDifference: 153130.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 55808.5ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 453 SDtfs, 1837 SDslu, 1183 SDs, 0 SdLazy, 2861 SolverSat, 612 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 53012.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 678 GetRequests, 344 SyntacticMatches, 3 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 117753.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=24, InterpolantAutomatonStates: 280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 187.5ms AutomataMinimizationTime, 28 MinimizatonAttempts, 365 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 38 NumberOfFragments, 184 HoareAnnotationTreeSize, 5 FomulaSimplifications, 52667601 FormulaSimplificationTreeSizeReduction, 610.5ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 22662 FormulaSimplificationTreeSizeReductionInter, 55191.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 122.0ms SsaConstructionTime, 546.3ms SatisfiabilityAnalysisTime, 87410.3ms InterpolantComputationTime, 555 NumberOfCodeBlocks, 525 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 527 ConstructedInterpolants, 7 QuantifiedInterpolants, 6179 SizeOfPredicates, 247 NumberOfNonLiveVariables, 2540 ConjunctsInSsa, 630 ConjunctsInUnsatCore, 28 InterpolantComputations, 11 PerfectInterpolantSequences, 94/184 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((cond == 1 && 0 <= b) && x * y == q + a * p * b) && 1 == cond) && 0 < a + 1) && 1 <= y) && x <= 10) && ((x * y + q * -1) % (a * b) == 0 || q == x * y)) && y <= 10) && 0 <= x - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((cond == 1 && 0 <= b) && x * y == q + a * p * b) && 1 == cond) && 1 <= y) && x <= 10) && y <= 10) && 0 <= a) && 0 <= x) || ((((((((cond == 1 && x * y == q + a * p * b) && p == 1) && 1 <= b) && q == 0) && x <= 10) && y <= 10) && 0 <= x) && b == y) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((((a == 0 && cond == 1) && 1 <= y) && 1 <= b) && x <= 10) && y <= 10) && 0 <= x) || (((((((cond == 1 && b == 0) && x * y == q + a * p * b) && 1 <= y) && x <= 10) && y <= 10) && 0 <= a) && 0 <= x) RESULT: Ultimate proved your program to be correct! [2021-08-26 07:46:54,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...