./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.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 40c004ecbeb3948e318f4c5fc8011bd289b059bb9dbb2959c45853a9680cf20f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 12:05:26,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 12:05:26,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 12:05:26,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 12:05:26,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 12:05:26,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 12:05:26,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 12:05:26,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 12:05:26,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 12:05:26,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 12:05:26,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 12:05:26,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 12:05:26,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 12:05:26,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 12:05:26,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 12:05:26,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 12:05:26,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 12:05:26,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 12:05:26,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 12:05:26,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 12:05:26,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 12:05:26,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 12:05:26,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 12:05:26,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 12:05:26,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 12:05:26,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 12:05:26,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 12:05:26,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 12:05:26,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 12:05:26,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 12:05:26,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 12:05:26,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 12:05:26,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 12:05:26,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 12:05:26,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 12:05:26,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 12:05:26,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 12:05:26,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 12:05:26,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 12:05:26,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 12:05:26,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 12:05:26,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 12:05:26,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 12:05:26,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 12:05:26,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 12:05:26,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 12:05:26,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 12:05:26,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 12:05:26,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 12:05:26,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 12:05:26,742 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 12:05:26,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 12:05:26,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 12:05:26,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 12:05:26,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 12:05:26,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 12:05:26,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 12:05:26,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 12:05:26,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 12:05:26,744 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 12:05:26,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 12:05:26,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 12:05:26,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 12:05:26,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 12:05:26,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 12:05:26,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 12:05:26,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:05:26,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 12:05:26,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 12:05:26,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 12:05:26,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 12:05:26,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 12:05:26,747 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 12:05:26,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 12:05:26,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 12:05:26,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 12:05:26,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40c004ecbeb3948e318f4c5fc8011bd289b059bb9dbb2959c45853a9680cf20f [2021-12-17 12:05:26,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 12:05:26,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 12:05:26,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 12:05:26,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 12:05:26,943 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 12:05:26,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-12-17 12:05:26,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab565271/126ad63ca35e44efac27970f07f70323/FLAG483cda4f8 [2021-12-17 12:05:27,354 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 12:05:27,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-12-17 12:05:27,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab565271/126ad63ca35e44efac27970f07f70323/FLAG483cda4f8 [2021-12-17 12:05:27,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab565271/126ad63ca35e44efac27970f07f70323 [2021-12-17 12:05:27,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 12:05:27,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 12:05:27,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 12:05:27,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 12:05:27,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 12:05:27,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:05:27" (1/1) ... [2021-12-17 12:05:27,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b55edf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:27, skipping insertion in model container [2021-12-17 12:05:27,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:05:27" (1/1) ... [2021-12-17 12:05:27,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 12:05:27,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 12:05:27,937 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2021-12-17 12:05:27,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:05:27,985 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 12:05:27,994 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2021-12-17 12:05:28,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:05:28,015 INFO L208 MainTranslator]: Completed translation [2021-12-17 12:05:28,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28 WrapperNode [2021-12-17 12:05:28,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 12:05:28,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 12:05:28,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 12:05:28,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 12:05:28,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,049 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-17 12:05:28,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 12:05:28,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 12:05:28,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 12:05:28,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 12:05:28,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 12:05:28,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 12:05:28,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 12:05:28,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 12:05:28,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (1/1) ... [2021-12-17 12:05:28,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:05:28,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:28,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 12:05:28,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 12:05:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 12:05:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 12:05:28,146 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 12:05:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 12:05:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 12:05:28,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 12:05:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 12:05:28,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 12:05:28,185 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 12:05:28,186 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 12:05:28,308 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 12:05:28,323 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 12:05:28,324 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 12:05:28,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:05:28 BoogieIcfgContainer [2021-12-17 12:05:28,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 12:05:28,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 12:05:28,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 12:05:28,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 12:05:28,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:05:27" (1/3) ... [2021-12-17 12:05:28,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c40a810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:05:28, skipping insertion in model container [2021-12-17 12:05:28,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:28" (2/3) ... [2021-12-17 12:05:28,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c40a810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:05:28, skipping insertion in model container [2021-12-17 12:05:28,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:05:28" (3/3) ... [2021-12-17 12:05:28,334 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2021-12-17 12:05:28,338 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 12:05:28,338 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 12:05:28,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 12:05:28,378 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 12:05:28,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 12:05:28,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 12:05:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 12:05:28,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:28,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:28,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:28,401 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-12-17 12:05:28,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:28,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729736561] [2021-12-17 12:05:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:28,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 12:05:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:28,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 12:05:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:28,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 12:05:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:28,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 12:05:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:05:28,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:28,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729736561] [2021-12-17 12:05:28,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729736561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:05:28,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:05:28,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 12:05:28,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252246841] [2021-12-17 12:05:28,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:28,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 12:05:28,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 12:05:28,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:05:28,620 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:05:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:28,640 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-12-17 12:05:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 12:05:28,641 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-17 12:05:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:28,646 INFO L225 Difference]: With dead ends: 67 [2021-12-17 12:05:28,646 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 12:05:28,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:05:28,653 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:28,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:05:28,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 12:05:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-17 12:05:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 12:05:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-12-17 12:05:28,691 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-12-17 12:05:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:28,692 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-12-17 12:05:28,692 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:05:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-12-17 12:05:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 12:05:28,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:28,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:28,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 12:05:28,695 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:28,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-12-17 12:05:28,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:28,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182544677] [2021-12-17 12:05:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:28,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:28,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:28,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061132828] [2021-12-17 12:05:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:28,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:28,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:28,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:28,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 12:05:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:05:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 12:05:28,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:05:28,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:28,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182544677] [2021-12-17 12:05:28,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:28,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061132828] [2021-12-17 12:05:28,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061132828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:05:28,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:05:28,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 12:05:28,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518011374] [2021-12-17 12:05:28,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:28,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 12:05:28,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:28,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 12:05:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:05:28,921 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:05:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:28,978 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-12-17 12:05:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:05:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-17 12:05:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:28,980 INFO L225 Difference]: With dead ends: 50 [2021-12-17 12:05:28,980 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 12:05:28,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 12:05:28,981 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:28,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:05:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 12:05:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-17 12:05:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 12:05:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-17 12:05:28,987 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-12-17 12:05:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:28,988 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-17 12:05:28,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:05:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-17 12:05:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 12:05:28,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:28,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:29,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:29,205 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 [2021-12-17 12:05:29,206 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:29,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-12-17 12:05:29,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:29,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741578689] [2021-12-17 12:05:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:29,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:29,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:29,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782801619] [2021-12-17 12:05:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:29,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:29,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:29,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 12:05:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:29,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 12:05:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 12:05:29,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:05:29,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741578689] [2021-12-17 12:05:29,677 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782801619] [2021-12-17 12:05:29,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782801619] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:05:29,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:05:29,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2021-12-17 12:05:29,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222016355] [2021-12-17 12:05:29,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:29,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 12:05:29,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 12:05:29,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-17 12:05:29,679 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:05:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:29,717 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-12-17 12:05:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 12:05:29,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-17 12:05:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:29,718 INFO L225 Difference]: With dead ends: 49 [2021-12-17 12:05:29,718 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 12:05:29,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-17 12:05:29,719 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:29,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:05:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 12:05:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-17 12:05:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 12:05:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-17 12:05:29,725 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-12-17 12:05:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:29,725 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-17 12:05:29,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:05:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-17 12:05:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 12:05:29,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:29,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:29,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 12:05:29,943 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 [2021-12-17 12:05:29,943 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-12-17 12:05:29,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284945900] [2021-12-17 12:05:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:29,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:29,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:29,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864846735] [2021-12-17 12:05:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:29,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:29,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:29,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:29,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 12:05:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 12:05:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 12:05:30,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 12:05:30,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284945900] [2021-12-17 12:05:30,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864846735] [2021-12-17 12:05:30,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864846735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:30,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:30,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-17 12:05:30,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847549336] [2021-12-17 12:05:30,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:30,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 12:05:30,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 12:05:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 12:05:30,149 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:05:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:30,270 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-12-17 12:05:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 12:05:30,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-12-17 12:05:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:30,273 INFO L225 Difference]: With dead ends: 99 [2021-12-17 12:05:30,274 INFO L226 Difference]: Without dead ends: 92 [2021-12-17 12:05:30,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-17 12:05:30,275 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:30,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 308 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:05:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-17 12:05:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-12-17 12:05:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 12:05:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-12-17 12:05:30,288 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-12-17 12:05:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:30,288 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-12-17 12:05:30,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:05:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-12-17 12:05:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 12:05:30,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:30,289 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:30,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:30,503 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 [2021-12-17 12:05:30,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-12-17 12:05:30,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:30,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492243110] [2021-12-17 12:05:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:30,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:30,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:30,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089017412] [2021-12-17 12:05:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:30,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:30,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:30,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:30,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 12:05:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 12:05:30,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 12:05:30,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:05:30,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:30,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492243110] [2021-12-17 12:05:30,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:30,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089017412] [2021-12-17 12:05:30,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089017412] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:05:30,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:05:30,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2021-12-17 12:05:30,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457161301] [2021-12-17 12:05:30,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:30,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 12:05:30,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 12:05:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-17 12:05:30,897 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 12:05:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:30,947 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-12-17 12:05:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:05:30,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-12-17 12:05:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:30,950 INFO L225 Difference]: With dead ends: 75 [2021-12-17 12:05:30,950 INFO L226 Difference]: Without dead ends: 73 [2021-12-17 12:05:30,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-17 12:05:30,951 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:30,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 172 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:05:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-17 12:05:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-17 12:05:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 12:05:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-12-17 12:05:30,974 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-12-17 12:05:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:30,975 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-12-17 12:05:30,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 12:05:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-12-17 12:05:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 12:05:30,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:30,976 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:30,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 12:05:31,189 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 [2021-12-17 12:05:31,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:31,190 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-12-17 12:05:31,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:31,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571669676] [2021-12-17 12:05:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:31,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:31,198 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:31,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842245003] [2021-12-17 12:05:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:31,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:31,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:31,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:31,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 12:05:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 12:05:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 12:05:31,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 12:05:31,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:31,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571669676] [2021-12-17 12:05:31,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:31,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842245003] [2021-12-17 12:05:31,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842245003] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:31,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:31,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-17 12:05:31,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207719503] [2021-12-17 12:05:31,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:31,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 12:05:31,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 12:05:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-17 12:05:31,476 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 12:05:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:31,606 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2021-12-17 12:05:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 12:05:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 38 [2021-12-17 12:05:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:31,607 INFO L225 Difference]: With dead ends: 98 [2021-12-17 12:05:31,607 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 12:05:31,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-17 12:05:31,608 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:31,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 257 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:05:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 12:05:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2021-12-17 12:05:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 12:05:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-12-17 12:05:31,613 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 38 [2021-12-17 12:05:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:31,614 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-12-17 12:05:31,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 12:05:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-12-17 12:05:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 12:05:31,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:31,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:31,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 12:05:31,827 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 [2021-12-17 12:05:31,827 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-12-17 12:05:31,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:31,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399544760] [2021-12-17 12:05:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:31,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:31,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:31,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728674325] [2021-12-17 12:05:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:31,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:31,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:31,836 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:31,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 12:05:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:31,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:05:31,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 12:05:31,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:05:31,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:31,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399544760] [2021-12-17 12:05:31,941 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:31,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728674325] [2021-12-17 12:05:31,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728674325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:05:31,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:05:31,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:05:31,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710145366] [2021-12-17 12:05:31,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:31,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:05:31,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:05:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:05:31,943 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:05:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:31,973 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-12-17 12:05:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:05:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-17 12:05:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:31,974 INFO L225 Difference]: With dead ends: 75 [2021-12-17 12:05:31,974 INFO L226 Difference]: Without dead ends: 73 [2021-12-17 12:05:31,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:05:31,975 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:31,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 141 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:05:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-17 12:05:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-12-17 12:05:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 44 states have internal predecessors, (52), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 12:05:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2021-12-17 12:05:31,981 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 43 [2021-12-17 12:05:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:31,981 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2021-12-17 12:05:31,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:05:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2021-12-17 12:05:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 12:05:31,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:31,982 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:32,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:32,198 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 [2021-12-17 12:05:32,198 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:32,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-12-17 12:05:32,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:32,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886417017] [2021-12-17 12:05:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:32,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:32,206 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:32,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186678572] [2021-12-17 12:05:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:32,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:32,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:32,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:32,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 12:05:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:32,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 12:05:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:05:32,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 12:05:32,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886417017] [2021-12-17 12:05:32,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186678572] [2021-12-17 12:05:32,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186678572] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:05:32,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:05:32,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2021-12-17 12:05:32,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688470642] [2021-12-17 12:05:32,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:32,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:05:32,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:05:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 12:05:32,513 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 12:05:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:32,606 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2021-12-17 12:05:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:05:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-17 12:05:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:32,608 INFO L225 Difference]: With dead ends: 77 [2021-12-17 12:05:32,608 INFO L226 Difference]: Without dead ends: 75 [2021-12-17 12:05:32,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-17 12:05:32,608 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:32,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:05:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-17 12:05:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-12-17 12:05:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 12:05:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2021-12-17 12:05:32,620 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 48 [2021-12-17 12:05:32,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:32,621 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2021-12-17 12:05:32,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 12:05:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2021-12-17 12:05:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 12:05:32,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:32,625 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:32,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:32,839 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 [2021-12-17 12:05:32,839 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-12-17 12:05:32,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:32,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227741014] [2021-12-17 12:05:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:32,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:32,846 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:32,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605382073] [2021-12-17 12:05:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:32,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:32,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:32,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:32,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 12:05:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:32,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 12:05:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 12:05:33,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 12:05:34,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227741014] [2021-12-17 12:05:34,347 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605382073] [2021-12-17 12:05:34,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605382073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:34,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:34,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-12-17 12:05:34,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167630214] [2021-12-17 12:05:34,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:34,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 12:05:34,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 12:05:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-17 12:05:34,349 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 12:05:46,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:05:47,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:05:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:48,819 INFO L93 Difference]: Finished difference Result 287 states and 422 transitions. [2021-12-17 12:05:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 12:05:48,820 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2021-12-17 12:05:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:48,822 INFO L225 Difference]: With dead ends: 287 [2021-12-17 12:05:48,823 INFO L226 Difference]: Without dead ends: 250 [2021-12-17 12:05:48,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=590, Invalid=2950, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 12:05:48,824 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 224 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:48,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 591 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-12-17 12:05:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-17 12:05:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 169. [2021-12-17 12:05:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 107 states have internal predecessors, (132), 55 states have call successors, (55), 8 states have call predecessors, (55), 8 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-12-17 12:05:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 240 transitions. [2021-12-17 12:05:48,846 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 240 transitions. Word has length 60 [2021-12-17 12:05:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:48,846 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 240 transitions. [2021-12-17 12:05:48,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 12:05:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 240 transitions. [2021-12-17 12:05:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 12:05:48,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:48,848 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:48,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:49,063 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 [2021-12-17 12:05:49,064 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:49,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2000413383, now seen corresponding path program 2 times [2021-12-17 12:05:49,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:49,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187594626] [2021-12-17 12:05:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:49,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:49,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:49,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692084752] [2021-12-17 12:05:49,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 12:05:49,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:49,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:49,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:49,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 12:05:49,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 12:05:49,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:05:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:05:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 12:05:49,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 12:05:49,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187594626] [2021-12-17 12:05:49,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692084752] [2021-12-17 12:05:49,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692084752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:49,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:49,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-17 12:05:49,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983481122] [2021-12-17 12:05:49,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:49,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 12:05:49,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 12:05:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-17 12:05:49,373 INFO L87 Difference]: Start difference. First operand 169 states and 240 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 12:05:49,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:49,610 INFO L93 Difference]: Finished difference Result 276 states and 386 transitions. [2021-12-17 12:05:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 12:05:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 65 [2021-12-17 12:05:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:49,611 INFO L225 Difference]: With dead ends: 276 [2021-12-17 12:05:49,611 INFO L226 Difference]: Without dead ends: 191 [2021-12-17 12:05:49,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-12-17 12:05:49,612 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 55 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:49,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 292 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:05:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-17 12:05:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 173. [2021-12-17 12:05:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 108 states have internal predecessors, (127), 57 states have call successors, (57), 8 states have call predecessors, (57), 8 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-17 12:05:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 240 transitions. [2021-12-17 12:05:49,632 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 240 transitions. Word has length 65 [2021-12-17 12:05:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:49,633 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 240 transitions. [2021-12-17 12:05:49,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 12:05:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 240 transitions. [2021-12-17 12:05:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 12:05:49,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:49,642 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:49,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:49,878 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 [2021-12-17 12:05:49,879 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1382204855, now seen corresponding path program 1 times [2021-12-17 12:05:49,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:49,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139878733] [2021-12-17 12:05:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:49,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:49,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:49,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393118980] [2021-12-17 12:05:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:49,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:49,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:49,916 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:49,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 12:05:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:49,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 12:05:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 12:05:50,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-17 12:05:50,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139878733] [2021-12-17 12:05:50,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393118980] [2021-12-17 12:05:50,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393118980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:50,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:50,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-12-17 12:05:50,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580827837] [2021-12-17 12:05:50,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:50,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 12:05:50,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:50,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 12:05:50,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-12-17 12:05:50,356 INFO L87 Difference]: Start difference. First operand 173 states and 240 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-17 12:05:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:50,504 INFO L93 Difference]: Finished difference Result 206 states and 279 transitions. [2021-12-17 12:05:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 12:05:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 68 [2021-12-17 12:05:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:50,505 INFO L225 Difference]: With dead ends: 206 [2021-12-17 12:05:50,505 INFO L226 Difference]: Without dead ends: 65 [2021-12-17 12:05:50,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-12-17 12:05:50,506 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:50,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 262 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:05:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-17 12:05:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-12-17 12:05:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 12:05:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-12-17 12:05:50,524 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 68 [2021-12-17 12:05:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:50,524 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-12-17 12:05:50,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-17 12:05:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-12-17 12:05:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-17 12:05:50,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:50,525 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:50,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:50,739 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 [2021-12-17 12:05:50,739 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2021-12-17 12:05:50,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:50,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21482734] [2021-12-17 12:05:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:50,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:50,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055484342] [2021-12-17 12:05:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:50,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:50,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:50,749 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:50,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 12:05:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:50,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 12:05:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 12:05:51,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-17 12:05:51,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:51,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21482734] [2021-12-17 12:05:51,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:51,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055484342] [2021-12-17 12:05:51,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055484342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:51,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:51,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-17 12:05:51,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066560581] [2021-12-17 12:05:51,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:51,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 12:05:51,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 12:05:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-12-17 12:05:51,209 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-17 12:05:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:51,397 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-12-17 12:05:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 12:05:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 90 [2021-12-17 12:05:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:51,398 INFO L225 Difference]: With dead ends: 71 [2021-12-17 12:05:51,398 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 12:05:51,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-12-17 12:05:51,399 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:51,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 305 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:05:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 12:05:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 12:05:51,399 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) [2021-12-17 12:05:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 12:05:51,399 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2021-12-17 12:05:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:51,399 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 12:05:51,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-17 12:05:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 12:05:51,399 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 12:05:51,401 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 12:05:51,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:51,611 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 [2021-12-17 12:05:51,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 12:05:53,697 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (.cse2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse3 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse4 (<= 1 |ULTIMATE.start_main_~y~0#1|))) (or (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~a~0#1| .cse0) (<= |ULTIMATE.start_main_~a~0#1| 1) .cse1 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~b~0#1| (+ .cse2 .cse3)) (<= 1 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~s~0#1| 1) (<= |ULTIMATE.start_main_~b~0#1| 1) .cse4) (and (= .cse0 (+ .cse2 .cse3 |ULTIMATE.start_main_~a~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 1) (< (* 2 |ULTIMATE.start_main_~c~0#1|) 1) (<= |ULTIMATE.start_main_~y~0#1| 1) .cse1 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse4 (<= 0 |ULTIMATE.start_main_~b~0#1|)))) [2021-12-17 12:05:53,697 INFO L854 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (let ((.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse2 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse0 (+ .cse3 .cse4))) (and (= .cse0 (+ .cse1 .cse2 |ULTIMATE.start_main_~a~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 1) (or (<= |ULTIMATE.start_main_~b~0#1| (div |ULTIMATE.start_main_~c~0#1| 2)) (= (+ (* 2 .cse1) (* 2 .cse2) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|)) (+ .cse3 |ULTIMATE.start_main_~b~0#1| .cse4)) (not (= |ULTIMATE.start_main_~b~0#1| (+ .cse1 .cse2)))) (<= |ULTIMATE.start_main_~y~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (or (= |ULTIMATE.start_main_~a~0#1| .cse0) (< |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (= 0 |ULTIMATE.start_main_~b~0#1|)) (<= 1 |ULTIMATE.start_main_~y~0#1|)))) [2021-12-17 12:05:53,697 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)))) (.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse4 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse5 (<= |ULTIMATE.start_main_~a~0#1| 1)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse8 (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse10 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (= |ULTIMATE.start_main_~v~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (<= (* 2 |ULTIMATE.start_main_~v~0#1|) |ULTIMATE.start_main_~c~0#1|) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 (= |ULTIMATE.start_main_~d~0#1| 1) .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11))) [2021-12-17 12:05:53,697 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-12-17 12:05:53,697 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 12:05:53,697 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 12:05:53,697 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 12:05:53,697 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~x~0#1| 1) (<= 0 |ULTIMATE.start_main_~x~0#1|)) [2021-12-17 12:05:53,697 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~x~0#1| 1) (<= |ULTIMATE.start_main_~y~0#1| 1) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|)) [2021-12-17 12:05:53,697 INFO L858 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-12-17 12:05:53,697 INFO L854 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)))) (.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse4 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse5 (<= |ULTIMATE.start_main_~a~0#1| 1)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse8 (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse10 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (= |ULTIMATE.start_main_~v~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (<= (* 2 |ULTIMATE.start_main_~v~0#1|) |ULTIMATE.start_main_~c~0#1|) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 (= |ULTIMATE.start_main_~d~0#1| 1) .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11))) [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~x~0#1| 1) (<= |ULTIMATE.start_main_~y~0#1| 1) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|)) [2021-12-17 12:05:53,698 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)))) (.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse4 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse5 (<= |ULTIMATE.start_main_~a~0#1| 1)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse8 (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse10 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (= |ULTIMATE.start_main_~v~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (<= (* 2 |ULTIMATE.start_main_~v~0#1|) |ULTIMATE.start_main_~c~0#1|) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 (= |ULTIMATE.start_main_~d~0#1| 1) .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11))) [2021-12-17 12:05:53,698 INFO L854 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)))) (.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse4 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse5 (<= |ULTIMATE.start_main_~a~0#1| 1)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse8 (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse10 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (= |ULTIMATE.start_main_~v~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (<= (* 2 |ULTIMATE.start_main_~v~0#1|) |ULTIMATE.start_main_~c~0#1|) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 (= |ULTIMATE.start_main_~d~0#1| 1) .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11))) [2021-12-17 12:05:53,698 INFO L861 garLoopResultBuilder]: At program point L75(lines 18 76) the Hoare annotation is: true [2021-12-17 12:05:53,698 INFO L854 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse2 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (let ((.cse6 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse7 (= |ULTIMATE.start_main_~a~0#1| (+ .cse3 .cse4))) (.cse9 (<= |ULTIMATE.start_main_~a~0#1| 1)) (.cse10 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse0 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse5 (= |ULTIMATE.start_main_~b~0#1| (+ .cse1 .cse2))) (.cse11 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse12 (<= 1 |ULTIMATE.start_main_~y~0#1|))) (or (and (<= |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~b~0#1|) .cse0 (= (+ .cse1 .cse2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (+ .cse3 |ULTIMATE.start_main_~b~0#1| .cse4)) .cse5 (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= 0 |ULTIMATE.start_main_~c~0#1|) .cse6 .cse7 (let ((.cse8 (* |ULTIMATE.start_main_~c~0#1| (- 1)))) (< (div (+ .cse8 (- 1)) (- 2)) (+ (div (+ .cse8 2) 2) 1))) .cse9 .cse10 .cse11 (= |ULTIMATE.start_main_~v~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|)) .cse12) (and .cse6 .cse7 (= |ULTIMATE.start_main_~k~0#1| 0) .cse9 .cse10 .cse0 .cse5 .cse11 (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 1) (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse12)))) [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L854 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)))) (.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse4 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse5 (<= |ULTIMATE.start_main_~a~0#1| 1)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse8 (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse10 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (= |ULTIMATE.start_main_~v~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (<= (* 2 |ULTIMATE.start_main_~v~0#1|) |ULTIMATE.start_main_~c~0#1|) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 (= |ULTIMATE.start_main_~d~0#1| 1) .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11))) [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-17 12:05:53,698 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-12-17 12:05:53,699 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-12-17 12:05:53,699 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-12-17 12:05:53,699 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-12-17 12:05:53,700 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:53,701 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 12:05:53,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 12:05:53 BoogieIcfgContainer [2021-12-17 12:05:53,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 12:05:53,727 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 12:05:53,728 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 12:05:53,728 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 12:05:53,728 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:05:28" (3/4) ... [2021-12-17 12:05:53,730 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 12:05:53,733 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-17 12:05:53,734 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-17 12:05:53,737 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-17 12:05:53,737 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 12:05:53,737 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 12:05:53,738 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 12:05:53,784 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 12:05:53,784 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 12:05:53,785 INFO L158 Benchmark]: Toolchain (without parser) took 25982.54ms. Allocated memory was 86.0MB in the beginning and 132.1MB in the end (delta: 46.1MB). Free memory was 54.0MB in the beginning and 90.3MB in the end (delta: -36.3MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-12-17 12:05:53,785 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 86.0MB. Free memory is still 45.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 12:05:53,785 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.38ms. Allocated memory is still 86.0MB. Free memory was 53.7MB in the beginning and 62.5MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 12:05:53,785 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.33ms. Allocated memory is still 86.0MB. Free memory was 62.5MB in the beginning and 60.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 12:05:53,788 INFO L158 Benchmark]: Boogie Preprocessor took 31.33ms. Allocated memory is still 86.0MB. Free memory was 60.7MB in the beginning and 59.8MB in the end (delta: 845.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 12:05:53,788 INFO L158 Benchmark]: RCFGBuilder took 244.10ms. Allocated memory is still 86.0MB. Free memory was 59.5MB in the beginning and 49.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 12:05:53,788 INFO L158 Benchmark]: TraceAbstraction took 25400.58ms. Allocated memory was 86.0MB in the beginning and 132.1MB in the end (delta: 46.1MB). Free memory was 49.0MB in the beginning and 93.5MB in the end (delta: -44.4MB). Peak memory consumption was 66.5MB. Max. memory is 16.1GB. [2021-12-17 12:05:53,788 INFO L158 Benchmark]: Witness Printer took 56.87ms. Allocated memory is still 132.1MB. Free memory was 93.5MB in the beginning and 90.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 12:05:53,789 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 86.0MB. Free memory is still 45.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.38ms. Allocated memory is still 86.0MB. Free memory was 53.7MB in the beginning and 62.5MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.33ms. Allocated memory is still 86.0MB. Free memory was 62.5MB in the beginning and 60.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.33ms. Allocated memory is still 86.0MB. Free memory was 60.7MB in the beginning and 59.8MB in the end (delta: 845.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 244.10ms. Allocated memory is still 86.0MB. Free memory was 59.5MB in the beginning and 49.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 25400.58ms. Allocated memory was 86.0MB in the beginning and 132.1MB in the end (delta: 46.1MB). Free memory was 49.0MB in the beginning and 93.5MB in the end (delta: -44.4MB). Peak memory consumption was 66.5MB. Max. memory is 16.1GB. * Witness Printer took 56.87ms. Allocated memory is still 132.1MB. Free memory was 93.5MB in the beginning and 90.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: 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 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.3s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 15.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 564 SdHoareTripleChecker+Valid, 8.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 529 mSDsluCounter, 2832 SdHoareTripleChecker+Invalid, 8.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2341 mSDsCounter, 644 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2734 IncrementalHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 644 mSolverCounterUnsat, 491 mSDtfsCounter, 2734 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1099 GetRequests, 883 SyntacticMatches, 14 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=10, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 155 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 127 PreInvPairs, 149 NumberOfFragments, 913 HoareAnnotationTreeSize, 127 FomulaSimplifications, 398 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 2178 FormulaSimplificationTreeSizeReductionInter, 2.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 577 NumberOfCodeBlocks, 577 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1031 ConstructedInterpolants, 0 QuantifiedInterpolants, 4019 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1518 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 1142/1280 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 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((((((v <= b && r == 0) && y * s + x * q + y * k * s + k * x * q == x * p + b + y * r) && b == y * s + x * q) && 1 <= a) && 0 <= c) && b == y) && a == x * p + y * r) && (c * -1 + -1) / -2 < (c * -1 + 2) / 2 + 1) && a <= 1) && 1 <= x) && s == 1) && v == b * d) && 1 <= y) || (((((((((((b == y && a == x * p + y * r) && k == 0) && a <= 1) && 1 <= x) && r == 0) && b == y * s + x * q) && s == 1) && c == a) && b <= 1) && 1 <= c) && 1 <= y) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((((((((r == 0 && b == y * s + x * q) && b == y) && a == x * p + y * r) && k == 0) && 2 * v <= c) && a <= 1) && 1 <= x) && b <= c) && c == a) && s == 1) && 1 <= y) && v == b * d) || ((((((((((((r == 0 && b == y * s + x * q) && d == 1) && b == y) && a == x * p + y * r) && k == 0) && a <= 1) && 1 <= x) && b <= c) && c == a) && s == 1) && 1 <= y) && v == b * d) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((b == y && a == x * p + y * r) && a <= 1) && 1 <= x) && r == 0) && b == y * s + x * q) && 1 <= a) && s == 1) && b <= 1) && 1 <= y) || ((((((((x * p + y * r == y * s + x * q + a && x <= 1) && 2 * c < 1) && y <= 1) && 1 <= x) && b <= c) && b < a) && 1 <= y) && 0 <= b) RESULT: Ultimate proved your program to be correct! [2021-12-17 12:05:53,807 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE