./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 03d7b7b3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -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/prodbin-ll_valuebound20.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 a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 17:39:42,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 17:39:42,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 17:39:42,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 17:39:42,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 17:39:42,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 17:39:42,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 17:39:42,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 17:39:42,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 17:39:42,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 17:39:42,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 17:39:42,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 17:39:42,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 17:39:42,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 17:39:42,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 17:39:42,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 17:39:42,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 17:39:42,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 17:39:42,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 17:39:42,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 17:39:42,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 17:39:42,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 17:39:42,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 17:39:42,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 17:39:42,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 17:39:42,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 17:39:42,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 17:39:42,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 17:39:42,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 17:39:42,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 17:39:42,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 17:39:42,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 17:39:42,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 17:39:42,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 17:39:42,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 17:39:42,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 17:39:42,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 17:39:42,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 17:39:42,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 17:39:42,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 17:39:42,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 17:39:42,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-20 17:39:42,072 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 17:39:42,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 17:39:42,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 17:39:42,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 17:39:42,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 17:39:42,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 17:39:42,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 17:39:42,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 17:39:42,074 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 17:39:42,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 17:39:42,075 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 17:39:42,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 17:39:42,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 17:39:42,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 17:39:42,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 17:39:42,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 17:39:42,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 17:39:42,076 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 17:39:42,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 17:39:42,076 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 17:39:42,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 17:39:42,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 17:39:42,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 17:39:42,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 17:39:42,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:39:42,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 17:39:42,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 17:39:42,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 17:39:42,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 17:39:42,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 17:39:42,078 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 17:39:42,078 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 17:39:42,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 17:39:42,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 [2022-02-20 17:39:42,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 17:39:42,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 17:39:42,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 17:39:42,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 17:39:42,299 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 17:39:42,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-02-20 17:39:42,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7acc8d56/e0b56a8e4536453f91d84e92ac8372dd/FLAG6674bbd20 [2022-02-20 17:39:42,675 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 17:39:42,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-02-20 17:39:42,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7acc8d56/e0b56a8e4536453f91d84e92ac8372dd/FLAG6674bbd20 [2022-02-20 17:39:43,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7acc8d56/e0b56a8e4536453f91d84e92ac8372dd [2022-02-20 17:39:43,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 17:39:43,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 17:39:43,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 17:39:43,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 17:39:43,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 17:39:43,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56950609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43, skipping insertion in model container [2022-02-20 17:39:43,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 17:39:43,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 17:39:43,242 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/prodbin-ll_valuebound20.c[537,550] [2022-02-20 17:39:43,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 17:39:43,265 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 17:39:43,273 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/prodbin-ll_valuebound20.c[537,550] [2022-02-20 17:39:43,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 17:39:43,305 INFO L208 MainTranslator]: Completed translation [2022-02-20 17:39:43,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43 WrapperNode [2022-02-20 17:39:43,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 17:39:43,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 17:39:43,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 17:39:43,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 17:39:43,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,348 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-02-20 17:39:43,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 17:39:43,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 17:39:43,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 17:39:43,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 17:39:43,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 17:39:43,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 17:39:43,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 17:39:43,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 17:39:43,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (1/1) ... [2022-02-20 17:39:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:39:43,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:39:43,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-20 17:39:43,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-20 17:39:43,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 17:39:43,459 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-20 17:39:43,460 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-20 17:39:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-20 17:39:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 17:39:43,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 17:39:43,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-20 17:39:43,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-20 17:39:43,513 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 17:39:43,514 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 17:39:43,634 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 17:39:43,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 17:39:43,641 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 17:39:43,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 05:39:43 BoogieIcfgContainer [2022-02-20 17:39:43,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 17:39:43,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 17:39:43,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 17:39:43,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 17:39:43,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 05:39:43" (1/3) ... [2022-02-20 17:39:43,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433c2fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 05:39:43, skipping insertion in model container [2022-02-20 17:39:43,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:39:43" (2/3) ... [2022-02-20 17:39:43,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433c2fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 05:39:43, skipping insertion in model container [2022-02-20 17:39:43,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 05:39:43" (3/3) ... [2022-02-20 17:39:43,649 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2022-02-20 17:39:43,677 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 17:39:43,677 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-20 17:39:43,740 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 17:39:43,744 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 [2022-02-20 17:39:43,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-20 17:39:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-20 17:39:43,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:39:43,765 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:39:43,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:39:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:39:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2022-02-20 17:39:43,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 17:39:43,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424838902] [2022-02-20 17:39:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:39:43,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 17:39:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:43,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-20 17:39:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:43,946 INFO L290 TraceCheckUtils]: 0: Hoare triple {30#true} ~cond := #in~cond; {30#true} is VALID [2022-02-20 17:39:43,947 INFO L290 TraceCheckUtils]: 1: Hoare triple {30#true} assume 0 == ~cond;assume false; {31#false} is VALID [2022-02-20 17:39:43,947 INFO L290 TraceCheckUtils]: 2: Hoare triple {31#false} assume true; {31#false} is VALID [2022-02-20 17:39:43,947 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {31#false} {30#true} #58#return; {31#false} is VALID [2022-02-20 17:39:43,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-20 17:39:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:43,959 INFO L290 TraceCheckUtils]: 0: Hoare triple {30#true} ~cond := #in~cond; {30#true} is VALID [2022-02-20 17:39:43,959 INFO L290 TraceCheckUtils]: 1: Hoare triple {30#true} assume 0 == ~cond;assume false; {31#false} is VALID [2022-02-20 17:39:43,959 INFO L290 TraceCheckUtils]: 2: Hoare triple {31#false} assume true; {31#false} is VALID [2022-02-20 17:39:43,960 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {31#false} {31#false} #60#return; {31#false} is VALID [2022-02-20 17:39:43,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-20 17:39:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:43,966 INFO L290 TraceCheckUtils]: 0: Hoare triple {30#true} ~cond := #in~cond; {30#true} is VALID [2022-02-20 17:39:43,970 INFO L290 TraceCheckUtils]: 1: Hoare triple {30#true} assume 0 == ~cond;assume false; {31#false} is VALID [2022-02-20 17:39:43,970 INFO L290 TraceCheckUtils]: 2: Hoare triple {31#false} assume true; {31#false} is VALID [2022-02-20 17:39:43,970 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {31#false} {31#false} #62#return; {31#false} is VALID [2022-02-20 17:39:43,971 INFO L290 TraceCheckUtils]: 0: Hoare triple {30#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3); {30#true} is VALID [2022-02-20 17:39:43,971 INFO L290 TraceCheckUtils]: 1: Hoare triple {30#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~z~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~z~0#1;assume -2147483648 <= main_#t~nondet4#1 && main_#t~nondet4#1 <= 2147483647;main_~a~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; {30#true} is VALID [2022-02-20 17:39:43,971 INFO L272 TraceCheckUtils]: 2: Hoare triple {30#true} call assume_abort_if_not((if main_~a~0#1 >= 0 && main_~a~0#1 <= 20 then 1 else 0)); {30#true} is VALID [2022-02-20 17:39:43,971 INFO L290 TraceCheckUtils]: 3: Hoare triple {30#true} ~cond := #in~cond; {30#true} is VALID [2022-02-20 17:39:43,972 INFO L290 TraceCheckUtils]: 4: Hoare triple {30#true} assume 0 == ~cond;assume false; {31#false} is VALID [2022-02-20 17:39:43,972 INFO L290 TraceCheckUtils]: 5: Hoare triple {31#false} assume true; {31#false} is VALID [2022-02-20 17:39:43,972 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {31#false} {30#true} #58#return; {31#false} is VALID [2022-02-20 17:39:43,972 INFO L290 TraceCheckUtils]: 7: Hoare triple {31#false} assume -2147483648 <= main_#t~nondet5#1 && main_#t~nondet5#1 <= 2147483647;main_~b~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; {31#false} is VALID [2022-02-20 17:39:43,973 INFO L272 TraceCheckUtils]: 8: Hoare triple {31#false} call assume_abort_if_not((if main_~b~0#1 >= 0 && main_~b~0#1 <= 20 then 1 else 0)); {30#true} is VALID [2022-02-20 17:39:43,973 INFO L290 TraceCheckUtils]: 9: Hoare triple {30#true} ~cond := #in~cond; {30#true} is VALID [2022-02-20 17:39:43,973 INFO L290 TraceCheckUtils]: 10: Hoare triple {30#true} assume 0 == ~cond;assume false; {31#false} is VALID [2022-02-20 17:39:43,974 INFO L290 TraceCheckUtils]: 11: Hoare triple {31#false} assume true; {31#false} is VALID [2022-02-20 17:39:43,974 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {31#false} {31#false} #60#return; {31#false} is VALID [2022-02-20 17:39:43,974 INFO L272 TraceCheckUtils]: 13: Hoare triple {31#false} call assume_abort_if_not((if main_~b~0#1 >= 1 then 1 else 0)); {30#true} is VALID [2022-02-20 17:39:43,974 INFO L290 TraceCheckUtils]: 14: Hoare triple {30#true} ~cond := #in~cond; {30#true} is VALID [2022-02-20 17:39:43,975 INFO L290 TraceCheckUtils]: 15: Hoare triple {30#true} assume 0 == ~cond;assume false; {31#false} is VALID [2022-02-20 17:39:43,975 INFO L290 TraceCheckUtils]: 16: Hoare triple {31#false} assume true; {31#false} is VALID [2022-02-20 17:39:43,976 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {31#false} {31#false} #62#return; {31#false} is VALID [2022-02-20 17:39:43,976 INFO L290 TraceCheckUtils]: 18: Hoare triple {31#false} main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~z~0#1 := 0; {31#false} is VALID [2022-02-20 17:39:43,976 INFO L290 TraceCheckUtils]: 19: Hoare triple {31#false} assume !false; {31#false} is VALID [2022-02-20 17:39:43,976 INFO L272 TraceCheckUtils]: 20: Hoare triple {31#false} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {31#false} is VALID [2022-02-20 17:39:43,977 INFO L290 TraceCheckUtils]: 21: Hoare triple {31#false} ~cond := #in~cond; {31#false} is VALID [2022-02-20 17:39:43,977 INFO L290 TraceCheckUtils]: 22: Hoare triple {31#false} assume 0 == ~cond; {31#false} is VALID [2022-02-20 17:39:43,977 INFO L290 TraceCheckUtils]: 23: Hoare triple {31#false} assume !false; {31#false} is VALID [2022-02-20 17:39:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-20 17:39:43,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 17:39:43,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424838902] [2022-02-20 17:39:43,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424838902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 17:39:43,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 17:39:43,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-20 17:39:43,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470288446] [2022-02-20 17:39:43,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 17:39:43,984 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-02-20 17:39:43,985 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 17:39:43,987 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-20 17:39:44,004 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:39:44,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-20 17:39:44,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 17:39:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-20 17:39:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 17:39:44,020 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-20 17:39:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:44,080 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-02-20 17:39:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 17:39:44,081 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-02-20 17:39:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 17:39:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-20 17:39:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2022-02-20 17:39:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-20 17:39:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2022-02-20 17:39:44,091 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 71 transitions. [2022-02-20 17:39:44,163 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 71 edges. 71 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:39:44,186 INFO L225 Difference]: With dead ends: 51 [2022-02-20 17:39:44,186 INFO L226 Difference]: Without dead ends: 23 [2022-02-20 17:39:44,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 17:39:44,191 INFO L933 BasicCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 17:39:44,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 17:39:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-20 17:39:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-20 17:39:44,212 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 17:39:44,213 INFO L82 GeneralOperation]: Start isEquivalent. First operand 23 states. Second operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-20 17:39:44,214 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-20 17:39:44,214 INFO L87 Difference]: Start difference. First operand 23 states. Second operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-20 17:39:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:44,218 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-02-20 17:39:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-02-20 17:39:44,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:39:44,220 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:39:44,220 INFO L74 IsIncluded]: Start isIncluded. First operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 23 states. [2022-02-20 17:39:44,220 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 23 states. [2022-02-20 17:39:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:44,224 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-02-20 17:39:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-02-20 17:39:44,224 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:39:44,225 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:39:44,225 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 17:39:44,226 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 17:39:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-20 17:39:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-02-20 17:39:44,229 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2022-02-20 17:39:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 17:39:44,229 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-02-20 17:39:44,230 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-20 17:39:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-02-20 17:39:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-20 17:39:44,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:39:44,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:39:44,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-20 17:39:44,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:39:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:39:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2022-02-20 17:39:44,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 17:39:44,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545862780] [2022-02-20 17:39:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:39:44,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 17:39:44,249 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 17:39:44,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251258878] [2022-02-20 17:39:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:39:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 17:39:44,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:39:44,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-20 17:39:44,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-20 17:39:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-20 17:39:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:44,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 17:39:44,465 INFO L290 TraceCheckUtils]: 0: Hoare triple {191#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3); {191#true} is VALID [2022-02-20 17:39:44,466 INFO L290 TraceCheckUtils]: 1: Hoare triple {191#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~z~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~z~0#1;assume -2147483648 <= main_#t~nondet4#1 && main_#t~nondet4#1 <= 2147483647;main_~a~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; {191#true} is VALID [2022-02-20 17:39:44,466 INFO L272 TraceCheckUtils]: 2: Hoare triple {191#true} call assume_abort_if_not((if main_~a~0#1 >= 0 && main_~a~0#1 <= 20 then 1 else 0)); {191#true} is VALID [2022-02-20 17:39:44,466 INFO L290 TraceCheckUtils]: 3: Hoare triple {191#true} ~cond := #in~cond; {191#true} is VALID [2022-02-20 17:39:44,466 INFO L290 TraceCheckUtils]: 4: Hoare triple {191#true} assume !(0 == ~cond); {191#true} is VALID [2022-02-20 17:39:44,466 INFO L290 TraceCheckUtils]: 5: Hoare triple {191#true} assume true; {191#true} is VALID [2022-02-20 17:39:44,466 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {191#true} {191#true} #58#return; {191#true} is VALID [2022-02-20 17:39:44,467 INFO L290 TraceCheckUtils]: 7: Hoare triple {191#true} assume -2147483648 <= main_#t~nondet5#1 && main_#t~nondet5#1 <= 2147483647;main_~b~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; {191#true} is VALID [2022-02-20 17:39:44,467 INFO L272 TraceCheckUtils]: 8: Hoare triple {191#true} call assume_abort_if_not((if main_~b~0#1 >= 0 && main_~b~0#1 <= 20 then 1 else 0)); {191#true} is VALID [2022-02-20 17:39:44,467 INFO L290 TraceCheckUtils]: 9: Hoare triple {191#true} ~cond := #in~cond; {191#true} is VALID [2022-02-20 17:39:44,467 INFO L290 TraceCheckUtils]: 10: Hoare triple {191#true} assume !(0 == ~cond); {191#true} is VALID [2022-02-20 17:39:44,467 INFO L290 TraceCheckUtils]: 11: Hoare triple {191#true} assume true; {191#true} is VALID [2022-02-20 17:39:44,468 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {191#true} {191#true} #60#return; {191#true} is VALID [2022-02-20 17:39:44,468 INFO L272 TraceCheckUtils]: 13: Hoare triple {191#true} call assume_abort_if_not((if main_~b~0#1 >= 1 then 1 else 0)); {191#true} is VALID [2022-02-20 17:39:44,468 INFO L290 TraceCheckUtils]: 14: Hoare triple {191#true} ~cond := #in~cond; {191#true} is VALID [2022-02-20 17:39:44,468 INFO L290 TraceCheckUtils]: 15: Hoare triple {191#true} assume !(0 == ~cond); {191#true} is VALID [2022-02-20 17:39:44,468 INFO L290 TraceCheckUtils]: 16: Hoare triple {191#true} assume true; {191#true} is VALID [2022-02-20 17:39:44,469 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {191#true} {191#true} #62#return; {191#true} is VALID [2022-02-20 17:39:44,469 INFO L290 TraceCheckUtils]: 18: Hoare triple {191#true} main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~z~0#1 := 0; {250#(and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:39:44,470 INFO L290 TraceCheckUtils]: 19: Hoare triple {250#(and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} assume !false; {250#(and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:39:44,470 INFO L272 TraceCheckUtils]: 20: Hoare triple {250#(and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {257#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-02-20 17:39:44,471 INFO L290 TraceCheckUtils]: 21: Hoare triple {257#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {261#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-02-20 17:39:44,471 INFO L290 TraceCheckUtils]: 22: Hoare triple {261#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {192#false} is VALID [2022-02-20 17:39:44,472 INFO L290 TraceCheckUtils]: 23: Hoare triple {192#false} assume !false; {192#false} is VALID [2022-02-20 17:39:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-20 17:39:44,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 17:39:44,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 17:39:44,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545862780] [2022-02-20 17:39:44,473 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 17:39:44,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251258878] [2022-02-20 17:39:44,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251258878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 17:39:44,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 17:39:44,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-20 17:39:44,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129925415] [2022-02-20 17:39:44,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 17:39:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-20 17:39:44,475 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 17:39:44,475 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-20 17:39:44,488 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:39:44,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-20 17:39:44,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 17:39:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-20 17:39:44,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-20 17:39:44,490 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-20 17:39:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:44,596 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-02-20 17:39:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-20 17:39:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-20 17:39:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 17:39:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-20 17:39:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-02-20 17:39:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-20 17:39:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-02-20 17:39:44,600 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 41 transitions. [2022-02-20 17:39:44,628 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:39:44,629 INFO L225 Difference]: With dead ends: 35 [2022-02-20 17:39:44,629 INFO L226 Difference]: Without dead ends: 33 [2022-02-20 17:39:44,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-20 17:39:44,630 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 17:39:44,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 17:39:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-20 17:39:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-02-20 17:39:44,635 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 17:39:44,635 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:44,635 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:44,636 INFO L87 Difference]: Start difference. First operand 33 states. Second operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:44,637 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-02-20 17:39:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-02-20 17:39:44,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:39:44,638 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:39:44,638 INFO L74 IsIncluded]: Start isIncluded. First operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 33 states. [2022-02-20 17:39:44,639 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 33 states. [2022-02-20 17:39:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:44,640 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-02-20 17:39:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-02-20 17:39:44,641 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:39:44,641 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:39:44,641 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 17:39:44,641 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 17:39:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-02-20 17:39:44,643 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2022-02-20 17:39:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 17:39:44,643 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-02-20 17:39:44,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-20 17:39:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-02-20 17:39:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-20 17:39:44,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:39:44,645 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:39:44,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-20 17:39:44,877 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 [2022-02-20 17:39:44,878 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:39:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:39:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2022-02-20 17:39:44,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 17:39:44,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100536232] [2022-02-20 17:39:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:39:44,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 17:39:44,892 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 17:39:44,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338856369] [2022-02-20 17:39:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:39:44,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 17:39:44,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:39:44,908 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-20 17:39:44,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-20 17:39:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-20 17:39:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 17:39:45,037 INFO L290 TraceCheckUtils]: 0: Hoare triple {422#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3); {422#true} is VALID [2022-02-20 17:39:45,038 INFO L290 TraceCheckUtils]: 1: Hoare triple {422#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~z~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~z~0#1;assume -2147483648 <= main_#t~nondet4#1 && main_#t~nondet4#1 <= 2147483647;main_~a~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; {422#true} is VALID [2022-02-20 17:39:45,038 INFO L272 TraceCheckUtils]: 2: Hoare triple {422#true} call assume_abort_if_not((if main_~a~0#1 >= 0 && main_~a~0#1 <= 20 then 1 else 0)); {422#true} is VALID [2022-02-20 17:39:45,038 INFO L290 TraceCheckUtils]: 3: Hoare triple {422#true} ~cond := #in~cond; {422#true} is VALID [2022-02-20 17:39:45,038 INFO L290 TraceCheckUtils]: 4: Hoare triple {422#true} assume !(0 == ~cond); {422#true} is VALID [2022-02-20 17:39:45,039 INFO L290 TraceCheckUtils]: 5: Hoare triple {422#true} assume true; {422#true} is VALID [2022-02-20 17:39:45,039 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {422#true} {422#true} #58#return; {422#true} is VALID [2022-02-20 17:39:45,039 INFO L290 TraceCheckUtils]: 7: Hoare triple {422#true} assume -2147483648 <= main_#t~nondet5#1 && main_#t~nondet5#1 <= 2147483647;main_~b~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; {422#true} is VALID [2022-02-20 17:39:45,039 INFO L272 TraceCheckUtils]: 8: Hoare triple {422#true} call assume_abort_if_not((if main_~b~0#1 >= 0 && main_~b~0#1 <= 20 then 1 else 0)); {422#true} is VALID [2022-02-20 17:39:45,039 INFO L290 TraceCheckUtils]: 9: Hoare triple {422#true} ~cond := #in~cond; {422#true} is VALID [2022-02-20 17:39:45,039 INFO L290 TraceCheckUtils]: 10: Hoare triple {422#true} assume !(0 == ~cond); {422#true} is VALID [2022-02-20 17:39:45,040 INFO L290 TraceCheckUtils]: 11: Hoare triple {422#true} assume true; {422#true} is VALID [2022-02-20 17:39:45,040 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {422#true} {422#true} #60#return; {422#true} is VALID [2022-02-20 17:39:45,040 INFO L272 TraceCheckUtils]: 13: Hoare triple {422#true} call assume_abort_if_not((if main_~b~0#1 >= 1 then 1 else 0)); {422#true} is VALID [2022-02-20 17:39:45,040 INFO L290 TraceCheckUtils]: 14: Hoare triple {422#true} ~cond := #in~cond; {469#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-02-20 17:39:45,041 INFO L290 TraceCheckUtils]: 15: Hoare triple {469#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {473#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-02-20 17:39:45,041 INFO L290 TraceCheckUtils]: 16: Hoare triple {473#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {473#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-02-20 17:39:45,046 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {473#(not (= |assume_abort_if_not_#in~cond| 0))} {422#true} #62#return; {480#(<= 1 |ULTIMATE.start_main_~b~0#1|)} is VALID [2022-02-20 17:39:45,046 INFO L290 TraceCheckUtils]: 18: Hoare triple {480#(<= 1 |ULTIMATE.start_main_~b~0#1|)} main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~z~0#1 := 0; {484#(<= 1 |ULTIMATE.start_main_~y~0#1|)} is VALID [2022-02-20 17:39:45,047 INFO L290 TraceCheckUtils]: 19: Hoare triple {484#(<= 1 |ULTIMATE.start_main_~y~0#1|)} assume !false; {484#(<= 1 |ULTIMATE.start_main_~y~0#1|)} is VALID [2022-02-20 17:39:45,047 INFO L272 TraceCheckUtils]: 20: Hoare triple {484#(<= 1 |ULTIMATE.start_main_~y~0#1|)} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {422#true} is VALID [2022-02-20 17:39:45,047 INFO L290 TraceCheckUtils]: 21: Hoare triple {422#true} ~cond := #in~cond; {422#true} is VALID [2022-02-20 17:39:45,047 INFO L290 TraceCheckUtils]: 22: Hoare triple {422#true} assume !(0 == ~cond); {422#true} is VALID [2022-02-20 17:39:45,047 INFO L290 TraceCheckUtils]: 23: Hoare triple {422#true} assume true; {422#true} is VALID [2022-02-20 17:39:45,048 INFO L284 TraceCheckUtils]: 24: Hoare quadruple {422#true} {484#(<= 1 |ULTIMATE.start_main_~y~0#1|)} #64#return; {484#(<= 1 |ULTIMATE.start_main_~y~0#1|)} is VALID [2022-02-20 17:39:45,049 INFO L290 TraceCheckUtils]: 25: Hoare triple {484#(<= 1 |ULTIMATE.start_main_~y~0#1|)} assume !(0 != main_~y~0#1); {423#false} is VALID [2022-02-20 17:39:45,049 INFO L272 TraceCheckUtils]: 26: Hoare triple {423#false} call __VERIFIER_assert((if main_~z~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {423#false} is VALID [2022-02-20 17:39:45,049 INFO L290 TraceCheckUtils]: 27: Hoare triple {423#false} ~cond := #in~cond; {423#false} is VALID [2022-02-20 17:39:45,049 INFO L290 TraceCheckUtils]: 28: Hoare triple {423#false} assume 0 == ~cond; {423#false} is VALID [2022-02-20 17:39:45,049 INFO L290 TraceCheckUtils]: 29: Hoare triple {423#false} assume !false; {423#false} is VALID [2022-02-20 17:39:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-20 17:39:45,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 17:39:45,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 17:39:45,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100536232] [2022-02-20 17:39:45,050 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 17:39:45,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338856369] [2022-02-20 17:39:45,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338856369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 17:39:45,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 17:39:45,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-20 17:39:45,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818500830] [2022-02-20 17:39:45,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 17:39:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-20 17:39:45,052 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 17:39:45,052 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:39:45,070 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:39:45,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-20 17:39:45,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 17:39:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-20 17:39:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-20 17:39:45,071 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:39:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:45,187 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-02-20 17:39:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-20 17:39:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-20 17:39:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 17:39:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:39:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 41 transitions. [2022-02-20 17:39:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:39:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 41 transitions. [2022-02-20 17:39:45,190 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 41 transitions. [2022-02-20 17:39:45,216 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:39:45,217 INFO L225 Difference]: With dead ends: 39 [2022-02-20 17:39:45,217 INFO L226 Difference]: Without dead ends: 32 [2022-02-20 17:39:45,217 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 [2022-02-20 17:39:45,218 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 17:39:45,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 17:39:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-20 17:39:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-02-20 17:39:45,225 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 17:39:45,225 INFO L82 GeneralOperation]: Start isEquivalent. First operand 32 states. Second operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:45,225 INFO L74 IsIncluded]: Start isIncluded. First operand 32 states. Second operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:45,225 INFO L87 Difference]: Start difference. First operand 32 states. Second operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:45,227 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-02-20 17:39:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-02-20 17:39:45,228 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:39:45,228 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:39:45,228 INFO L74 IsIncluded]: Start isIncluded. First operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 32 states. [2022-02-20 17:39:45,228 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 32 states. [2022-02-20 17:39:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:39:45,230 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-02-20 17:39:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-02-20 17:39:45,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:39:45,230 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:39:45,230 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 17:39:45,230 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 17:39:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-20 17:39:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-20 17:39:45,232 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2022-02-20 17:39:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 17:39:45,232 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-20 17:39:45,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-20 17:39:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-20 17:39:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-20 17:39:45,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:39:45,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:39:45,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-20 17:39:45,449 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 [2022-02-20 17:39:45,452 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:39:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:39:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2022-02-20 17:39:45,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 17:39:45,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859191770] [2022-02-20 17:39:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:39:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 17:39:45,470 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 17:39:45,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863499471] [2022-02-20 17:39:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:39:45,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 17:39:45,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:39:45,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-20 17:39:45,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-20 17:39:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:45,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-20 17:39:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:39:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 17:39:46,932 INFO L290 TraceCheckUtils]: 0: Hoare triple {678#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3); {678#true} is VALID [2022-02-20 17:39:46,932 INFO L290 TraceCheckUtils]: 1: Hoare triple {678#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~z~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~z~0#1;assume -2147483648 <= main_#t~nondet4#1 && main_#t~nondet4#1 <= 2147483647;main_~a~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; {678#true} is VALID [2022-02-20 17:39:46,933 INFO L272 TraceCheckUtils]: 2: Hoare triple {678#true} call assume_abort_if_not((if main_~a~0#1 >= 0 && main_~a~0#1 <= 20 then 1 else 0)); {678#true} is VALID [2022-02-20 17:39:46,933 INFO L290 TraceCheckUtils]: 3: Hoare triple {678#true} ~cond := #in~cond; {692#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-02-20 17:39:46,933 INFO L290 TraceCheckUtils]: 4: Hoare triple {692#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {696#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-02-20 17:39:46,934 INFO L290 TraceCheckUtils]: 5: Hoare triple {696#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {696#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-02-20 17:39:46,934 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {696#(not (= |assume_abort_if_not_#in~cond| 0))} {678#true} #58#return; {703#(and (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} is VALID [2022-02-20 17:39:46,935 INFO L290 TraceCheckUtils]: 7: Hoare triple {703#(and (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} assume -2147483648 <= main_#t~nondet5#1 && main_#t~nondet5#1 <= 2147483647;main_~b~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; {703#(and (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} is VALID [2022-02-20 17:39:46,935 INFO L272 TraceCheckUtils]: 8: Hoare triple {703#(and (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} call assume_abort_if_not((if main_~b~0#1 >= 0 && main_~b~0#1 <= 20 then 1 else 0)); {678#true} is VALID [2022-02-20 17:39:46,935 INFO L290 TraceCheckUtils]: 9: Hoare triple {678#true} ~cond := #in~cond; {692#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-02-20 17:39:46,936 INFO L290 TraceCheckUtils]: 10: Hoare triple {692#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {696#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-02-20 17:39:46,936 INFO L290 TraceCheckUtils]: 11: Hoare triple {696#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {696#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-02-20 17:39:46,940 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {696#(not (= |assume_abort_if_not_#in~cond| 0))} {703#(and (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} #60#return; {722#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} is VALID [2022-02-20 17:39:46,940 INFO L272 TraceCheckUtils]: 13: Hoare triple {722#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} call assume_abort_if_not((if main_~b~0#1 >= 1 then 1 else 0)); {678#true} is VALID [2022-02-20 17:39:46,940 INFO L290 TraceCheckUtils]: 14: Hoare triple {678#true} ~cond := #in~cond; {678#true} is VALID [2022-02-20 17:39:46,940 INFO L290 TraceCheckUtils]: 15: Hoare triple {678#true} assume !(0 == ~cond); {678#true} is VALID [2022-02-20 17:39:46,940 INFO L290 TraceCheckUtils]: 16: Hoare triple {678#true} assume true; {678#true} is VALID [2022-02-20 17:39:46,941 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {678#true} {722#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} #62#return; {722#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} is VALID [2022-02-20 17:39:46,941 INFO L290 TraceCheckUtils]: 18: Hoare triple {722#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~z~0#1 := 0; {741#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:39:46,942 INFO L290 TraceCheckUtils]: 19: Hoare triple {741#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} assume !false; {741#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:39:46,942 INFO L272 TraceCheckUtils]: 20: Hoare triple {741#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {678#true} is VALID [2022-02-20 17:39:46,942 INFO L290 TraceCheckUtils]: 21: Hoare triple {678#true} ~cond := #in~cond; {751#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-02-20 17:39:46,943 INFO L290 TraceCheckUtils]: 22: Hoare triple {751#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {755#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-02-20 17:39:46,943 INFO L290 TraceCheckUtils]: 23: Hoare triple {755#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {755#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-02-20 17:39:46,944 INFO L284 TraceCheckUtils]: 24: Hoare quadruple {755#(not (= |__VERIFIER_assert_#in~cond| 0))} {741#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} #64#return; {741#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:39:46,945 INFO L290 TraceCheckUtils]: 25: Hoare triple {741#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} assume !!(0 != main_~y~0#1); {765#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (not (= |ULTIMATE.start_main_~y~0#1| 0)) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:39:46,946 INFO L290 TraceCheckUtils]: 26: Hoare triple {765#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (not (= |ULTIMATE.start_main_~y~0#1| 0)) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} assume 1 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2);main_~z~0#1 := main_~z~0#1 + main_~x~0#1;main_~y~0#1 := main_~y~0#1 - 1; {769#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= 1 (mod |ULTIMATE.start_main_~b~0#1| 2)) (<= |ULTIMATE.start_main_~b~0#1| 20) (= (+ |ULTIMATE.start_main_~y~0#1| 1) |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:39:46,952 INFO L290 TraceCheckUtils]: 27: Hoare triple {769#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= 1 (mod |ULTIMATE.start_main_~b~0#1| 2)) (<= |ULTIMATE.start_main_~b~0#1| 20) (= (+ |ULTIMATE.start_main_~y~0#1| 1) |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} main_~x~0#1 := 2 * main_~x~0#1;main_~y~0#1 := (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then 1 + main_~y~0#1 / 2 else main_~y~0#1 / 2); {773#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= 1 (mod |ULTIMATE.start_main_~b~0#1| 2)) (<= |ULTIMATE.start_main_~b~0#1| 20) (= (div (+ (- 1) |ULTIMATE.start_main_~b~0#1|) 2) |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~z~0#1|)) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} is VALID [2022-02-20 17:39:46,952 INFO L290 TraceCheckUtils]: 28: Hoare triple {773#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= 1 (mod |ULTIMATE.start_main_~b~0#1| 2)) (<= |ULTIMATE.start_main_~b~0#1| 20) (= (div (+ (- 1) |ULTIMATE.start_main_~b~0#1|) 2) |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~z~0#1|)) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} assume !false; {773#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= 1 (mod |ULTIMATE.start_main_~b~0#1| 2)) (<= |ULTIMATE.start_main_~b~0#1| 20) (= (div (+ (- 1) |ULTIMATE.start_main_~b~0#1|) 2) |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~z~0#1|)) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} is VALID [2022-02-20 17:39:46,961 INFO L272 TraceCheckUtils]: 29: Hoare triple {773#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= 1 (mod |ULTIMATE.start_main_~b~0#1| 2)) (<= |ULTIMATE.start_main_~b~0#1| 20) (= (div (+ (- 1) |ULTIMATE.start_main_~b~0#1|) 2) |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~z~0#1|)) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|))} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {780#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-02-20 17:39:46,962 INFO L290 TraceCheckUtils]: 30: Hoare triple {780#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {784#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-02-20 17:39:46,962 INFO L290 TraceCheckUtils]: 31: Hoare triple {784#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {679#false} is VALID [2022-02-20 17:39:46,962 INFO L290 TraceCheckUtils]: 32: Hoare triple {679#false} assume !false; {679#false} is VALID [2022-02-20 17:39:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-20 17:39:46,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-20 17:40:49,812 INFO L290 TraceCheckUtils]: 32: Hoare triple {679#false} assume !false; {679#false} is VALID [2022-02-20 17:40:49,813 INFO L290 TraceCheckUtils]: 31: Hoare triple {784#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {679#false} is VALID [2022-02-20 17:40:49,813 INFO L290 TraceCheckUtils]: 30: Hoare triple {780#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {784#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-02-20 17:40:49,814 INFO L272 TraceCheckUtils]: 29: Hoare triple {800#(= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {780#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-02-20 17:40:49,814 INFO L290 TraceCheckUtils]: 28: Hoare triple {800#(= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))} assume !false; {800#(= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))} is VALID [2022-02-20 17:40:49,832 INFO L290 TraceCheckUtils]: 27: Hoare triple {807#(and (or (= (+ (* (* 2 |ULTIMATE.start_main_~x~0#1|) (div |ULTIMATE.start_main_~y~0#1| 2)) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (and (< |ULTIMATE.start_main_~y~0#1| 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 2) 0)))) (or (= (+ |ULTIMATE.start_main_~z~0#1| (* (* 2 |ULTIMATE.start_main_~x~0#1|) (+ 1 (div |ULTIMATE.start_main_~y~0#1| 2)))) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (= (mod |ULTIMATE.start_main_~y~0#1| 2) 0) (not (< |ULTIMATE.start_main_~y~0#1| 0))))} main_~x~0#1 := 2 * main_~x~0#1;main_~y~0#1 := (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then 1 + main_~y~0#1 / 2 else main_~y~0#1 / 2); {800#(= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))} is VALID [2022-02-20 17:40:49,835 INFO L290 TraceCheckUtils]: 26: Hoare triple {811#(or (not (<= 1 (mod |ULTIMATE.start_main_~y~0#1| 2))) (< |ULTIMATE.start_main_~y~0#1| 0) (= (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1| (* (* 2 |ULTIMATE.start_main_~x~0#1|) (div (+ (- 1) |ULTIMATE.start_main_~y~0#1|) 2))) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)))} assume 1 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2);main_~z~0#1 := main_~z~0#1 + main_~x~0#1;main_~y~0#1 := main_~y~0#1 - 1; {807#(and (or (= (+ (* (* 2 |ULTIMATE.start_main_~x~0#1|) (div |ULTIMATE.start_main_~y~0#1| 2)) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (and (< |ULTIMATE.start_main_~y~0#1| 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 2) 0)))) (or (= (+ |ULTIMATE.start_main_~z~0#1| (* (* 2 |ULTIMATE.start_main_~x~0#1|) (+ 1 (div |ULTIMATE.start_main_~y~0#1| 2)))) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (= (mod |ULTIMATE.start_main_~y~0#1| 2) 0) (not (< |ULTIMATE.start_main_~y~0#1| 0))))} is VALID [2022-02-20 17:40:49,835 INFO L290 TraceCheckUtils]: 25: Hoare triple {811#(or (not (<= 1 (mod |ULTIMATE.start_main_~y~0#1| 2))) (< |ULTIMATE.start_main_~y~0#1| 0) (= (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1| (* (* 2 |ULTIMATE.start_main_~x~0#1|) (div (+ (- 1) |ULTIMATE.start_main_~y~0#1|) 2))) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)))} assume !!(0 != main_~y~0#1); {811#(or (not (<= 1 (mod |ULTIMATE.start_main_~y~0#1| 2))) (< |ULTIMATE.start_main_~y~0#1| 0) (= (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1| (* (* 2 |ULTIMATE.start_main_~x~0#1|) (div (+ (- 1) |ULTIMATE.start_main_~y~0#1|) 2))) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)))} is VALID [2022-02-20 17:40:51,015 INFO L284 TraceCheckUtils]: 24: Hoare quadruple {755#(not (= |__VERIFIER_assert_#in~cond| 0))} {678#true} #64#return; {811#(or (not (<= 1 (mod |ULTIMATE.start_main_~y~0#1| 2))) (< |ULTIMATE.start_main_~y~0#1| 0) (= (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1| (* (* 2 |ULTIMATE.start_main_~x~0#1|) (div (+ (- 1) |ULTIMATE.start_main_~y~0#1|) 2))) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)))} is VALID [2022-02-20 17:40:51,016 INFO L290 TraceCheckUtils]: 23: Hoare triple {755#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {755#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-02-20 17:40:51,016 INFO L290 TraceCheckUtils]: 22: Hoare triple {827#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {755#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-02-20 17:40:51,017 INFO L290 TraceCheckUtils]: 21: Hoare triple {678#true} ~cond := #in~cond; {827#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-02-20 17:40:51,017 INFO L272 TraceCheckUtils]: 20: Hoare triple {678#true} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {678#true} is VALID [2022-02-20 17:40:51,017 INFO L290 TraceCheckUtils]: 19: Hoare triple {678#true} assume !false; {678#true} is VALID [2022-02-20 17:40:51,017 INFO L290 TraceCheckUtils]: 18: Hoare triple {678#true} main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~z~0#1 := 0; {678#true} is VALID [2022-02-20 17:40:51,017 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {678#true} {678#true} #62#return; {678#true} is VALID [2022-02-20 17:40:51,017 INFO L290 TraceCheckUtils]: 16: Hoare triple {678#true} assume true; {678#true} is VALID [2022-02-20 17:40:51,018 INFO L290 TraceCheckUtils]: 15: Hoare triple {678#true} assume !(0 == ~cond); {678#true} is VALID [2022-02-20 17:40:51,018 INFO L290 TraceCheckUtils]: 14: Hoare triple {678#true} ~cond := #in~cond; {678#true} is VALID [2022-02-20 17:40:51,018 INFO L272 TraceCheckUtils]: 13: Hoare triple {678#true} call assume_abort_if_not((if main_~b~0#1 >= 1 then 1 else 0)); {678#true} is VALID [2022-02-20 17:40:51,018 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {678#true} {678#true} #60#return; {678#true} is VALID [2022-02-20 17:40:51,018 INFO L290 TraceCheckUtils]: 11: Hoare triple {678#true} assume true; {678#true} is VALID [2022-02-20 17:40:51,018 INFO L290 TraceCheckUtils]: 10: Hoare triple {678#true} assume !(0 == ~cond); {678#true} is VALID [2022-02-20 17:40:51,018 INFO L290 TraceCheckUtils]: 9: Hoare triple {678#true} ~cond := #in~cond; {678#true} is VALID [2022-02-20 17:40:51,018 INFO L272 TraceCheckUtils]: 8: Hoare triple {678#true} call assume_abort_if_not((if main_~b~0#1 >= 0 && main_~b~0#1 <= 20 then 1 else 0)); {678#true} is VALID [2022-02-20 17:40:51,018 INFO L290 TraceCheckUtils]: 7: Hoare triple {678#true} assume -2147483648 <= main_#t~nondet5#1 && main_#t~nondet5#1 <= 2147483647;main_~b~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; {678#true} is VALID [2022-02-20 17:40:51,019 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {678#true} {678#true} #58#return; {678#true} is VALID [2022-02-20 17:40:51,019 INFO L290 TraceCheckUtils]: 5: Hoare triple {678#true} assume true; {678#true} is VALID [2022-02-20 17:40:51,019 INFO L290 TraceCheckUtils]: 4: Hoare triple {678#true} assume !(0 == ~cond); {678#true} is VALID [2022-02-20 17:40:51,019 INFO L290 TraceCheckUtils]: 3: Hoare triple {678#true} ~cond := #in~cond; {678#true} is VALID [2022-02-20 17:40:51,019 INFO L272 TraceCheckUtils]: 2: Hoare triple {678#true} call assume_abort_if_not((if main_~a~0#1 >= 0 && main_~a~0#1 <= 20 then 1 else 0)); {678#true} is VALID [2022-02-20 17:40:51,019 INFO L290 TraceCheckUtils]: 1: Hoare triple {678#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~z~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~z~0#1;assume -2147483648 <= main_#t~nondet4#1 && main_#t~nondet4#1 <= 2147483647;main_~a~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; {678#true} is VALID [2022-02-20 17:40:51,019 INFO L290 TraceCheckUtils]: 0: Hoare triple {678#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3); {678#true} is VALID [2022-02-20 17:40:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-20 17:40:51,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 17:40:51,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859191770] [2022-02-20 17:40:51,020 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 17:40:51,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863499471] [2022-02-20 17:40:51,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863499471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-20 17:40:51,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-20 17:40:51,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-02-20 17:40:51,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410659024] [2022-02-20 17:40:51,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-20 17:40:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 33 [2022-02-20 17:40:51,022 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 17:40:51,022 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-20 17:40:51,460 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 47 edges. 47 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:40:51,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-20 17:40:51,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 17:40:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-20 17:40:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-20 17:40:51,461 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-20 17:40:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:40:54,095 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-02-20 17:40:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-20 17:40:54,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 33 [2022-02-20 17:40:54,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 17:40:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-20 17:40:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 53 transitions. [2022-02-20 17:40:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-20 17:40:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 53 transitions. [2022-02-20 17:40:54,106 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 18 states and 53 transitions. [2022-02-20 17:40:56,189 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 53 edges. 52 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-02-20 17:40:56,190 INFO L225 Difference]: With dead ends: 48 [2022-02-20 17:40:56,190 INFO L226 Difference]: Without dead ends: 46 [2022-02-20 17:40:56,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-02-20 17:40:56,191 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-20 17:40:56,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 145 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-20 17:40:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-20 17:40:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-02-20 17:40:56,225 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 17:40:56,225 INFO L82 GeneralOperation]: Start isEquivalent. First operand 46 states. Second operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 17:40:56,226 INFO L74 IsIncluded]: Start isIncluded. First operand 46 states. Second operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 17:40:56,226 INFO L87 Difference]: Start difference. First operand 46 states. Second operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 17:40:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:40:56,232 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-02-20 17:40:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-02-20 17:40:56,234 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:40:56,234 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:40:56,235 INFO L74 IsIncluded]: Start isIncluded. First operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand 46 states. [2022-02-20 17:40:56,235 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand 46 states. [2022-02-20 17:40:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:40:56,241 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-02-20 17:40:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-02-20 17:40:56,247 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:40:56,250 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:40:56,250 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 17:40:56,250 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 17:40:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 17:40:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-02-20 17:40:56,252 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 33 [2022-02-20 17:40:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 17:40:56,253 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-02-20 17:40:56,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-20 17:40:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-02-20 17:40:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-20 17:40:56,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:40:56,255 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-20 17:40:56,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-20 17:40:56,468 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 [2022-02-20 17:40:56,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:40:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:40:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2022-02-20 17:40:56,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 17:40:56,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681081432] [2022-02-20 17:40:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:40:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 17:40:56,489 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 17:40:56,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766018138] [2022-02-20 17:40:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:40:56,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 17:40:56,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:40:56,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-20 17:40:56,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-20 17:40:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:40:56,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-20 17:40:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:40:56,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 17:41:04,814 INFO L290 TraceCheckUtils]: 0: Hoare triple {1121#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3); {1121#true} is VALID [2022-02-20 17:41:04,814 INFO L290 TraceCheckUtils]: 1: Hoare triple {1121#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~z~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~z~0#1;assume -2147483648 <= main_#t~nondet4#1 && main_#t~nondet4#1 <= 2147483647;main_~a~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L272 TraceCheckUtils]: 2: Hoare triple {1121#true} call assume_abort_if_not((if main_~a~0#1 >= 0 && main_~a~0#1 <= 20 then 1 else 0)); {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L290 TraceCheckUtils]: 3: Hoare triple {1121#true} ~cond := #in~cond; {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L290 TraceCheckUtils]: 4: Hoare triple {1121#true} assume !(0 == ~cond); {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L290 TraceCheckUtils]: 5: Hoare triple {1121#true} assume true; {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {1121#true} {1121#true} #58#return; {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L290 TraceCheckUtils]: 7: Hoare triple {1121#true} assume -2147483648 <= main_#t~nondet5#1 && main_#t~nondet5#1 <= 2147483647;main_~b~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L272 TraceCheckUtils]: 8: Hoare triple {1121#true} call assume_abort_if_not((if main_~b~0#1 >= 0 && main_~b~0#1 <= 20 then 1 else 0)); {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L290 TraceCheckUtils]: 9: Hoare triple {1121#true} ~cond := #in~cond; {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L290 TraceCheckUtils]: 10: Hoare triple {1121#true} assume !(0 == ~cond); {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L290 TraceCheckUtils]: 11: Hoare triple {1121#true} assume true; {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1121#true} {1121#true} #60#return; {1121#true} is VALID [2022-02-20 17:41:04,815 INFO L272 TraceCheckUtils]: 13: Hoare triple {1121#true} call assume_abort_if_not((if main_~b~0#1 >= 1 then 1 else 0)); {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 14: Hoare triple {1121#true} ~cond := #in~cond; {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 15: Hoare triple {1121#true} assume !(0 == ~cond); {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 16: Hoare triple {1121#true} assume true; {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {1121#true} {1121#true} #62#return; {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 18: Hoare triple {1121#true} main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~z~0#1 := 0; {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 19: Hoare triple {1121#true} assume !false; {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L272 TraceCheckUtils]: 20: Hoare triple {1121#true} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 21: Hoare triple {1121#true} ~cond := #in~cond; {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 22: Hoare triple {1121#true} assume !(0 == ~cond); {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 23: Hoare triple {1121#true} assume true; {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L284 TraceCheckUtils]: 24: Hoare quadruple {1121#true} {1121#true} #64#return; {1121#true} is VALID [2022-02-20 17:41:04,816 INFO L290 TraceCheckUtils]: 25: Hoare triple {1121#true} assume !!(0 != main_~y~0#1); {1121#true} is VALID [2022-02-20 17:41:04,817 INFO L290 TraceCheckUtils]: 26: Hoare triple {1121#true} assume 1 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2);main_~z~0#1 := main_~z~0#1 + main_~x~0#1;main_~y~0#1 := main_~y~0#1 - 1; {1121#true} is VALID [2022-02-20 17:41:04,817 INFO L290 TraceCheckUtils]: 27: Hoare triple {1121#true} main_~x~0#1 := 2 * main_~x~0#1;main_~y~0#1 := (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then 1 + main_~y~0#1 / 2 else main_~y~0#1 / 2); {1121#true} is VALID [2022-02-20 17:41:04,817 INFO L290 TraceCheckUtils]: 28: Hoare triple {1121#true} assume !false; {1121#true} is VALID [2022-02-20 17:41:04,817 INFO L272 TraceCheckUtils]: 29: Hoare triple {1121#true} call __VERIFIER_assert((if main_~z~0#1 + main_~x~0#1 * main_~y~0#1 == main_~a~0#1 * main_~b~0#1 then 1 else 0)); {1121#true} is VALID [2022-02-20 17:41:04,819 INFO L290 TraceCheckUtils]: 30: Hoare triple {1121#true} ~cond := #in~cond; {1216#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-02-20 17:41:04,819 INFO L290 TraceCheckUtils]: 31: Hoare triple {1216#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1220#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-02-20 17:41:04,819 INFO L290 TraceCheckUtils]: 32: Hoare triple {1220#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1220#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID