./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound50.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 a8205221af56d42ab3d3bf56969ff928ae209501 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 12:57:30,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 12:57:30,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 12:57:30,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 12:57:30,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 12:57:30,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 12:57:30,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 12:57:30,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 12:57:30,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 12:57:30,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 12:57:30,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 12:57:30,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 12:57:30,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 12:57:30,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 12:57:30,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 12:57:30,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 12:57:30,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 12:57:30,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 12:57:30,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 12:57:30,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 12:57:30,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 12:57:30,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 12:57:30,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 12:57:30,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 12:57:30,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 12:57:30,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 12:57:30,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 12:57:30,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 12:57:30,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 12:57:30,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 12:57:30,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 12:57:30,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 12:57:30,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 12:57:30,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 12:57:30,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 12:57:30,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 12:57:30,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 12:57:30,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 12:57:30,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 12:57:30,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 12:57:30,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 12:57:30,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 12:57:30,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 12:57:30,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 12:57:30,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 12:57:30,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 12:57:30,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 12:57:30,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 12:57:30,832 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 12:57:30,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 12:57:30,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 12:57:30,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 12:57:30,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 12:57:30,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 12:57:30,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 12:57:30,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 12:57:30,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 12:57:30,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 12:57:30,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 12:57:30,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 12:57:30,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 12:57:30,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 12:57:30,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 12:57:30,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 12:57:30,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:57:30,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 12:57:30,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 12:57:30,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 12:57:30,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 12:57:30,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 12:57:30,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 12:57:30,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 12:57:30,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8205221af56d42ab3d3bf56969ff928ae209501 [2021-08-29 12:57:31,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 12:57:31,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 12:57:31,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 12:57:31,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 12:57:31,168 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 12:57:31,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2021-08-29 12:57:31,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f24c925c/2bd27f895d2e4c4a852f1d4afc40decc/FLAG6bbdde237 [2021-08-29 12:57:31,566 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 12:57:31,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2021-08-29 12:57:31,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f24c925c/2bd27f895d2e4c4a852f1d4afc40decc/FLAG6bbdde237 [2021-08-29 12:57:31,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f24c925c/2bd27f895d2e4c4a852f1d4afc40decc [2021-08-29 12:57:31,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 12:57:31,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 12:57:31,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 12:57:31,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 12:57:31,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 12:57:31,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ba243f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31, skipping insertion in model container [2021-08-29 12:57:31,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 12:57:31,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 12:57:31,753 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound50.c[524,537] [2021-08-29 12:57:31,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:57:31,788 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 12:57:31,801 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound50.c[524,537] [2021-08-29 12:57:31,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:57:31,851 INFO L208 MainTranslator]: Completed translation [2021-08-29 12:57:31,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31 WrapperNode [2021-08-29 12:57:31,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 12:57:31,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 12:57:31,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 12:57:31,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 12:57:31,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 12:57:31,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 12:57:31,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 12:57:31,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 12:57:31,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 12:57:31,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 12:57:31,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 12:57:31,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 12:57:31,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (1/1) ... [2021-08-29 12:57:31,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:57:31,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:31,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 12:57:31,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 12:57:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 12:57:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 12:57:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 12:57:31,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 12:57:32,132 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 12:57:32,132 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-29 12:57:32,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:57:32 BoogieIcfgContainer [2021-08-29 12:57:32,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 12:57:32,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 12:57:32,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 12:57:32,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 12:57:32,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 12:57:31" (1/3) ... [2021-08-29 12:57:32,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d58f228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:57:32, skipping insertion in model container [2021-08-29 12:57:32,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:57:31" (2/3) ... [2021-08-29 12:57:32,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d58f228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:57:32, skipping insertion in model container [2021-08-29 12:57:32,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:57:32" (3/3) ... [2021-08-29 12:57:32,146 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound50.c [2021-08-29 12:57:32,150 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 12:57:32,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-29 12:57:32,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 12:57:32,190 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 12:57:32,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-29 12:57:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 12:57:32,205 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:32,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:32,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-08-29 12:57:32,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:32,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243072493] [2021-08-29 12:57:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:32,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:32,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:32,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868436514] [2021-08-29 12:57:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:32,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:32,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:32,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:32,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 12:57:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:57:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-29 12:57:32,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:32,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:57:32,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:32,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243072493] [2021-08-29 12:57:32,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:32,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868436514] [2021-08-29 12:57:32,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868436514] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:57:32,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:57:32,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 12:57:32,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731831333] [2021-08-29 12:57:32,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 12:57:32,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 12:57:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:57:32,572 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:32,638 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-08-29 12:57:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 12:57:32,642 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 12:57:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:32,650 INFO L225 Difference]: With dead ends: 39 [2021-08-29 12:57:32,650 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 12:57:32,652 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:57:32,657 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.64ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:32,659 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 23 Unknown, 0 Unchecked, 0.24ms Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 54.64ms Time] [2021-08-29 12:57:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 12:57:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-29 12:57:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-29 12:57:32,684 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-08-29 12:57:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:32,684 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-29 12:57:32,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-29 12:57:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 12:57:32,687 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:32,687 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:32,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 12:57:32,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-08-29 12:57:32,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-08-29 12:57:32,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:32,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942595951] [2021-08-29 12:57:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:32,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:32,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:32,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758027440] [2021-08-29 12:57:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:32,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:32,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:32,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 12:57:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:57:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 12:57:33,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:33,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:57:33,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:33,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942595951] [2021-08-29 12:57:33,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:33,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758027440] [2021-08-29 12:57:33,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758027440] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:57:33,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:57:33,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:57:33,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862683868] [2021-08-29 12:57:33,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:57:33,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:57:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:57:33,196 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:35,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:57:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:35,743 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-08-29 12:57:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 12:57:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 12:57:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:35,745 INFO L225 Difference]: With dead ends: 34 [2021-08-29 12:57:35,745 INFO L226 Difference]: Without dead ends: 32 [2021-08-29 12:57:35,745 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.66ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:57:35,746 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2509.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2523.03ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:35,747 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 2523.03ms Time] [2021-08-29 12:57:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-29 12:57:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2021-08-29 12:57:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-08-29 12:57:35,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2021-08-29 12:57:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:35,765 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-08-29 12:57:35,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-08-29 12:57:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 12:57:35,766 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:35,766 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:35,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 12:57:35,972 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,SelfDestructingSolverStorable1 [2021-08-29 12:57:35,972 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-08-29 12:57:35,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:35,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959568586] [2021-08-29 12:57:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:35,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:35,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:35,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302760533] [2021-08-29 12:57:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:35,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:35,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:36,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 12:57:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:57:36,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 12:57:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:36,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:57:36,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:36,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959568586] [2021-08-29 12:57:36,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:36,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302760533] [2021-08-29 12:57:36,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302760533] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:57:36,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:57:36,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 12:57:36,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117015659] [2021-08-29 12:57:36,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:57:36,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:36,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:57:36,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:57:36,081 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:36,127 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-08-29 12:57:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:57:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 12:57:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:36,129 INFO L225 Difference]: With dead ends: 28 [2021-08-29 12:57:36,130 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 12:57:36,130 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.47ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:57:36,133 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.26ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:36,135 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 51 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 34.26ms Time] [2021-08-29 12:57:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 12:57:36,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-29 12:57:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-08-29 12:57:36,145 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2021-08-29 12:57:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:36,146 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-08-29 12:57:36,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-08-29 12:57:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 12:57:36,147 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:36,147 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:36,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 12:57:36,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:36,357 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-08-29 12:57:36,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:36,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419325539] [2021-08-29 12:57:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:36,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:36,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:36,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132265691] [2021-08-29 12:57:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:36,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:36,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:36,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:36,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 12:57:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:57:36,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 12:57:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:36,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:57:36,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:36,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419325539] [2021-08-29 12:57:36,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:36,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132265691] [2021-08-29 12:57:36,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132265691] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:57:36,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:57:36,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 12:57:36,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342737688] [2021-08-29 12:57:36,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 12:57:36,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:36,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 12:57:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-29 12:57:36,533 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:36,659 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-08-29 12:57:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 12:57:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 12:57:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:36,661 INFO L225 Difference]: With dead ends: 28 [2021-08-29 12:57:36,661 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 12:57:36,663 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.49ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-29 12:57:36,665 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.15ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:36,666 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 65.15ms Time] [2021-08-29 12:57:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 12:57:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-08-29 12:57:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-08-29 12:57:36,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-08-29 12:57:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:36,675 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-08-29 12:57:36,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-08-29 12:57:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 12:57:36,676 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:36,676 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:36,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-29 12:57:36,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:36,894 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:36,895 INFO L82 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2021-08-29 12:57:36,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:36,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539956947] [2021-08-29 12:57:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:36,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:36,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:36,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285804657] [2021-08-29 12:57:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:36,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:36,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:36,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 12:57:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:57:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 12:57:36,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:37,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:57:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:37,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:37,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539956947] [2021-08-29 12:57:37,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:37,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285804657] [2021-08-29 12:57:37,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285804657] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:57:37,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:57:37,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-29 12:57:37,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658952787] [2021-08-29 12:57:37,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 12:57:37,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 12:57:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-29 12:57:37,081 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:37,159 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-08-29 12:57:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 12:57:37,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 12:57:37,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:37,161 INFO L225 Difference]: With dead ends: 36 [2021-08-29 12:57:37,161 INFO L226 Difference]: Without dead ends: 32 [2021-08-29 12:57:37,162 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.28ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 12:57:37,162 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.36ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:37,164 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 51.36ms Time] [2021-08-29 12:57:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-29 12:57:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-29 12:57:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-29 12:57:37,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-08-29 12:57:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:37,177 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-29 12:57:37,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-29 12:57:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-29 12:57:37,178 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:37,178 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:37,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 12:57:37,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:37,397 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 2 times [2021-08-29 12:57:37,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:37,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581862516] [2021-08-29 12:57:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:37,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:37,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:37,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544550717] [2021-08-29 12:57:37,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 12:57:37,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:37,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:37,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:37,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 12:57:37,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 12:57:37,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:57:37,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 12:57:37,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:37,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:57:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:37,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:37,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581862516] [2021-08-29 12:57:37,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:37,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544550717] [2021-08-29 12:57:37,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544550717] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:57:37,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:57:37,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-29 12:57:37,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869841886] [2021-08-29 12:57:37,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 12:57:37,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:37,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 12:57:37,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-29 12:57:37,727 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:37,904 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2021-08-29 12:57:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-29 12:57:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-29 12:57:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:37,906 INFO L225 Difference]: With dead ends: 66 [2021-08-29 12:57:37,906 INFO L226 Difference]: Without dead ends: 62 [2021-08-29 12:57:37,906 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 132.17ms TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-08-29 12:57:37,907 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.59ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.33ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:37,907 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 129 Unknown, 0 Unchecked, 4.59ms Time], IncrementalHoareTripleChecker [13 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 82.33ms Time] [2021-08-29 12:57:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-29 12:57:37,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-29 12:57:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-29 12:57:37,916 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 31 [2021-08-29 12:57:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:37,916 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-29 12:57:37,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-29 12:57:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-29 12:57:37,926 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:37,926 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:37,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 12:57:38,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:38,149 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 3 times [2021-08-29 12:57:38,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:38,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706829045] [2021-08-29 12:57:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:38,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:38,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:38,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617994453] [2021-08-29 12:57:38,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 12:57:38,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:38,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:38,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 12:57:39,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-29 12:57:39,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:57:39,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 12:57:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:40,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:57:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:40,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:40,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706829045] [2021-08-29 12:57:40,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:40,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617994453] [2021-08-29 12:57:40,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617994453] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:57:40,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:57:40,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-29 12:57:40,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133434725] [2021-08-29 12:57:40,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-29 12:57:40,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-29 12:57:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-08-29 12:57:40,416 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:40,853 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2021-08-29 12:57:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-29 12:57:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-29 12:57:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:40,855 INFO L225 Difference]: With dead ends: 126 [2021-08-29 12:57:40,855 INFO L226 Difference]: Without dead ends: 122 [2021-08-29 12:57:40,856 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 449.82ms TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2021-08-29 12:57:40,856 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 113 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.09ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:40,857 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 0 Invalid, 212 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [27 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 166.09ms Time] [2021-08-29 12:57:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-29 12:57:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-08-29 12:57:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 121 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2021-08-29 12:57:40,874 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 61 [2021-08-29 12:57:40,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:40,875 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2021-08-29 12:57:40,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2021-08-29 12:57:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-29 12:57:40,876 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:40,877 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:40,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 12:57:41,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:41,079 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:41,079 INFO L82 PathProgramCache]: Analyzing trace with hash 433108203, now seen corresponding path program 4 times [2021-08-29 12:57:41,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:41,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923394464] [2021-08-29 12:57:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:41,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:41,089 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:41,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025494048] [2021-08-29 12:57:41,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 12:57:41,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:41,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:41,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:41,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 12:57:41,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 12:57:41,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:57:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-29 12:57:41,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:41,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:57:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:42,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:42,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923394464] [2021-08-29 12:57:42,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:42,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025494048] [2021-08-29 12:57:42,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025494048] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:57:42,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:57:42,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-08-29 12:57:42,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204537895] [2021-08-29 12:57:42,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-29 12:57:42,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:42,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-29 12:57:42,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-08-29 12:57:42,627 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:43,852 INFO L93 Difference]: Finished difference Result 246 states and 315 transitions. [2021-08-29 12:57:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-29 12:57:43,853 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-08-29 12:57:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:43,855 INFO L225 Difference]: With dead ends: 246 [2021-08-29 12:57:43,855 INFO L226 Difference]: Without dead ends: 242 [2021-08-29 12:57:43,858 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1639.69ms TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2021-08-29 12:57:43,858 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 230.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 306.86ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:43,858 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 389 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [48 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 306.86ms Time] [2021-08-29 12:57:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-29 12:57:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2021-08-29 12:57:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.1950207468879668) internal successors, (288), 241 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 288 transitions. [2021-08-29 12:57:43,909 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 288 transitions. Word has length 121 [2021-08-29 12:57:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:43,910 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 288 transitions. [2021-08-29 12:57:43,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 288 transitions. [2021-08-29 12:57:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-08-29 12:57:43,918 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:43,918 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:43,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 12:57:44,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-29 12:57:44,143 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2072351253, now seen corresponding path program 5 times [2021-08-29 12:57:44,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:44,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508486379] [2021-08-29 12:57:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:44,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:44,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:44,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139062343] [2021-08-29 12:57:44,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 12:57:44,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:44,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:44,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:44,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 12:57:44,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-08-29 12:57:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:57:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 95 conjunts are in the unsatisfiable core [2021-08-29 12:57:44,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:46,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:57:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:57:46,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:46,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508486379] [2021-08-29 12:57:46,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:46,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139062343] [2021-08-29 12:57:46,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139062343] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:57:46,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:57:46,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 53 [2021-08-29 12:57:46,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693320115] [2021-08-29 12:57:46,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-29 12:57:46,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:46,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-29 12:57:46,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2021-08-29 12:57:46,902 INFO L87 Difference]: Start difference. First operand 242 states and 288 transitions. Second operand has 54 states, 54 states have (on average 4.888888888888889) internal successors, (264), 53 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:48,190 INFO L93 Difference]: Finished difference Result 266 states and 319 transitions. [2021-08-29 12:57:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-29 12:57:48,191 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.888888888888889) internal successors, (264), 53 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-08-29 12:57:48,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:48,192 INFO L225 Difference]: With dead ends: 266 [2021-08-29 12:57:48,192 INFO L226 Difference]: Without dead ends: 262 [2021-08-29 12:57:48,194 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 427 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1885.16ms TimeCoverageRelationStatistics Valid=3926, Invalid=6580, Unknown=0, NotChecked=0, Total=10506 [2021-08-29 12:57:48,195 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 170 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 284.87ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:48,195 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 0 Invalid, 356 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [3 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 284.87ms Time] [2021-08-29 12:57:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-29 12:57:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-08-29 12:57:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.1954022988505748) internal successors, (312), 261 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 312 transitions. [2021-08-29 12:57:48,215 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 312 transitions. Word has length 241 [2021-08-29 12:57:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:48,215 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 312 transitions. [2021-08-29 12:57:48,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.888888888888889) internal successors, (264), 53 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 312 transitions. [2021-08-29 12:57:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-08-29 12:57:48,218 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:48,218 INFO L513 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:48,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 12:57:48,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:48,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:57:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:48,426 INFO L82 PathProgramCache]: Analyzing trace with hash -64907413, now seen corresponding path program 6 times [2021-08-29 12:57:48,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:48,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829310316] [2021-08-29 12:57:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:48,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:48,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:48,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577915129] [2021-08-29 12:57:48,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 12:57:48,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:48,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:57:48,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 12:58:24,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2021-08-29 12:58:24,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-29 12:58:24,324 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 12:58:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 12:58:24,737 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 12:58:24,738 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 12:58:24,738 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-08-29 12:58:24,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-08-29 12:58:24,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 12:58:24,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 12:58:24,966 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 12:58:25,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 12:58:25 BoogieIcfgContainer [2021-08-29 12:58:25,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 12:58:25,093 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 12:58:25,093 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 12:58:25,093 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 12:58:25,094 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:57:32" (3/4) ... [2021-08-29 12:58:25,095 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 12:58:25,204 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 12:58:25,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 12:58:25,204 INFO L158 Benchmark]: Toolchain (without parser) took 53617.64ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 39.2MB in the beginning and 51.4MB in the end (delta: -12.2MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2021-08-29 12:58:25,205 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 41.7MB in the beginning and 41.6MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:58:25,205 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.90ms. Allocated memory is still 60.8MB. Free memory was 39.0MB in the beginning and 44.1MB in the end (delta: -5.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 12:58:25,205 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.54ms. Allocated memory is still 60.8MB. Free memory was 43.9MB in the beginning and 42.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:58:25,206 INFO L158 Benchmark]: Boogie Preprocessor took 39.62ms. Allocated memory is still 60.8MB. Free memory was 42.4MB in the beginning and 41.4MB in the end (delta: 968.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:58:25,206 INFO L158 Benchmark]: RCFGBuilder took 206.19ms. Allocated memory is still 60.8MB. Free memory was 41.2MB in the beginning and 32.5MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 12:58:25,207 INFO L158 Benchmark]: TraceAbstraction took 52957.61ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 32.2MB in the beginning and 31.5MB in the end (delta: 673.9kB). Peak memory consumption was 34.6MB. Max. memory is 16.1GB. [2021-08-29 12:58:25,207 INFO L158 Benchmark]: Witness Printer took 110.90ms. Allocated memory is still 79.7MB. Free memory was 31.5MB in the beginning and 51.4MB in the end (delta: -20.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-29 12:58:25,209 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 41.7MB in the beginning and 41.6MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.90ms. Allocated memory is still 60.8MB. Free memory was 39.0MB in the beginning and 44.1MB in the end (delta: -5.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.54ms. Allocated memory is still 60.8MB. Free memory was 43.9MB in the beginning and 42.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.62ms. Allocated memory is still 60.8MB. Free memory was 42.4MB in the beginning and 41.4MB in the end (delta: 968.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 206.19ms. Allocated memory is still 60.8MB. Free memory was 41.2MB in the beginning and 32.5MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 52957.61ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 32.2MB in the beginning and 31.5MB in the end (delta: 673.9kB). Peak memory consumption was 34.6MB. Max. memory is 16.1GB. * Witness Printer took 110.90ms. Allocated memory is still 79.7MB. Free memory was 31.5MB in the beginning and 51.4MB in the end (delta: -20.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L9] COND FALSE !(!cond) VAL [counter=0] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(r != 0)) VAL [counter=2] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L36] COND FALSE !(!(r != 0)) VAL [counter=3] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=3] [L34] EXPR counter++ VAL [counter=4] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L36] COND FALSE !(!(r != 0)) VAL [counter=4] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=4] [L34] EXPR counter++ VAL [counter=5] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L36] COND FALSE !(!(r != 0)) VAL [counter=5] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=5] [L34] EXPR counter++ VAL [counter=6] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=6] [L36] COND FALSE !(!(r != 0)) VAL [counter=6] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=7] [L36] COND FALSE !(!(r != 0)) VAL [counter=7] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=7] [L34] EXPR counter++ VAL [counter=8] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=8] [L36] COND FALSE !(!(r != 0)) VAL [counter=8] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=8] [L34] EXPR counter++ VAL [counter=9] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=9] [L36] COND FALSE !(!(r != 0)) VAL [counter=9] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=9] [L34] EXPR counter++ VAL [counter=10] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=10] [L36] COND FALSE !(!(r != 0)) VAL [counter=10] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=11] [L36] COND FALSE !(!(r != 0)) VAL [counter=11] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=11] [L34] EXPR counter++ VAL [counter=12] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=12] [L36] COND FALSE !(!(r != 0)) VAL [counter=12] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=12] [L34] EXPR counter++ VAL [counter=13] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=13] [L36] COND FALSE !(!(r != 0)) VAL [counter=13] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=13] [L34] EXPR counter++ VAL [counter=14] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=14] [L36] COND FALSE !(!(r != 0)) VAL [counter=14] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=14] [L34] EXPR counter++ VAL [counter=15] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=15] [L36] COND FALSE !(!(r != 0)) VAL [counter=15] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=15] [L34] EXPR counter++ VAL [counter=16] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=16] [L36] COND FALSE !(!(r != 0)) VAL [counter=16] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=16] [L34] EXPR counter++ VAL [counter=17] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=17] [L36] COND FALSE !(!(r != 0)) VAL [counter=17] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=17] [L34] EXPR counter++ VAL [counter=18] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=18] [L36] COND FALSE !(!(r != 0)) VAL [counter=18] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=18] [L34] EXPR counter++ VAL [counter=19] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=19] [L36] COND FALSE !(!(r != 0)) VAL [counter=19] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=19] [L34] EXPR counter++ VAL [counter=20] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=20] [L36] COND FALSE !(!(r != 0)) VAL [counter=20] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=20] [L34] EXPR counter++ VAL [counter=21] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=21] [L36] COND FALSE !(!(r != 0)) VAL [counter=21] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=21] [L34] EXPR counter++ VAL [counter=22] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=22] [L36] COND FALSE !(!(r != 0)) VAL [counter=22] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=22] [L34] EXPR counter++ VAL [counter=23] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=23] [L36] COND FALSE !(!(r != 0)) VAL [counter=23] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=23] [L34] EXPR counter++ VAL [counter=24] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=24] [L36] COND FALSE !(!(r != 0)) VAL [counter=24] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=24] [L34] EXPR counter++ VAL [counter=25] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=25] [L36] COND FALSE !(!(r != 0)) VAL [counter=25] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=25] [L34] EXPR counter++ VAL [counter=26] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=26] [L36] COND FALSE !(!(r != 0)) VAL [counter=26] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=26] [L34] EXPR counter++ VAL [counter=27] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=27] [L36] COND FALSE !(!(r != 0)) VAL [counter=27] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=27] [L34] EXPR counter++ VAL [counter=28] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=28] [L36] COND FALSE !(!(r != 0)) VAL [counter=28] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=28] [L34] EXPR counter++ VAL [counter=29] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=29] [L36] COND FALSE !(!(r != 0)) VAL [counter=29] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=29] [L34] EXPR counter++ VAL [counter=30] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=30] [L36] COND FALSE !(!(r != 0)) VAL [counter=30] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=30] [L34] EXPR counter++ VAL [counter=31] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=31] [L36] COND FALSE !(!(r != 0)) VAL [counter=31] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=31] [L34] EXPR counter++ VAL [counter=32] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=32] [L36] COND FALSE !(!(r != 0)) VAL [counter=32] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=32] [L34] EXPR counter++ VAL [counter=33] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=33] [L36] COND FALSE !(!(r != 0)) VAL [counter=33] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=33] [L34] EXPR counter++ VAL [counter=34] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=34] [L36] COND FALSE !(!(r != 0)) VAL [counter=34] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=34] [L34] EXPR counter++ VAL [counter=35] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=35] [L36] COND FALSE !(!(r != 0)) VAL [counter=35] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=35] [L34] EXPR counter++ VAL [counter=36] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=36] [L36] COND FALSE !(!(r != 0)) VAL [counter=36] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=36] [L34] EXPR counter++ VAL [counter=37] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=37] [L36] COND FALSE !(!(r != 0)) VAL [counter=37] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=37] [L34] EXPR counter++ VAL [counter=38] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=38] [L36] COND FALSE !(!(r != 0)) VAL [counter=38] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=38] [L34] EXPR counter++ VAL [counter=39] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=39] [L36] COND FALSE !(!(r != 0)) VAL [counter=39] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=39] [L34] EXPR counter++ VAL [counter=40] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=40] [L36] COND FALSE !(!(r != 0)) VAL [counter=40] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=40] [L34] EXPR counter++ VAL [counter=41] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=41] [L36] COND FALSE !(!(r != 0)) VAL [counter=41] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=41] [L34] EXPR counter++ VAL [counter=42] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=42] [L36] COND FALSE !(!(r != 0)) VAL [counter=42] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=42] [L34] EXPR counter++ VAL [counter=43] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=43] [L36] COND FALSE !(!(r != 0)) VAL [counter=43] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=43] [L34] EXPR counter++ VAL [counter=44] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=44] [L36] COND FALSE !(!(r != 0)) VAL [counter=44] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=44] [L34] EXPR counter++ VAL [counter=45] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=45] [L36] COND FALSE !(!(r != 0)) VAL [counter=45] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=45] [L34] EXPR counter++ VAL [counter=46] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=46] [L36] COND FALSE !(!(r != 0)) VAL [counter=46] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=46] [L34] EXPR counter++ VAL [counter=47] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=47] [L36] COND FALSE !(!(r != 0)) VAL [counter=47] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=47] [L34] EXPR counter++ VAL [counter=48] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=48] [L36] COND FALSE !(!(r != 0)) VAL [counter=48] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=48] [L34] EXPR counter++ VAL [counter=49] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=49] [L36] COND FALSE !(!(r != 0)) VAL [counter=49] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=49] [L34] EXPR counter++ VAL [counter=50] [L34] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) VAL [counter=50] [L36] COND FALSE !(!(r != 0)) VAL [counter=50] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [counter=50] [L34] EXPR counter++ VAL [counter=51] [L34] COND FALSE !(counter++<50) [L12] COND TRUE !(cond) VAL [counter=51] [L14] reach_error() VAL [counter=51] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 52781.30ms, OverallIterations: 10, TraceHistogramMax: 51, EmptinessCheckTime: 23.92ms, AutomataDifference: 6106.10ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.64ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 578 SdHoareTripleChecker+Valid, 3568.59ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 578 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3321.75ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 770 mSDsCounter, 113 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1270 IncrementalHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 113 mSolverCounterUnsat, 0 mSDtfsCounter, 1270 mSolverCounterSat, 17.27ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1101 GetRequests, 820 SyntacticMatches, 1 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 4251.79ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=9, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 152.24ms AutomataMinimizationTime, 9 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 118.11ms SsaConstructionTime, 38320.99ms SatisfiabilityAnalysisTime, 4803.32ms InterpolantComputationTime, 775 NumberOfCodeBlocks, 775 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 970 ConstructedInterpolants, 0 QuantifiedInterpolants, 2934 SizeOfPredicates, 96 NumberOfNonLiveVariables, 1952 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 0/13502 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 12:58:25,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...