./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.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 136b155e37e2c6593adc196e1d46b83f5765a5c4 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-dev-20ed64e [2021-08-26 06:09:30,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 06:09:30,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 06:09:30,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 06:09:30,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 06:09:30,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 06:09:30,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 06:09:30,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 06:09:30,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 06:09:30,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 06:09:30,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 06:09:30,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 06:09:30,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 06:09:30,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 06:09:30,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 06:09:30,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 06:09:30,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 06:09:30,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 06:09:30,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 06:09:30,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 06:09:30,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 06:09:30,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 06:09:30,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 06:09:30,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 06:09:30,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 06:09:30,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 06:09:30,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 06:09:30,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 06:09:30,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 06:09:30,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 06:09:30,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 06:09:30,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 06:09:30,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 06:09:30,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 06:09:30,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 06:09:30,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 06:09:30,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 06:09:30,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 06:09:30,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 06:09:30,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 06:09:30,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 06:09:30,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 06:09:30,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 06:09:30,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 06:09:30,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 06:09:30,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 06:09:30,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 06:09:30,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 06:09:30,850 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 06:09:30,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 06:09:30,850 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 06:09:30,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 06:09:30,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 06:09:30,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 06:09:30,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 06:09:30,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 06:09:30,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 06:09:30,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 06:09:30,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 06:09:30,852 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 06:09:30,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 06:09:30,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 06:09:30,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 06:09:30,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 06:09:30,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 06:09:30,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 06:09:30,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 06:09:30,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 06:09:30,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 06:09:30,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 06:09:30,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 06:09:30,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 06:09:30,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 136b155e37e2c6593adc196e1d46b83f5765a5c4 [2021-08-26 06:09:31,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 06:09:31,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 06:09:31,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 06:09:31,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 06:09:31,164 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 06:09:31,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2021-08-26 06:09:31,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d731f2981/8a9350a943b04f73b6b282f17f11a6cf/FLAGfc3fc7cab [2021-08-26 06:09:31,574 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 06:09:31,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2021-08-26 06:09:31,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d731f2981/8a9350a943b04f73b6b282f17f11a6cf/FLAGfc3fc7cab [2021-08-26 06:09:31,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d731f2981/8a9350a943b04f73b6b282f17f11a6cf [2021-08-26 06:09:31,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 06:09:31,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 06:09:31,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 06:09:31,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 06:09:31,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 06:09:31,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:09:31" (1/1) ... [2021-08-26 06:09:31,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2651945f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:31, skipping insertion in model container [2021-08-26 06:09:31,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:09:31" (1/1) ... [2021-08-26 06:09:31,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 06:09:31,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 06:09:32,124 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/fermat1-ll_unwindbound2.c[535,548] [2021-08-26 06:09:32,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 06:09:32,158 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 06:09:32,201 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/fermat1-ll_unwindbound2.c[535,548] [2021-08-26 06:09:32,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 06:09:32,235 INFO L208 MainTranslator]: Completed translation [2021-08-26 06:09:32,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32 WrapperNode [2021-08-26 06:09:32,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 06:09:32,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 06:09:32,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 06:09:32,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 06:09:32,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 06:09:32,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 06:09:32,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 06:09:32,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 06:09:32,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 06:09:32,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 06:09:32,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 06:09:32,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 06:09:32,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (1/1) ... [2021-08-26 06:09:32,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 06:09:32,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:09:32,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 06:09:32,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 06:09:32,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 06:09:32,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 06:09:32,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 06:09:32,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 06:09:32,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 06:09:32,721 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-08-26 06:09:32,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:09:32 BoogieIcfgContainer [2021-08-26 06:09:32,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 06:09:32,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 06:09:32,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 06:09:32,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 06:09:32,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:09:31" (1/3) ... [2021-08-26 06:09:32,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0f296c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:09:32, skipping insertion in model container [2021-08-26 06:09:32,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:09:32" (2/3) ... [2021-08-26 06:09:32,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0f296c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:09:32, skipping insertion in model container [2021-08-26 06:09:32,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:09:32" (3/3) ... [2021-08-26 06:09:32,753 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound2.c [2021-08-26 06:09:32,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 06:09:32,759 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-08-26 06:09:32,804 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 06:09:32,809 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 06:09:32,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-26 06:09:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:09:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 06:09:32,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:09:32,824 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:09:32,825 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 06:09:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:09:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1233832305, now seen corresponding path program 1 times [2021-08-26 06:09:32,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:09:32,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685489882] [2021-08-26 06:09:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:32,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:09:32,904 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:09:32,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912750294] [2021-08-26 06:09:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:32,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:09:32,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:09:32,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 06:09:32,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 06:09:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:09:33,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 06:09:33,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:09:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:09:33,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:09:33,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685489882] [2021-08-26 06:09:33,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:09:33,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912750294] [2021-08-26 06:09:33,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912750294] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:09:33,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:09:33,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 06:09:33,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105972756] [2021-08-26 06:09:33,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 06:09:33,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:09:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 06:09:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 06:09:33,126 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 31 states have internal predecessors, (46), 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) [2021-08-26 06:09:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:09:33,142 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2021-08-26 06:09:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 06:09:33,144 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 [2021-08-26 06:09:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:09:33,150 INFO L225 Difference]: With dead ends: 61 [2021-08-26 06:09:33,150 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 06:09:33,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 06:09:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 06:09:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-26 06:09:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:09:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-08-26 06:09:33,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2021-08-26 06:09:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:09:33,180 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-08-26 06:09:33,180 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) [2021-08-26 06:09:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-08-26 06:09:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 06:09:33,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:09:33,181 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:09:33,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 06:09:33,402 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 [2021-08-26 06:09:33,402 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 06:09:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:09:33,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-08-26 06:09:33,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:09:33,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423605753] [2021-08-26 06:09:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:33,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:09:33,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:09:33,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169957709] [2021-08-26 06:09:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:33,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:09:33,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:09:33,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 06:09:33,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 06:09:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:09:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 06:09:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:09:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:09:33,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:09:33,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423605753] [2021-08-26 06:09:33,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:09:33,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169957709] [2021-08-26 06:09:33,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169957709] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:09:33,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:09:33,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 06:09:33,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535348600] [2021-08-26 06:09:33,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 06:09:33,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:09:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 06:09:33,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 06:09:33,748 INFO L87 Difference]: Start difference. First operand 28 states and 33 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) [2021-08-26 06:09:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:09:37,706 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-08-26 06:09:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 06:09:37,708 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 [2021-08-26 06:09:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:09:37,710 INFO L225 Difference]: With dead ends: 60 [2021-08-26 06:09:37,710 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 06:09:37,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 06:09:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 06:09:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2021-08-26 06:09:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:09:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-08-26 06:09:37,723 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 10 [2021-08-26 06:09:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:09:37,724 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-08-26 06:09:37,725 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) [2021-08-26 06:09:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-08-26 06:09:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 06:09:37,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:09:37,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:09:37,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 06:09:37,944 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 [2021-08-26 06:09:37,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 06:09:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:09:37,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1507375428, now seen corresponding path program 1 times [2021-08-26 06:09:37,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:09:37,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102516831] [2021-08-26 06:09:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:37,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:09:37,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:09:37,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884495867] [2021-08-26 06:09:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:37,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:09:37,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:09:37,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 06:09:37,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 06:09:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:09:38,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 06:09:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:09:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:09:38,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:09:38,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102516831] [2021-08-26 06:09:38,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:09:38,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884495867] [2021-08-26 06:09:38,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884495867] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:09:38,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:09:38,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 06:09:38,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250417547] [2021-08-26 06:09:38,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 06:09:38,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:09:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 06:09:38,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 06:09:38,152 INFO L87 Difference]: Start difference. First operand 40 states and 51 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) [2021-08-26 06:09:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:09:38,170 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-08-26 06:09:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 06:09:38,170 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 [2021-08-26 06:09:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:09:38,172 INFO L225 Difference]: With dead ends: 46 [2021-08-26 06:09:38,172 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 06:09:38,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 06:09:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 06:09:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-26 06:09:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.394736842105263) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:09:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-08-26 06:09:38,178 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 11 [2021-08-26 06:09:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:09:38,179 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-08-26 06:09:38,179 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) [2021-08-26 06:09:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-08-26 06:09:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 06:09:38,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:09:38,180 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:09:38,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 06:09:38,402 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 [2021-08-26 06:09:38,402 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 06:09:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:09:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1189409771, now seen corresponding path program 1 times [2021-08-26 06:09:38,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:09:38,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455676275] [2021-08-26 06:09:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:38,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:09:38,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:09:38,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601832039] [2021-08-26 06:09:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:38,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:09:38,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:09:38,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 06:09:38,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 06:09:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:09:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 06:09:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:09:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:09:38,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:09:38,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455676275] [2021-08-26 06:09:38,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:09:38,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601832039] [2021-08-26 06:09:38,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601832039] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:09:38,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:09:38,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 06:09:38,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253165972] [2021-08-26 06:09:38,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 06:09:38,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:09:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 06:09:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 06:09:38,648 INFO L87 Difference]: Start difference. First operand 42 states and 53 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) [2021-08-26 06:09:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:09:38,829 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-08-26 06:09:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 06:09:38,830 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 [2021-08-26 06:09:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:09:38,830 INFO L225 Difference]: With dead ends: 46 [2021-08-26 06:09:38,831 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 06:09:38,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-26 06:09:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 06:09:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-08-26 06:09:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-08-26 06:09:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-08-26 06:09:38,835 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2021-08-26 06:09:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:09:38,835 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-08-26 06:09:38,836 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) [2021-08-26 06:09:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-08-26 06:09:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 06:09:38,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:09:38,836 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:09:38,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 06:09:39,037 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 [2021-08-26 06:09:39,037 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 06:09:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:09:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash -112841942, now seen corresponding path program 1 times [2021-08-26 06:09:39,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:09:39,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978596897] [2021-08-26 06:09:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:39,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:09:39,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:09:39,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582460605] [2021-08-26 06:09:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:39,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:09:39,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:09:39,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 06:09:39,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 06:09:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:09:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 06:09:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:09:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:09:39,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:09:39,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978596897] [2021-08-26 06:09:39,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:09:39,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582460605] [2021-08-26 06:09:39,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582460605] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:09:39,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:09:39,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 06:09:39,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947958164] [2021-08-26 06:09:39,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 06:09:39,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:09:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 06:09:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 06:09:39,211 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:09:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:09:39,230 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-08-26 06:09:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 06:09:39,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 06:09:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:09:39,232 INFO L225 Difference]: With dead ends: 44 [2021-08-26 06:09:39,232 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 06:09:39,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 06:09:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 06:09:39,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-26 06:09:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:09:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-08-26 06:09:39,237 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2021-08-26 06:09:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:09:39,238 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-08-26 06:09:39,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:09:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-08-26 06:09:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 06:09:39,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:09:39,239 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:09:39,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 06:09:39,456 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 [2021-08-26 06:09:39,457 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 06:09:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:09:39,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1045325853, now seen corresponding path program 1 times [2021-08-26 06:09:39,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:09:39,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333466593] [2021-08-26 06:09:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:39,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:09:39,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:09:39,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507861434] [2021-08-26 06:09:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:09:39,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:09:39,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:09:39,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 06:09:39,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 06:09:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 06:09:39,573 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 06:09:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 06:09:39,634 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 06:09:39,648 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 06:09:39,650 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 06:09:39,651 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 06:09:39,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 06:09:39,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 06:09:39,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-26 06:09:39,872 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 [2021-08-26 06:09:39,878 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 06:09:39,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:09:39 BoogieIcfgContainer [2021-08-26 06:09:39,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 06:09:39,902 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 06:09:39,902 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 06:09:39,902 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 06:09:39,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:09:32" (3/4) ... [2021-08-26 06:09:39,904 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 06:09:39,936 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 06:09:39,937 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 06:09:39,938 INFO L168 Benchmark]: Toolchain (without parser) took 7969.54 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 47.5 MB in the beginning and 65.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-08-26 06:09:39,938 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 67.1 MB. Free memory was 48.0 MB in the beginning and 47.9 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 06:09:39,939 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.19 ms. Allocated memory is still 67.1 MB. Free memory was 47.2 MB in the beginning and 49.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-08-26 06:09:39,939 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.71 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 47.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 06:09:39,939 INFO L168 Benchmark]: Boogie Preprocessor took 34.20 ms. Allocated memory is still 67.1 MB. Free memory was 47.4 MB in the beginning and 46.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 06:09:39,940 INFO L168 Benchmark]: RCFGBuilder took 404.75 ms. Allocated memory is still 67.1 MB. Free memory was 46.1 MB in the beginning and 47.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-08-26 06:09:39,940 INFO L168 Benchmark]: TraceAbstraction took 7160.41 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 47.3 MB in the beginning and 68.6 MB in the end (delta: -21.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-08-26 06:09:39,940 INFO L168 Benchmark]: Witness Printer took 35.21 ms. Allocated memory is still 94.4 MB. Free memory was 68.6 MB in the beginning and 65.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 06:09:39,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 67.1 MB. Free memory was 48.0 MB in the beginning and 47.9 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.19 ms. Allocated memory is still 67.1 MB. Free memory was 47.2 MB in the beginning and 49.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.71 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 47.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.20 ms. Allocated memory is still 67.1 MB. Free memory was 47.4 MB in the beginning and 46.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 404.75 ms. Allocated memory is still 67.1 MB. Free memory was 46.1 MB in the beginning and 47.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7160.41 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 47.3 MB in the beginning and 68.6 MB in the end (delta: -21.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Witness Printer took 35.21 ms. Allocated memory is still 94.4 MB. Free memory was 68.6 MB in the beginning and 65.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L39] EXPR counter++ VAL [counter=2] [L39] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L41] COND TRUE !(r > 0) VAL [counter=2] [L47] EXPR counter++ VAL [counter=3] [L47] COND FALSE !(counter++<2) [L34] EXPR counter++ VAL [counter=4] [L34] COND FALSE !(counter++<2) [L12] COND TRUE !(cond) VAL [counter=4] [L14] reach_error() VAL [counter=4] - 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. - 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. - 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, 32 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 7073.6ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 9.3ms, AutomataDifference: 4229.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 128 SDtfs, 81 SDslu, 162 SDs, 0 SdLazy, 101 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4014.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 132.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.7ms SsaConstructionTime, 130.2ms SatisfiabilityAnalysisTime, 635.2ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 244 SizeOfPredicates, 14 NumberOfNonLiveVariables, 369 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 2/2 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! [2021-08-26 06:09:39,959 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...