./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.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/fermat2-ll_unwindbound1.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 8251af2347cde8f45ce455b5c28163de05dea3ef ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 06:13:11,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 06:13:11,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 06:13:11,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 06:13:11,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 06:13:11,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 06:13:11,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 06:13:11,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 06:13:11,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 06:13:11,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 06:13:11,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 06:13:11,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 06:13:11,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 06:13:11,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 06:13:11,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 06:13:11,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 06:13:11,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 06:13:11,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 06:13:11,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 06:13:11,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 06:13:11,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 06:13:11,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 06:13:11,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 06:13:11,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 06:13:11,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 06:13:11,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 06:13:11,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 06:13:11,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 06:13:11,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 06:13:11,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 06:13:11,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 06:13:11,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 06:13:11,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 06:13:11,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 06:13:11,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 06:13:11,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 06:13:11,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 06:13:11,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 06:13:11,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 06:13:11,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 06:13:11,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 06:13:11,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 06:13:11,842 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 06:13:11,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 06:13:11,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 06:13:11,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 06:13:11,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 06:13:11,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 06:13:11,846 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 06:13:11,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 06:13:11,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 06:13:11,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 06:13:11,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 06:13:11,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 06:13:11,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 06:13:11,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 06:13:11,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 06:13:11,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 06:13:11,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 06:13:11,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 06:13:11,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 06:13:11,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 06:13:11,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 06:13:11,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 06:13:11,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 06:13:11,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 06:13:11,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 06:13:11,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 06:13:11,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 06:13:11,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 06:13:11,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 06:13:11,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 06:13:11,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8251af2347cde8f45ce455b5c28163de05dea3ef [2021-08-26 06:13:12,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 06:13:12,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 06:13:12,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 06:13:12,102 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 06:13:12,103 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 06:13:12,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2021-08-26 06:13:12,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77e5b508e/abe6cf165d2f4ad2b15d580cee408cf5/FLAG3d85cc6cb [2021-08-26 06:13:12,535 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 06:13:12,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2021-08-26 06:13:12,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77e5b508e/abe6cf165d2f4ad2b15d580cee408cf5/FLAG3d85cc6cb [2021-08-26 06:13:12,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77e5b508e/abe6cf165d2f4ad2b15d580cee408cf5 [2021-08-26 06:13:12,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 06:13:12,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 06:13:12,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 06:13:12,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 06:13:12,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 06:13:12,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0efcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12, skipping insertion in model container [2021-08-26 06:13:12,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 06:13:12,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 06:13:12,672 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_unwindbound1.c[524,537] [2021-08-26 06:13:12,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 06:13:12,687 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 06:13:12,695 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_unwindbound1.c[524,537] [2021-08-26 06:13:12,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 06:13:12,731 INFO L208 MainTranslator]: Completed translation [2021-08-26 06:13:12,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12 WrapperNode [2021-08-26 06:13:12,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 06:13:12,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 06:13:12,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 06:13:12,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 06:13:12,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 06:13:12,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 06:13:12,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 06:13:12,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 06:13:12,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 06:13:12,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 06:13:12,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 06:13:12,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 06:13:12,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (1/1) ... [2021-08-26 06:13:12,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 06:13:12,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:13:12,822 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 06:13:12,868 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 06:13:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 06:13:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 06:13:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 06:13:12,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 06:13:13,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 06:13:13,114 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-26 06:13:13,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:13:13 BoogieIcfgContainer [2021-08-26 06:13:13,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 06:13:13,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 06:13:13,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 06:13:13,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 06:13:13,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:13:12" (1/3) ... [2021-08-26 06:13:13,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556f5d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:13:13, skipping insertion in model container [2021-08-26 06:13:13,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:13:12" (2/3) ... [2021-08-26 06:13:13,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556f5d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:13:13, skipping insertion in model container [2021-08-26 06:13:13,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:13:13" (3/3) ... [2021-08-26 06:13:13,121 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound1.c [2021-08-26 06:13:13,124 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 06:13:13,125 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 06:13:13,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 06:13:13,174 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 06:13:13,174 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 06:13:13,183 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) [2021-08-26 06:13:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 06:13:13,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:13:13,199 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:13:13,199 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:13:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:13:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-08-26 06:13:13,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:13:13,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181269912] [2021-08-26 06:13:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:13,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:13:13,287 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:13:13,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939183167] [2021-08-26 06:13:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:13,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:13:13,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:13:13,305 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 06:13:13,307 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 06:13:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:13:13,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 06:13:13,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:13:13,460 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 06:13:13,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:13:13,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181269912] [2021-08-26 06:13:13,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:13:13,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939183167] [2021-08-26 06:13:13,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939183167] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:13:13,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:13:13,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 06:13:13,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40796118] [2021-08-26 06:13:13,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 06:13:13,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:13:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 06:13:13,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 06:13:13,477 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) [2021-08-26 06:13:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:13:13,486 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-08-26 06:13:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 06:13:13,487 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 06:13:13,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:13:13,492 INFO L225 Difference]: With dead ends: 39 [2021-08-26 06:13:13,492 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 06:13:13,494 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 06:13:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 06:13:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-26 06:13:13,512 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) [2021-08-26 06:13:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-26 06:13:13,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-08-26 06:13:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:13:13,513 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-26 06:13:13,514 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 06:13:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-26 06:13:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 06:13:13,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:13:13,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:13:13,535 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 06:13:13,733 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 06:13:13,733 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:13:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:13:13,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-08-26 06:13:13,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:13:13,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000926830] [2021-08-26 06:13:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:13,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:13:13,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:13:13,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173746520] [2021-08-26 06:13:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:13,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:13:13,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:13:13,746 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 06:13:13,747 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 06:13:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:13:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 06:13:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:13:14,034 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 06:13:14,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:13:14,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000926830] [2021-08-26 06:13:14,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:13:14,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173746520] [2021-08-26 06:13:14,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173746520] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:13:14,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:13:14,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 06:13:14,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814730704] [2021-08-26 06:13:14,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 06:13:14,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:13:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 06:13:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 06:13:14,039 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) [2021-08-26 06:13:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:13:19,860 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-08-26 06:13:19,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 06:13:19,860 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 06:13:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:13:19,861 INFO L225 Difference]: With dead ends: 32 [2021-08-26 06:13:19,861 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 06:13:19,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 06:13:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 06:13:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-08-26 06:13:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 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 06:13:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-08-26 06:13:19,865 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2021-08-26 06:13:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:13:19,865 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-08-26 06:13:19,865 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 06:13:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-08-26 06:13:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 06:13:19,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:13:19,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:13:19,880 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 06:13:20,069 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 06:13:20,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:13:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:13:20,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-08-26 06:13:20,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:13:20,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893319033] [2021-08-26 06:13:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:20,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:13:20,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:13:20,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269499146] [2021-08-26 06:13:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:20,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:13:20,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:13:20,083 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 06:13:20,096 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 06:13:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:13:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 06:13:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:13:20,234 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 06:13:20,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:13:20,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893319033] [2021-08-26 06:13:20,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:13:20,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269499146] [2021-08-26 06:13:20,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269499146] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:13:20,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:13:20,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 06:13:20,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312128196] [2021-08-26 06:13:20,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 06:13:20,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:13:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 06:13:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 06:13:20,241 INFO L87 Difference]: Start difference. First operand 20 states and 23 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 06:13:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:13:20,250 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-08-26 06:13:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 06:13:20,250 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 06:13:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:13:20,251 INFO L225 Difference]: With dead ends: 24 [2021-08-26 06:13:20,251 INFO L226 Difference]: Without dead ends: 20 [2021-08-26 06:13:20,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 06:13:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-26 06:13:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-26 06:13:20,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:13:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-26 06:13:20,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-08-26 06:13:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:13:20,253 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-26 06:13:20,253 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 06:13:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-26 06:13:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 06:13:20,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:13:20,254 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:13:20,286 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 06:13:20,454 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 06:13:20,455 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:13:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:13:20,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-08-26 06:13:20,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:13:20,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851130729] [2021-08-26 06:13:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:20,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:13:20,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:13:20,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067219169] [2021-08-26 06:13:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:20,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:13:20,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:13:20,469 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 06:13:20,470 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 06:13:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:13:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 06:13:20,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:13:20,668 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 06:13:20,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:13:20,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851130729] [2021-08-26 06:13:20,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:13:20,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067219169] [2021-08-26 06:13:20,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067219169] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:13:20,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:13:20,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 06:13:20,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180512699] [2021-08-26 06:13:20,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 06:13:20,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:13:20,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 06:13:20,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 06:13:20,671 INFO L87 Difference]: Start difference. First operand 20 states and 22 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 06:13:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:13:20,776 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-08-26 06:13:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 06:13:20,776 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 06:13:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:13:20,777 INFO L225 Difference]: With dead ends: 24 [2021-08-26 06:13:20,777 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 06:13:20,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-26 06:13:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 06:13:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-08-26 06:13:20,779 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) [2021-08-26 06:13:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-08-26 06:13:20,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-08-26 06:13:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:13:20,780 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-08-26 06:13:20,780 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 06:13:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-08-26 06:13:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 06:13:20,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:13:20,780 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:13:20,803 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 06:13:21,001 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 06:13:21,001 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:13:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:13:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2021-08-26 06:13:21,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:13:21,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995122829] [2021-08-26 06:13:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:21,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:13:21,008 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:13:21,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500458450] [2021-08-26 06:13:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:13:21,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:13:21,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:13:21,011 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 06:13:21,012 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 06:13:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 06:13:21,077 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 06:13:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 06:13:21,123 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 06:13:21,123 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 06:13:21,123 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 06:13:21,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 06:13:21,144 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 06:13:21,325 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 06:13:21,330 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 06:13:21,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:13:21 BoogieIcfgContainer [2021-08-26 06:13:21,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 06:13:21,346 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 06:13:21,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 06:13:21,347 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 06:13:21,347 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:13:13" (3/4) ... [2021-08-26 06:13:21,348 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 06:13:21,381 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 06:13:21,382 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 06:13:21,383 INFO L168 Benchmark]: Toolchain (without parser) took 8824.07 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 35.6 MB in the beginning and 50.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 06:13:21,383 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 38.8 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 06:13:21,383 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.87 ms. Allocated memory is still 56.6 MB. Free memory was 35.4 MB in the beginning and 40.6 MB in the end (delta: -5.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 06:13:21,383 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.90 ms. Allocated memory is still 56.6 MB. Free memory was 40.6 MB in the beginning and 38.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 06:13:21,384 INFO L168 Benchmark]: Boogie Preprocessor took 32.56 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 37.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 06:13:21,384 INFO L168 Benchmark]: RCFGBuilder took 314.36 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 37.8 MB in the beginning and 56.9 MB in the end (delta: -19.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-08-26 06:13:21,384 INFO L168 Benchmark]: TraceAbstraction took 8229.70 ms. Allocated memory is still 75.5 MB. Free memory was 56.3 MB in the beginning and 53.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. [2021-08-26 06:13:21,385 INFO L168 Benchmark]: Witness Printer took 35.24 ms. Allocated memory is still 75.5 MB. Free memory was 53.6 MB in the beginning and 50.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 06:13:21,386 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 38.8 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 172.87 ms. Allocated memory is still 56.6 MB. Free memory was 35.4 MB in the beginning and 40.6 MB in the end (delta: -5.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.90 ms. Allocated memory is still 56.6 MB. Free memory was 40.6 MB in the beginning and 38.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.56 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 37.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 314.36 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 37.8 MB in the beginning and 56.9 MB in the end (delta: -19.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8229.70 ms. Allocated memory is still 75.5 MB. Free memory was 56.3 MB in the beginning and 53.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. * Witness Printer took 35.24 ms. Allocated memory is still 75.5 MB. Free memory was 53.6 MB in the beginning and 50.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 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] [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++<1 [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 FALSE !(counter++<1) [L12] COND TRUE !(cond) VAL [counter=2] [L14] reach_error() VAL [counter=2] - 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: 8175.5ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 18.6ms, AutomataDifference: 5969.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 66 SDtfs, 30 SDslu, 74 SDs, 0 SdLazy, 56 SolverSat, 15 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5851.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 41.2ms SsaConstructionTime, 160.3ms SatisfiabilityAnalysisTime, 437.3ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 204 SizeOfPredicates, 13 NumberOfNonLiveVariables, 279 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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 06:13:21,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...