./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 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/hard-u_unwindbound5.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 c13c90261946b46210ba5962a65c2a16d4a851c2 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/hard-u_unwindbound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c13c90261946b46210ba5962a65c2a16d4a851c2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2020-12-03 01:13:53,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:13:53,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:13:53,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:13:53,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:13:53,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:13:53,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:13:53,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:13:53,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:13:53,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:13:53,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:13:53,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:13:53,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:13:53,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:13:53,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:13:53,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:13:53,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:13:53,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:13:53,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:13:53,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:13:53,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:13:53,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:13:53,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:13:53,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:13:53,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:13:53,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:13:53,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:13:53,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:13:53,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:13:53,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:13:53,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:13:53,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:13:53,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:13:53,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:13:53,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:13:53,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:13:53,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:13:53,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:13:53,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:13:53,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:13:54,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:13:54,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-03 01:13:54,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:13:54,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:13:54,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:13:54,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:13:54,053 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:13:54,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:13:54,054 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:13:54,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 01:13:54,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:13:54,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:13:54,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:13:54,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:13:54,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:13:54,056 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:13:54,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:13:54,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:13:54,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:13:54,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:13:54,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:13:54,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:13:54,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:13:54,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:13:54,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:13:54,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:13:54,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-03 01:13:54,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 01:13:54,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:13:54,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:13:54,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c13c90261946b46210ba5962a65c2a16d4a851c2 [2020-12-03 01:13:54,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:13:54,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:13:54,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:13:54,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:13:54,573 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:13:54,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2020-12-03 01:13:54,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a62c363/efc655c533d54e8cacc67198b6b2e09f/FLAGb025f76f1 [2020-12-03 01:13:55,272 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:13:55,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2020-12-03 01:13:55,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a62c363/efc655c533d54e8cacc67198b6b2e09f/FLAGb025f76f1 [2020-12-03 01:13:55,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a62c363/efc655c533d54e8cacc67198b6b2e09f [2020-12-03 01:13:55,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:13:55,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:13:55,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:13:55,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:13:55,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:13:55,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:55,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f17d3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55, skipping insertion in model container [2020-12-03 01:13:55,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:55,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:13:55,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:13:55,914 WARN L226 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/hard-u_unwindbound5.c[537,550] [2020-12-03 01:13:55,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:13:55,949 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:13:55,964 WARN L226 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/hard-u_unwindbound5.c[537,550] [2020-12-03 01:13:55,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:13:55,994 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:13:55,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55 WrapperNode [2020-12-03 01:13:55,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:13:55,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:13:55,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:13:55,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:13:56,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:13:56,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:13:56,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:13:56,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:13:56,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... [2020-12-03 01:13:56,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:13:56,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:13:56,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:13:56,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:13:56,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:13:56,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 01:13:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:13:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:13:56,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:13:56,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:13:56,616 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-03 01:13:56,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:13:56 BoogieIcfgContainer [2020-12-03 01:13:56,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:13:56,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:13:56,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:13:56,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:13:56,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:13:55" (1/3) ... [2020-12-03 01:13:56,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a0bb02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:13:56, skipping insertion in model container [2020-12-03 01:13:56,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:13:55" (2/3) ... [2020-12-03 01:13:56,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a0bb02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:13:56, skipping insertion in model container [2020-12-03 01:13:56,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:13:56" (3/3) ... [2020-12-03 01:13:56,640 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2020-12-03 01:13:56,671 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:13:56,678 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-03 01:13:56,690 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-03 01:13:56,719 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:13:56,719 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:13:56,719 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:13:56,719 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:13:56,720 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:13:56,720 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:13:56,720 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:13:56,720 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:13:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-03 01:13:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:13:56,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:56,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:56,746 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-03 01:13:56,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:13:56,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321212199] [2020-12-03 01:13:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:13:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:56,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321212199] [2020-12-03 01:13:56,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:13:56,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 01:13:56,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481971781] [2020-12-03 01:13:56,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 01:13:56,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:13:56,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 01:13:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:13:56,957 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-03 01:13:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:56,980 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-03 01:13:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 01:13:56,982 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-03 01:13:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:56,994 INFO L225 Difference]: With dead ends: 79 [2020-12-03 01:13:56,994 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:13:56,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:13:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:13:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:13:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:13:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:13:57,049 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-03 01:13:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:57,049 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:13:57,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 01:13:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:13:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:13:57,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:57,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:57,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 01:13:57,051 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-03 01:13:57,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:13:57,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21839849] [2020-12-03 01:13:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:13:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:57,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21839849] [2020-12-03 01:13:57,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:13:57,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:13:57,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900194351] [2020-12-03 01:13:57,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:13:57,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:13:57,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:13:57,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:13:57,222 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:13:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:57,406 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-03 01:13:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:13:57,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-03 01:13:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:57,410 INFO L225 Difference]: With dead ends: 61 [2020-12-03 01:13:57,412 INFO L226 Difference]: Without dead ends: 59 [2020-12-03 01:13:57,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:13:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-03 01:13:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-12-03 01:13:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:13:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:13:57,441 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-03 01:13:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:57,442 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:13:57,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:13:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:13:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:13:57,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:57,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:57,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 01:13:57,445 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-03 01:13:57,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:13:57,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933240761] [2020-12-03 01:13:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:13:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933240761] [2020-12-03 01:13:57,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:13:57,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 01:13:57,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189891519] [2020-12-03 01:13:57,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:13:57,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:13:57,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:13:57,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:13:57,498 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:13:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:57,525 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-03 01:13:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:13:57,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:13:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:57,527 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:13:57,527 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:13:57,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:13:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:13:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:13:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:13:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:13:57,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-03 01:13:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:57,535 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:13:57,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:13:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:13:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:13:57,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:57,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:57,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 01:13:57,537 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:57,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-03 01:13:57,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:13:57,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84521361] [2020-12-03 01:13:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:13:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:57,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84521361] [2020-12-03 01:13:57,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:13:57,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:13:57,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071616338] [2020-12-03 01:13:57,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:13:57,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:13:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:13:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:13:57,635 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:13:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:57,802 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:13:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:13:57,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:13:57,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:57,804 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:13:57,805 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:13:57,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:13:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:13:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:13:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:13:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:13:57,814 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-03 01:13:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:57,815 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:13:57,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:13:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:13:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 01:13:57,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:57,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:57,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 01:13:57,817 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:57,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:57,818 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-03 01:13:57,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:13:57,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106921987] [2020-12-03 01:13:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:13:57,837 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:13:57,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7418910] [2020-12-03 01:13:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:13:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-03 01:13:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:13:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:58,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106921987] [2020-12-03 01:13:58,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:13:58,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7418910] [2020-12-03 01:13:58,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:13:58,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-03 01:13:58,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610481987] [2020-12-03 01:13:58,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:13:58,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:13:58,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:13:58,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:13:58,199 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-12-03 01:13:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:58,585 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-03 01:13:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 01:13:58,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-03 01:13:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:58,587 INFO L225 Difference]: With dead ends: 81 [2020-12-03 01:13:58,587 INFO L226 Difference]: Without dead ends: 58 [2020-12-03 01:13:58,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-03 01:13:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-03 01:13:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-03 01:13:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 01:13:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-03 01:13:58,599 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-03 01:13:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:58,599 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-03 01:13:58,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:13:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-03 01:13:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 01:13:58,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:58,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:58,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:13:58,816 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:58,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-03 01:13:58,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:13:58,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146554481] [2020-12-03 01:13:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:13:58,847 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:13:58,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890378078] [2020-12-03 01:13:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:13:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:58,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-03 01:13:58,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:13:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:59,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146554481] [2020-12-03 01:13:59,137 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:13:59,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890378078] [2020-12-03 01:13:59,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:13:59,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 01:13:59,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734238900] [2020-12-03 01:13:59,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:13:59,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:13:59,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:13:59,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:13:59,140 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 7 states. [2020-12-03 01:13:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:59,603 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-03 01:13:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:13:59,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-03 01:13:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:59,606 INFO L225 Difference]: With dead ends: 53 [2020-12-03 01:13:59,607 INFO L226 Difference]: Without dead ends: 41 [2020-12-03 01:13:59,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:13:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-03 01:13:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-03 01:13:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-03 01:13:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-03 01:13:59,636 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 16 [2020-12-03 01:13:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:59,638 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-03 01:13:59,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:13:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-03 01:13:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 01:13:59,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:59,640 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:59,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:13:59,855 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1571159167, now seen corresponding path program 1 times [2020-12-03 01:13:59,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:13:59,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920519004] [2020-12-03 01:13:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:13:59,871 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:13:59,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042120797] [2020-12-03 01:13:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:13:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:13:59,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:13:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:59,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920519004] [2020-12-03 01:13:59,982 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:13:59,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042120797] [2020-12-03 01:13:59,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:13:59,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-03 01:13:59,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806442346] [2020-12-03 01:13:59,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 01:13:59,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:13:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 01:13:59,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:13:59,992 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-12-03 01:14:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:14:00,031 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-03 01:14:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 01:14:00,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-03 01:14:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:14:00,033 INFO L225 Difference]: With dead ends: 62 [2020-12-03 01:14:00,033 INFO L226 Difference]: Without dead ends: 43 [2020-12-03 01:14:00,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:14:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-03 01:14:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-03 01:14:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-03 01:14:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-03 01:14:00,040 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 18 [2020-12-03 01:14:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:14:00,040 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-03 01:14:00,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 01:14:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-03 01:14:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:14:00,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:14:00,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:14:00,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:00,256 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:14:00,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:14:00,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-03 01:14:00,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:14:00,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725569888] [2020-12-03 01:14:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:14:00,272 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:14:00,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446737434] [2020-12-03 01:14:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:14:00,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-03 01:14:00,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:14:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:14:00,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725569888] [2020-12-03 01:14:00,620 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:14:00,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446737434] [2020-12-03 01:14:00,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:14:00,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-03 01:14:00,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571881245] [2020-12-03 01:14:00,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:14:00,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:14:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:14:00,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:14:00,622 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 8 states. [2020-12-03 01:14:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:14:01,121 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-12-03 01:14:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 01:14:01,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:14:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:14:01,123 INFO L225 Difference]: With dead ends: 83 [2020-12-03 01:14:01,123 INFO L226 Difference]: Without dead ends: 71 [2020-12-03 01:14:01,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-03 01:14:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-03 01:14:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-12-03 01:14:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-03 01:14:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-12-03 01:14:01,131 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-12-03 01:14:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:14:01,132 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-12-03 01:14:01,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:14:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-12-03 01:14:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-03 01:14:01,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:14:01,133 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:14:01,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:01,334 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:14:01,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:14:01,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1958905870, now seen corresponding path program 1 times [2020-12-03 01:14:01,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:14:01,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103348146] [2020-12-03 01:14:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:14:01,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:14:01,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756182123] [2020-12-03 01:14:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:14:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-03 01:14:01,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:14:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:14:01,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103348146] [2020-12-03 01:14:01,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:14:01,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756182123] [2020-12-03 01:14:01,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:14:01,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-03 01:14:01,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386380469] [2020-12-03 01:14:01,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:14:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:14:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:14:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:14:01,588 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 7 states. [2020-12-03 01:14:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:14:01,914 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-12-03 01:14:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:14:01,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-03 01:14:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:14:01,920 INFO L225 Difference]: With dead ends: 74 [2020-12-03 01:14:01,921 INFO L226 Difference]: Without dead ends: 70 [2020-12-03 01:14:01,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:14:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-03 01:14:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-03 01:14:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-03 01:14:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-12-03 01:14:01,942 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 24 [2020-12-03 01:14:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:14:01,942 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-12-03 01:14:01,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:14:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-12-03 01:14:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 01:14:01,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:14:01,950 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:14:02,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:02,151 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:14:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:14:02,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2020-12-03 01:14:02,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:14:02,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715578845] [2020-12-03 01:14:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:14:02,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:14:02,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519234178] [2020-12-03 01:14:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:14:02,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:14:02,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:14:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:14:02,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715578845] [2020-12-03 01:14:02,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:14:02,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519234178] [2020-12-03 01:14:02,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:14:02,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-03 01:14:02,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798331775] [2020-12-03 01:14:02,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:14:02,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:14:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:14:02,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:14:02,304 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 6 states. [2020-12-03 01:14:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:14:02,327 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-12-03 01:14:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 01:14:02,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-03 01:14:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:14:02,329 INFO L225 Difference]: With dead ends: 71 [2020-12-03 01:14:02,329 INFO L226 Difference]: Without dead ends: 65 [2020-12-03 01:14:02,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:14:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-03 01:14:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-03 01:14:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-03 01:14:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-12-03 01:14:02,338 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 27 [2020-12-03 01:14:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:14:02,338 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-12-03 01:14:02,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:14:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-12-03 01:14:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 01:14:02,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:14:02,339 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:14:02,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:02,554 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:14:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:14:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1875627766, now seen corresponding path program 1 times [2020-12-03 01:14:02,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:14:02,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257446590] [2020-12-03 01:14:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:14:02,573 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:14:02,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664910625] [2020-12-03 01:14:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:14:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:14:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:14:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:14:02,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257446590] [2020-12-03 01:14:02,704 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:14:02,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664910625] [2020-12-03 01:14:02,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:14:02,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-03 01:14:02,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099125739] [2020-12-03 01:14:02,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:14:02,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:14:02,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:14:02,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:14:02,706 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 6 states. [2020-12-03 01:14:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:14:02,753 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-12-03 01:14:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:14:02,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-03 01:14:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:14:02,757 INFO L225 Difference]: With dead ends: 94 [2020-12-03 01:14:02,757 INFO L226 Difference]: Without dead ends: 66 [2020-12-03 01:14:02,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:14:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-03 01:14:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-03 01:14:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-03 01:14:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-12-03 01:14:02,775 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 28 [2020-12-03 01:14:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:14:02,775 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-12-03 01:14:02,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:14:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-12-03 01:14:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 01:14:02,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:14:02,779 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 01:14:02,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:02,994 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:14:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:14:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1711245194, now seen corresponding path program 2 times [2020-12-03 01:14:02,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:14:02,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341950260] [2020-12-03 01:14:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:14:03,010 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:14:03,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355815750] [2020-12-03 01:14:03,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:03,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-03 01:14:03,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 01:14:03,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-03 01:14:03,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:14:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:14:03,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341950260] [2020-12-03 01:14:03,682 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:14:03,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355815750] [2020-12-03 01:14:03,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:14:03,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-03 01:14:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523654491] [2020-12-03 01:14:03,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-03 01:14:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:14:03,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-03 01:14:03,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-03 01:14:03,684 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 11 states. [2020-12-03 01:14:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:14:04,613 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-12-03 01:14:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 01:14:04,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-12-03 01:14:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:14:04,614 INFO L225 Difference]: With dead ends: 103 [2020-12-03 01:14:04,614 INFO L226 Difference]: Without dead ends: 93 [2020-12-03 01:14:04,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-03 01:14:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-03 01:14:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-12-03 01:14:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-03 01:14:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-12-03 01:14:04,626 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 28 [2020-12-03 01:14:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:14:04,629 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-12-03 01:14:04,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-03 01:14:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-12-03 01:14:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-03 01:14:04,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:14:04,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:14:04,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-03 01:14:04,842 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:14:04,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:14:04,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1339843922, now seen corresponding path program 1 times [2020-12-03 01:14:04,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:14:04,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339209421] [2020-12-03 01:14:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:14:04,859 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:14:04,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294567791] [2020-12-03 01:14:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:14:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:14:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-03 01:14:09,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:14:09,707 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:09,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-03 01:14:09,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-03 01:14:09,937 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 01:14:10,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-03 01:14:10,783 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:12,561 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:14,402 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:16,260 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:18,209 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:19,361 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:20,242 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:21,166 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:22,897 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:24,202 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:25,165 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:26,222 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:27,089 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:30,528 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:34,871 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:39,722 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:46,735 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:14:58,942 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:15:17,865 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:15:20,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339209421] [2020-12-03 01:15:20,780 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:15:20,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294567791] [2020-12-03 01:15:20,780 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-03 01:15:20,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:15:20,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-03 01:15:20,781 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-03 01:15:20,781 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:15:20,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:15:21,011 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-03 01:15:21,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:15:21 BoogieIcfgContainer [2020-12-03 01:15:21,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:15:21,013 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:15:21,013 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:15:21,013 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:15:21,014 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:13:56" (3/4) ... [2020-12-03 01:15:21,017 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 01:15:21,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:15:21,020 INFO L168 Benchmark]: Toolchain (without parser) took 85352.20 ms. Allocated memory was 46.1 MB in the beginning and 211.8 MB in the end (delta: 165.7 MB). Free memory was 24.4 MB in the beginning and 143.3 MB in the end (delta: -118.9 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. [2020-12-03 01:15:21,020 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 46.1 MB. Free memory was 27.1 MB in the beginning and 27.0 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:15:21,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.03 ms. Allocated memory is still 46.1 MB. Free memory was 24.2 MB in the beginning and 25.4 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-12-03 01:15:21,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.86 ms. Allocated memory is still 46.1 MB. Free memory was 25.4 MB in the beginning and 23.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:15:21,022 INFO L168 Benchmark]: Boogie Preprocessor took 28.17 ms. Allocated memory is still 46.1 MB. Free memory was 23.7 MB in the beginning and 22.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:15:21,023 INFO L168 Benchmark]: RCFGBuilder took 549.60 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.5 MB in the beginning and 27.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:15:21,023 INFO L168 Benchmark]: TraceAbstraction took 84391.44 ms. Allocated memory was 56.6 MB in the beginning and 211.8 MB in the end (delta: 155.2 MB). Free memory was 26.7 MB in the beginning and 144.3 MB in the end (delta: -117.6 MB). Peak memory consumption was 115.2 MB. Max. memory is 16.1 GB. [2020-12-03 01:15:21,024 INFO L168 Benchmark]: Witness Printer took 4.90 ms. Allocated memory is still 211.8 MB. Free memory was 144.3 MB in the beginning and 143.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:15:21,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 46.1 MB. Free memory was 27.1 MB in the beginning and 27.0 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.03 ms. Allocated memory is still 46.1 MB. Free memory was 24.2 MB in the beginning and 25.4 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.86 ms. Allocated memory is still 46.1 MB. Free memory was 25.4 MB in the beginning and 23.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.17 ms. Allocated memory is still 46.1 MB. Free memory was 23.7 MB in the beginning and 22.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 549.60 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.5 MB in the beginning and 27.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 84391.44 ms. Allocated memory was 56.6 MB in the beginning and 211.8 MB in the end (delta: 155.2 MB). Free memory was 26.7 MB in the beginning and 144.3 MB in the end (delta: -117.6 MB). Peak memory consumption was 115.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.90 ms. Allocated memory is still 211.8 MB. Free memory was 144.3 MB in the beginning and 143.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND TRUE !(r >= d) [L45] EXPR counter++ [L45] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p [L45] EXPR counter++ [L45] COND TRUE counter++<5 [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 84.2s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 394 SDtfs, 783 SDslu, 796 SDs, 0 SdLazy, 633 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 94 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 197 ConstructedInterpolants, 0 QuantifiedInterpolants, 30603 SizeOfPredicates, 44 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 0/59 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-03 01:15:23,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:15:23,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:15:23,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:15:23,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:15:23,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:15:23,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:15:23,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:15:23,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:15:23,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:15:23,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:15:23,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:15:23,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:15:23,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:15:23,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:15:23,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:15:23,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:15:23,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:15:23,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:15:23,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:15:23,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:15:23,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:15:23,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:15:23,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:15:23,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:15:23,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:15:23,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:15:23,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:15:23,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:15:23,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:15:23,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:15:23,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:15:23,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:15:23,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:15:23,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:15:23,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:15:23,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:15:23,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:15:23,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:15:23,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:15:23,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:15:23,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-03 01:15:23,843 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:15:23,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:15:23,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:15:23,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:15:23,846 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:15:23,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:15:23,847 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:15:23,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:15:23,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:15:23,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:15:23,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:15:23,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:15:23,848 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 01:15:23,848 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 01:15:23,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:15:23,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:15:23,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:15:23,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:15:23,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:15:23,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:15:23,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:15:23,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:15:23,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:15:23,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:15:23,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:15:23,852 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-03 01:15:23,852 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 01:15:23,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:15:23,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:15:23,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 01:15:23,853 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c13c90261946b46210ba5962a65c2a16d4a851c2 [2020-12-03 01:15:24,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:15:24,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:15:24,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:15:24,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:15:24,404 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:15:24,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2020-12-03 01:15:24,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afaede3c1/086d0e2b7b1747a797655da55be124d8/FLAGf4df56e39 [2020-12-03 01:15:25,093 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:15:25,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2020-12-03 01:15:25,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afaede3c1/086d0e2b7b1747a797655da55be124d8/FLAGf4df56e39 [2020-12-03 01:15:25,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afaede3c1/086d0e2b7b1747a797655da55be124d8 [2020-12-03 01:15:25,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:15:25,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:15:25,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:15:25,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:15:25,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:15:25,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d080a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25, skipping insertion in model container [2020-12-03 01:15:25,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:15:25,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:15:25,648 WARN L226 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/hard-u_unwindbound5.c[537,550] [2020-12-03 01:15:25,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:15:25,687 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:15:25,702 WARN L226 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/hard-u_unwindbound5.c[537,550] [2020-12-03 01:15:25,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:15:25,729 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:15:25,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25 WrapperNode [2020-12-03 01:15:25,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:15:25,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:15:25,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:15:25,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:15:25,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:15:25,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:15:25,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:15:25,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:15:25,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... [2020-12-03 01:15:25,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:15:25,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:15:25,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:15:25,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:15:25,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:15:25,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 01:15:25,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:15:25,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:15:25,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:15:26,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:15:26,365 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-03 01:15:26,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:15:26 BoogieIcfgContainer [2020-12-03 01:15:26,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:15:26,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:15:26,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:15:26,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:15:26,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:15:25" (1/3) ... [2020-12-03 01:15:26,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bdaef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:15:26, skipping insertion in model container [2020-12-03 01:15:26,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:15:25" (2/3) ... [2020-12-03 01:15:26,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bdaef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:15:26, skipping insertion in model container [2020-12-03 01:15:26,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:15:26" (3/3) ... [2020-12-03 01:15:26,380 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2020-12-03 01:15:26,398 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:15:26,402 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-03 01:15:26,416 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-03 01:15:26,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:15:26,454 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:15:26,454 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:15:26,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:15:26,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:15:26,455 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:15:26,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:15:26,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:15:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-03 01:15:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:15:26,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:26,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:26,482 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-03 01:15:26,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:26,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304323636] [2020-12-03 01:15:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:26,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-03 01:15:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:26,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:15:26,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304323636] [2020-12-03 01:15:26,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:15:26,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 01:15:26,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217706078] [2020-12-03 01:15:26,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 01:15:26,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:26,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 01:15:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:15:26,678 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-03 01:15:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:26,701 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-03 01:15:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 01:15:26,703 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-03 01:15:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:26,715 INFO L225 Difference]: With dead ends: 79 [2020-12-03 01:15:26,715 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:15:26,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:15:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:15:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:15:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:15:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:15:26,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-03 01:15:26,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:26,765 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:15:26,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 01:15:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:15:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:15:26,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:26,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:26,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 01:15:26,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-03 01:15:26,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:26,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250398850] [2020-12-03 01:15:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 01:15:27,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:27,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:15:27,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250398850] [2020-12-03 01:15:27,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:15:27,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:15:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448359850] [2020-12-03 01:15:27,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:15:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:27,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:15:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:15:27,127 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:15:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:27,326 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:15:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:15:27,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-03 01:15:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:27,331 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:15:27,331 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:15:27,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:15:27,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:15:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:15:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:15:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:15:27,341 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-03 01:15:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:27,342 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:15:27,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:15:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:15:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:15:27,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:27,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:27,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 01:15:27,557 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-03 01:15:27,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:27,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531027723] [2020-12-03 01:15:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 01:15:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:27,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:15:27,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531027723] [2020-12-03 01:15:27,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:15:27,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 01:15:27,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153596250] [2020-12-03 01:15:27,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:15:27,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:27,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:15:27,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:15:27,650 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:15:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:27,675 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-03 01:15:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:15:27,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:15:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:27,677 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:15:27,677 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:15:27,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:15:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:15:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:15:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:15:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:15:27,689 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-03 01:15:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:27,689 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:15:27,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:15:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:15:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:15:27,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:27,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:27,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 01:15:27,907 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-03 01:15:27,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:27,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738852389] [2020-12-03 01:15:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:27,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 01:15:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:28,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:15:28,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738852389] [2020-12-03 01:15:28,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:15:28,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:15:28,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78982629] [2020-12-03 01:15:28,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:15:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:28,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:15:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:15:28,008 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:15:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:28,190 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:15:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:15:28,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:15:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:28,191 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:15:28,191 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:15:28,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:15:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:15:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:15:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:15:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:15:28,199 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-03 01:15:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:28,199 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:15:28,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:15:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:15:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 01:15:28,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:28,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:28,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-03 01:15:28,418 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-03 01:15:28,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:28,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335917947] [2020-12-03 01:15:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:28,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:15:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:28,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:15:28,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335917947] [2020-12-03 01:15:28,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:15:28,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:15:28,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586939507] [2020-12-03 01:15:28,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:15:28,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:15:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:15:28,565 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:15:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:28,851 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-03 01:15:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:15:28,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-03 01:15:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:28,852 INFO L225 Difference]: With dead ends: 81 [2020-12-03 01:15:28,852 INFO L226 Difference]: Without dead ends: 58 [2020-12-03 01:15:28,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:15:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-03 01:15:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-03 01:15:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 01:15:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-03 01:15:28,862 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-03 01:15:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:28,863 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-03 01:15:28,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:15:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-03 01:15:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 01:15:28,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:28,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:29,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-03 01:15:29,078 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:29,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-03 01:15:29,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:29,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608940812] [2020-12-03 01:15:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:29,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:15:29,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:29,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:15:29,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608940812] [2020-12-03 01:15:29,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:15:29,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:15:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651168957] [2020-12-03 01:15:29,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:15:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:15:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:15:29,207 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 4 states. [2020-12-03 01:15:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:29,407 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-12-03 01:15:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:15:29,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-03 01:15:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:29,409 INFO L225 Difference]: With dead ends: 68 [2020-12-03 01:15:29,409 INFO L226 Difference]: Without dead ends: 56 [2020-12-03 01:15:29,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:15:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-03 01:15:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-12-03 01:15:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-03 01:15:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-03 01:15:29,418 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2020-12-03 01:15:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:29,419 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-03 01:15:29,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:15:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-03 01:15:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:15:29,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:29,420 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:29,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-03 01:15:29,638 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1944686052, now seen corresponding path program 1 times [2020-12-03 01:15:29,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:29,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295452842] [2020-12-03 01:15:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:15:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:29,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:15:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:29,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295452842] [2020-12-03 01:15:29,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:15:29,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-03 01:15:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798027528] [2020-12-03 01:15:29,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:15:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:15:29,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:15:29,851 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 8 states. [2020-12-03 01:15:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:29,997 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2020-12-03 01:15:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 01:15:29,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:15:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:30,002 INFO L225 Difference]: With dead ends: 117 [2020-12-03 01:15:30,003 INFO L226 Difference]: Without dead ends: 89 [2020-12-03 01:15:30,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:15:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-03 01:15:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2020-12-03 01:15:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-03 01:15:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-12-03 01:15:30,031 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 20 [2020-12-03 01:15:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:30,032 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-12-03 01:15:30,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:15:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-12-03 01:15:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:15:30,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:30,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:30,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-03 01:15:30,242 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:30,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-03 01:15:30,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:30,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568586520] [2020-12-03 01:15:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:15:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:30,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:15:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:30,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568586520] [2020-12-03 01:15:30,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:15:30,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-03 01:15:30,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499826797] [2020-12-03 01:15:30,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:15:30,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:30,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:15:30,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:15:30,665 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 8 states. [2020-12-03 01:15:34,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:34,065 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2020-12-03 01:15:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-03 01:15:34,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:15:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:34,067 INFO L225 Difference]: With dead ends: 140 [2020-12-03 01:15:34,067 INFO L226 Difference]: Without dead ends: 126 [2020-12-03 01:15:34,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-03 01:15:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-03 01:15:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-12-03 01:15:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-03 01:15:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-12-03 01:15:34,090 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 20 [2020-12-03 01:15:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:34,091 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-12-03 01:15:34,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:15:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-12-03 01:15:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 01:15:34,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:34,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:34,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-03 01:15:34,305 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:34,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2020-12-03 01:15:34,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:34,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039151204] [2020-12-03 01:15:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:15:34,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:34,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:15:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:34,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039151204] [2020-12-03 01:15:34,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:15:34,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-03 01:15:34,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043592429] [2020-12-03 01:15:34,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 01:15:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:34,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 01:15:34,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-03 01:15:34,583 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 10 states. [2020-12-03 01:15:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:15:34,856 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2020-12-03 01:15:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 01:15:34,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-03 01:15:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:15:34,859 INFO L225 Difference]: With dead ends: 136 [2020-12-03 01:15:34,859 INFO L226 Difference]: Without dead ends: 126 [2020-12-03 01:15:34,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-03 01:15:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-03 01:15:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2020-12-03 01:15:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-03 01:15:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2020-12-03 01:15:34,906 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 27 [2020-12-03 01:15:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:15:34,906 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2020-12-03 01:15:34,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 01:15:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2020-12-03 01:15:34,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-03 01:15:34,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:15:34,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:15:35,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-03 01:15:35,126 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:15:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:15:35,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1339843922, now seen corresponding path program 1 times [2020-12-03 01:15:35,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:15:35,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572374016] [2020-12-03 01:15:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-03 01:15:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:15:35,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 01:15:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:15:35,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:15:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:35,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:15:36,586 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-03 01:15:37,009 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:15:37,489 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 01:15:38,458 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-12-03 01:15:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:15:38,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572374016] [2020-12-03 01:15:38,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:15:38,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-03 01:15:38,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214472775] [2020-12-03 01:15:38,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 01:15:38,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:15:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 01:15:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-03 01:15:38,514 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 14 states. [2020-12-03 01:15:40,128 WARN L197 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:15:41,450 WARN L197 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 01:15:42,801 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:15:45,996 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 01:15:47,701 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:15:48,396 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 01:15:49,493 WARN L197 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:15:50,194 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-03 01:15:53,552 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:15:54,102 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:15:56,329 WARN L197 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 01:15:57,246 WARN L197 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-03 01:16:00,451 WARN L197 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 01:16:06,473 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:16:11,742 WARN L197 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 01:16:18,239 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-03 01:16:20,114 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:16:21,103 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-03 01:16:23,029 WARN L197 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 01:16:23,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:16:23,680 INFO L93 Difference]: Finished difference Result 229 states and 267 transitions. [2020-12-03 01:16:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-03 01:16:23,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-12-03 01:16:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:16:23,687 INFO L225 Difference]: With dead ends: 229 [2020-12-03 01:16:23,687 INFO L226 Difference]: Without dead ends: 190 [2020-12-03 01:16:23,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-12-03 01:16:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-03 01:16:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 119. [2020-12-03 01:16:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-03 01:16:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2020-12-03 01:16:23,709 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 31 [2020-12-03 01:16:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:16:23,709 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2020-12-03 01:16:23,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 01:16:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2020-12-03 01:16:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-03 01:16:23,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:16:23,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:16:23,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-03 01:16:23,929 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:16:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:16:23,930 INFO L82 PathProgramCache]: Analyzing trace with hash -900022411, now seen corresponding path program 1 times [2020-12-03 01:16:23,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:16:23,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127110525] [2020-12-03 01:16:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-03 01:16:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:16:24,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 01:16:24,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:16:24,193 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:16:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:16:24,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:16:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:16:25,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127110525] [2020-12-03 01:16:25,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:16:25,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-03 01:16:25,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844779829] [2020-12-03 01:16:25,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 01:16:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:16:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 01:16:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:16:25,188 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand 12 states. [2020-12-03 01:16:25,831 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-03 01:16:26,210 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-03 01:16:26,524 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 01:16:27,241 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:16:29,500 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:16:30,050 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:16:30,443 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-03 01:16:30,687 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-03 01:16:31,499 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:16:32,154 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:16:32,453 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:16:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:16:33,308 INFO L93 Difference]: Finished difference Result 193 states and 230 transitions. [2020-12-03 01:16:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-03 01:16:33,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-12-03 01:16:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:16:33,311 INFO L225 Difference]: With dead ends: 193 [2020-12-03 01:16:33,311 INFO L226 Difference]: Without dead ends: 156 [2020-12-03 01:16:33,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2020-12-03 01:16:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-03 01:16:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2020-12-03 01:16:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-03 01:16:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2020-12-03 01:16:33,332 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 33 [2020-12-03 01:16:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:16:33,333 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2020-12-03 01:16:33,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 01:16:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2020-12-03 01:16:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-03 01:16:33,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:16:33,334 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:16:33,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-03 01:16:33,550 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:16:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:16:33,550 INFO L82 PathProgramCache]: Analyzing trace with hash 918142130, now seen corresponding path program 1 times [2020-12-03 01:16:33,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:16:33,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012669530] [2020-12-03 01:16:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-03 01:16:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:16:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 01:16:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:16:34,207 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:16:34,468 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:16:35,037 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:16:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:16:35,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:16:36,374 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:16:36,374 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:16:37,593 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 01:16:37,609 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:16:37,609 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:16:45,265 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:16:45,273 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:16:45,274 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:16:48,396 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:16:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:16:48,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012669530] [2020-12-03 01:16:48,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:16:48,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2020-12-03 01:16:48,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545592914] [2020-12-03 01:16:48,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-03 01:16:48,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:16:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-03 01:16:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=304, Unknown=3, NotChecked=0, Total=380 [2020-12-03 01:16:48,459 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand 20 states. [2020-12-03 01:16:51,202 WARN L197 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2020-12-03 01:16:53,575 WARN L197 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-12-03 01:17:06,862 WARN L197 SmtUtils]: Spent 12.99 s on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-12-03 01:17:10,848 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-12-03 01:17:13,529 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:17:14,589 WARN L197 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-12-03 01:17:18,360 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:17:20,003 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:17:24,468 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:17:28,690 WARN L197 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-03 01:17:29,907 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:17:34,160 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:17:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:17:34,162 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2020-12-03 01:17:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-03 01:17:34,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-12-03 01:17:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:17:34,164 INFO L225 Difference]: With dead ends: 138 [2020-12-03 01:17:34,164 INFO L226 Difference]: Without dead ends: 121 [2020-12-03 01:17:34,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=302, Invalid=1026, Unknown=4, NotChecked=0, Total=1332 [2020-12-03 01:17:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-03 01:17:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2020-12-03 01:17:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-03 01:17:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2020-12-03 01:17:34,185 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 36 [2020-12-03 01:17:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:17:34,185 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2020-12-03 01:17:34,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-03 01:17:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2020-12-03 01:17:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-03 01:17:34,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:17:34,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:17:34,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-03 01:17:34,407 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:17:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:17:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash -68445756, now seen corresponding path program 2 times [2020-12-03 01:17:34,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:17:34,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023881210] [2020-12-03 01:17:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-03 01:17:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:17:34,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:17:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:17:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:17:34,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:17:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:17:34,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023881210] [2020-12-03 01:17:34,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:17:34,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-03 01:17:34,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758764546] [2020-12-03 01:17:34,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:17:34,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:17:34,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:17:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:17:34,713 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand 8 states. [2020-12-03 01:17:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:17:35,003 INFO L93 Difference]: Finished difference Result 227 states and 271 transitions. [2020-12-03 01:17:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 01:17:35,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-03 01:17:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:17:35,005 INFO L225 Difference]: With dead ends: 227 [2020-12-03 01:17:35,005 INFO L226 Difference]: Without dead ends: 190 [2020-12-03 01:17:35,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-03 01:17:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-03 01:17:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 152. [2020-12-03 01:17:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-03 01:17:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 185 transitions. [2020-12-03 01:17:35,027 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 185 transitions. Word has length 44 [2020-12-03 01:17:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:17:35,027 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 185 transitions. [2020-12-03 01:17:35,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:17:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 185 transitions. [2020-12-03 01:17:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-03 01:17:35,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:17:35,030 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:17:35,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-03 01:17:35,237 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:17:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:17:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2116618682, now seen corresponding path program 1 times [2020-12-03 01:17:35,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:17:35,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113015252] [2020-12-03 01:17:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-03 01:17:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:17:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 01:17:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:17:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:17:35,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:17:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:17:35,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113015252] [2020-12-03 01:17:35,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:17:35,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-03 01:17:35,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613533787] [2020-12-03 01:17:35,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 01:17:35,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:17:35,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 01:17:35,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-12-03 01:17:35,746 INFO L87 Difference]: Start difference. First operand 152 states and 185 transitions. Second operand 14 states. [2020-12-03 01:17:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:17:36,041 INFO L93 Difference]: Finished difference Result 201 states and 248 transitions. [2020-12-03 01:17:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 01:17:36,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-12-03 01:17:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:17:36,044 INFO L225 Difference]: With dead ends: 201 [2020-12-03 01:17:36,044 INFO L226 Difference]: Without dead ends: 154 [2020-12-03 01:17:36,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-12-03 01:17:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-03 01:17:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-12-03 01:17:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-03 01:17:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 187 transitions. [2020-12-03 01:17:36,065 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 187 transitions. Word has length 45 [2020-12-03 01:17:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:17:36,065 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 187 transitions. [2020-12-03 01:17:36,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 01:17:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 187 transitions. [2020-12-03 01:17:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-03 01:17:36,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:17:36,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:17:36,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-03 01:17:36,280 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:17:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:17:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1302416352, now seen corresponding path program 2 times [2020-12-03 01:17:36,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:17:36,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610456147] [2020-12-03 01:17:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-03 01:17:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:17:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-03 01:17:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:17:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:17:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:17:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:17:36,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610456147] [2020-12-03 01:17:36,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:17:36,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-03 01:17:36,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787776640] [2020-12-03 01:17:36,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-03 01:17:36,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:17:36,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-03 01:17:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-03 01:17:36,965 INFO L87 Difference]: Start difference. First operand 154 states and 187 transitions. Second operand 16 states. [2020-12-03 01:17:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:17:38,274 INFO L93 Difference]: Finished difference Result 308 states and 367 transitions. [2020-12-03 01:17:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-03 01:17:38,276 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-12-03 01:17:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:17:38,277 INFO L225 Difference]: With dead ends: 308 [2020-12-03 01:17:38,278 INFO L226 Difference]: Without dead ends: 240 [2020-12-03 01:17:38,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-12-03 01:17:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-03 01:17:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 172. [2020-12-03 01:17:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-03 01:17:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2020-12-03 01:17:38,306 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 46 [2020-12-03 01:17:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:17:38,306 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2020-12-03 01:17:38,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-03 01:17:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2020-12-03 01:17:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-03 01:17:38,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:17:38,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:17:38,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-03 01:17:38,526 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:17:38,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:17:38,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1720227954, now seen corresponding path program 1 times [2020-12-03 01:17:38,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:17:38,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746995523] [2020-12-03 01:17:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-03 01:17:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:17:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-03 01:17:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:17:41,199 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-03 01:17:41,527 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-12-03 01:17:41,535 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 01:17:42,459 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-12-03 01:17:47,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-03 01:17:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:17:47,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:17:51,635 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-03 01:17:52,413 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-03 01:17:53,318 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:17:53,322 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:17:53,322 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:17:54,611 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:17:55,817 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-03 01:17:55,822 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:17:55,822 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:17:57,507 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:18:02,168 WARN L197 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 01:18:04,643 WARN L197 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-03 01:18:07,351 WARN L197 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-03 01:18:12,567 WARN L197 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:18:16,317 WARN L197 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:18:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:18:16,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746995523] [2020-12-03 01:18:16,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:18:16,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-03 01:18:16,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453982872] [2020-12-03 01:18:16,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-03 01:18:16,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:18:16,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-03 01:18:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=601, Unknown=5, NotChecked=0, Total=756 [2020-12-03 01:18:16,428 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand 28 states. [2020-12-03 01:18:47,312 WARN L197 SmtUtils]: Spent 6.94 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-03 01:18:50,699 WARN L197 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2020-12-03 01:18:57,289 WARN L197 SmtUtils]: Spent 3.04 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-03 01:19:11,678 WARN L197 SmtUtils]: Spent 4.23 s on a formula simplification that was a NOOP. DAG size: 83 [2020-12-03 01:19:56,077 WARN L197 SmtUtils]: Spent 32.52 s on a formula simplification. DAG size of input: 96 DAG size of output: 34 [2020-12-03 01:20:19,074 WARN L197 SmtUtils]: Spent 22.22 s on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-12-03 01:20:40,065 WARN L197 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 103 [2020-12-03 01:20:44,842 WARN L197 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 45 [2020-12-03 01:21:12,231 WARN L197 SmtUtils]: Spent 5.02 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-03 01:21:46,304 WARN L197 SmtUtils]: Spent 21.76 s on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2020-12-03 01:21:50,343 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 01:22:05,439 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-03 01:22:29,798 WARN L197 SmtUtils]: Spent 21.89 s on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2020-12-03 01:22:32,780 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-03 01:22:41,810 WARN L197 SmtUtils]: Spent 3.23 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-03 01:22:52,967 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:22:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:22:57,123 INFO L93 Difference]: Finished difference Result 243 states and 277 transitions. [2020-12-03 01:22:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-03 01:22:57,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 47 [2020-12-03 01:22:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:22:57,137 INFO L225 Difference]: With dead ends: 243 [2020-12-03 01:22:57,137 INFO L226 Difference]: Without dead ends: 241 [2020-12-03 01:22:57,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 237.3s TimeCoverageRelationStatistics Valid=514, Invalid=2551, Unknown=15, NotChecked=0, Total=3080 [2020-12-03 01:22:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-03 01:22:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 172. [2020-12-03 01:22:57,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-03 01:22:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2020-12-03 01:22:57,162 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 47 [2020-12-03 01:22:57,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:22:57,163 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2020-12-03 01:22:57,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-03 01:22:57,163 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2020-12-03 01:22:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-03 01:22:57,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:22:57,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:22:57,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-03 01:22:57,366 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:22:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:22:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash -563603776, now seen corresponding path program 2 times [2020-12-03 01:22:57,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:22:57,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326554688] [2020-12-03 01:22:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-03 01:22:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:22:57,533 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:22:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:22:57,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:22:57,782 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-03 01:22:57,782 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:22:57,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-12-03 01:22:58,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:22:58 BoogieIcfgContainer [2020-12-03 01:22:58,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:22:58,087 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:22:58,088 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:22:58,088 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:22:58,089 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:15:26" (3/4) ... [2020-12-03 01:22:58,091 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 01:22:58,159 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-03 01:22:58,159 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:22:58,161 INFO L168 Benchmark]: Toolchain (without parser) took 452725.07 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 22.1 MB in the beginning and 47.2 MB in the end (delta: -25.1 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. [2020-12-03 01:22:58,161 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 44.0 MB. Free memory was 24.8 MB in the beginning and 24.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:22:58,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.81 ms. Allocated memory is still 44.0 MB. Free memory was 21.9 MB in the beginning and 20.9 MB in the end (delta: 994.2 kB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-12-03 01:22:58,162 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.89 ms. Allocated memory is still 44.0 MB. Free memory was 20.9 MB in the beginning and 19.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:22:58,163 INFO L168 Benchmark]: Boogie Preprocessor took 39.34 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.3 MB in the beginning and 39.9 MB in the end (delta: -20.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:22:58,163 INFO L168 Benchmark]: RCFGBuilder took 552.56 ms. Allocated memory is still 54.5 MB. Free memory was 39.9 MB in the beginning and 36.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-12-03 01:22:58,164 INFO L168 Benchmark]: TraceAbstraction took 451716.17 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 36.2 MB in the beginning and 18.2 MB in the end (delta: 18.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2020-12-03 01:22:58,165 INFO L168 Benchmark]: Witness Printer took 72.09 ms. Allocated memory is still 67.1 MB. Free memory was 18.2 MB in the beginning and 47.2 MB in the end (delta: -29.0 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2020-12-03 01:22:58,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 44.0 MB. Free memory was 24.8 MB in the beginning and 24.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.81 ms. Allocated memory is still 44.0 MB. Free memory was 21.9 MB in the beginning and 20.9 MB in the end (delta: 994.2 kB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.89 ms. Allocated memory is still 44.0 MB. Free memory was 20.9 MB in the beginning and 19.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.34 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.3 MB in the beginning and 39.9 MB in the end (delta: -20.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 552.56 ms. Allocated memory is still 54.5 MB. Free memory was 39.9 MB in the beginning and 36.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 451716.17 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 36.2 MB in the beginning and 18.2 MB in the end (delta: 18.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. * Witness Printer took 72.09 ms. Allocated memory is still 67.1 MB. Free memory was 18.2 MB in the beginning and 47.2 MB in the end (delta: -29.0 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) VAL [counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [counter=0] [L35] EXPR counter++ VAL [counter=1] [L35] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=1] [L35] EXPR counter++ VAL [counter=2] [L35] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=2] [L35] EXPR counter++ VAL [counter=3] [L35] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=3] [L35] EXPR counter++ VAL [counter=4] [L35] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND TRUE !(r >= d) VAL [counter=4] [L45] EXPR counter++ VAL [counter=5] [L45] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [counter=5] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [counter=5] [L45] EXPR counter++ VAL [counter=6] [L45] COND FALSE !(counter++<5) [L15] COND TRUE !(cond) VAL [counter=6] [L17] reach_error() VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 451.5s, OverallIterations: 17, TraceHistogramMax: 5, AutomataDifference: 386.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 605 SDtfs, 1473 SDslu, 2705 SDs, 0 SdLazy, 1857 SolverSat, 654 SolverUnsat, 35 SolverUnknown, 0 SolverNotchecked, 123.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 869 GetRequests, 612 SyntacticMatches, 1 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 315.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 431 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 56.9s InterpolantComputationTime, 461 NumberOfCodeBlocks, 461 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 736 ConstructedInterpolants, 32 QuantifiedInterpolants, 377773 SizeOfPredicates, 79 NumberOfNonLiveVariables, 1122 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 26/426 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! Received shutdown request...