./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer --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 5f460552172d7d814bb1f21e7e504c04c794318f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:26:54,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:26:54,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:26:54,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:26:54,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:26:54,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:26:54,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:26:54,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:26:54,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:26:54,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:26:54,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:26:54,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:26:54,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:26:54,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:26:54,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:26:54,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:26:54,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:26:54,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:26:54,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:26:54,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:26:54,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:26:54,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:26:54,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:26:54,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:26:54,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:26:54,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:26:54,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:26:54,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:26:54,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:26:54,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:26:54,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:26:54,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:26:54,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:26:54,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:26:54,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:26:54,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:26:54,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:26:54,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:26:54,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:26:54,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:26:54,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:26:54,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:26:55,036 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:26:55,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:26:55,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:26:55,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:26:55,039 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:26:55,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:26:55,040 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:26:55,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:26:55,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:26:55,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:26:55,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:26:55,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:26:55,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:26:55,042 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:26:55,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:26:55,043 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:26:55,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:26:55,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:26:55,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:26:55,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:26:55,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:26:55,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:26:55,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:26:55,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:26:55,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:26:55,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:26:55,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:26:55,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:26:55,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:26:55,046 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:/tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f460552172d7d814bb1f21e7e504c04c794318f [2020-11-30 01:26:55,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:26:55,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:26:55,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:26:55,378 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:26:55,379 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:26:55,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2020-11-30 01:26:55,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/data/7e7a6418f/8fe452533f4d47d886893caaaf772985/FLAG3221d1d85 [2020-11-30 01:26:56,015 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:26:56,016 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2020-11-30 01:26:56,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/data/7e7a6418f/8fe452533f4d47d886893caaaf772985/FLAG3221d1d85 [2020-11-30 01:26:56,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/data/7e7a6418f/8fe452533f4d47d886893caaaf772985 [2020-11-30 01:26:56,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:26:56,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:26:56,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:26:56,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:26:56,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:26:56,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aacfa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56, skipping insertion in model container [2020-11-30 01:26:56,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:26:56,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:26:56,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:26:56,687 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:26:56,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:26:56,733 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:26:56,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56 WrapperNode [2020-11-30 01:26:56,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:26:56,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:26:56,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:26:56,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:26:56,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:26:56,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:26:56,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:26:56,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:26:56,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:26:56,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:26:56,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:26:56,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:26:56,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:26:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:26:56,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:26:56,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:26:56,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:26:56,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:26:56,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:26:56,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:26:57,402 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:26:57,403 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-30 01:26:57,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:57 BoogieIcfgContainer [2020-11-30 01:26:57,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:26:57,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:26:57,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:26:57,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:26:57,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:26:56" (1/3) ... [2020-11-30 01:26:57,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c9adf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:26:57, skipping insertion in model container [2020-11-30 01:26:57,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (2/3) ... [2020-11-30 01:26:57,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c9adf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:26:57, skipping insertion in model container [2020-11-30 01:26:57,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:57" (3/3) ... [2020-11-30 01:26:57,414 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_2.c [2020-11-30 01:26:57,426 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:26:57,431 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:26:57,444 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:26:57,482 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:26:57,483 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:26:57,483 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:26:57,484 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:26:57,484 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:26:57,484 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:26:57,484 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:26:57,484 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:26:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-30 01:26:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:26:57,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:57,508 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:57,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-11-30 01:26:57,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:57,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260905000] [2020-11-30 01:26:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:57,609 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:26:57,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153397231] [2020-11-30 01:26:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:26:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 01:26:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:57,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260905000] [2020-11-30 01:26:57,701 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:26:57,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153397231] [2020-11-30 01:26:57,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:57,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:26:57,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531747893] [2020-11-30 01:26:57,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:26:57,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:57,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:26:57,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:26:57,724 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-11-30 01:26:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:57,740 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2020-11-30 01:26:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:26:57,741 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-30 01:26:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:57,749 INFO L225 Difference]: With dead ends: 40 [2020-11-30 01:26:57,750 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:26:57,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:26:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:26:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 01:26:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:26:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-11-30 01:26:57,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-11-30 01:26:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:57,786 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-11-30 01:26:57,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:26:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-11-30 01:26:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:26:57,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:58,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-30 01:26:58,013 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-11-30 01:26:58,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:58,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418951175] [2020-11-30 01:26:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:58,036 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:26:58,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971357] [2020-11-30 01:26:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:26:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:26:58,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:58,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418951175] [2020-11-30 01:26:58,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:26:58,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971357] [2020-11-30 01:26:58,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:58,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:26:58,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610458378] [2020-11-30 01:26:58,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:26:58,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:26:58,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:26:58,173 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-11-30 01:26:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:58,252 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-11-30 01:26:58,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:26:58,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-30 01:26:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:58,255 INFO L225 Difference]: With dead ends: 42 [2020-11-30 01:26:58,255 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 01:26:58,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:26:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 01:26:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-11-30 01:26:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 01:26:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-11-30 01:26:58,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-11-30 01:26:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:58,266 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-11-30 01:26:58,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:26:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-11-30 01:26:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:26:58,269 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:58,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:58,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:26:58,470 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2020-11-30 01:26:58,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:58,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281436310] [2020-11-30 01:26:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:58,483 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:26:58,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279599653] [2020-11-30 01:26:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:26:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:26:58,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:58,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281436310] [2020-11-30 01:26:58,602 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:26:58,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279599653] [2020-11-30 01:26:58,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:26:58,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-30 01:26:58,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518949692] [2020-11-30 01:26:58,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:26:58,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:58,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:26:58,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:58,607 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-11-30 01:26:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:58,718 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-11-30 01:26:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:26:58,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-30 01:26:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:58,721 INFO L225 Difference]: With dead ends: 54 [2020-11-30 01:26:58,721 INFO L226 Difference]: Without dead ends: 41 [2020-11-30 01:26:58,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-30 01:26:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2020-11-30 01:26:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:26:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-11-30 01:26:58,735 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-11-30 01:26:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:58,735 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-11-30 01:26:58,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:26:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-11-30 01:26:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 01:26:58,737 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:58,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:58,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:26:58,939 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:58,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:58,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2020-11-30 01:26:58,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:58,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740865600] [2020-11-30 01:26:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:58,950 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:26:58,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563822533] [2020-11-30 01:26:58,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:26:59,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-30 01:26:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:26:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:26:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 01:26:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740865600] [2020-11-30 01:26:59,076 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:26:59,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563822533] [2020-11-30 01:26:59,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:59,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:26:59,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096221881] [2020-11-30 01:26:59,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:26:59,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:26:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:59,079 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-11-30 01:26:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:59,184 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-11-30 01:26:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:26:59,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-11-30 01:26:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:59,186 INFO L225 Difference]: With dead ends: 35 [2020-11-30 01:26:59,186 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:26:59,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:26:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:26:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-11-30 01:26:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 01:26:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-11-30 01:26:59,193 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-11-30 01:26:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:59,194 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-11-30 01:26:59,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:26:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-11-30 01:26:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 01:26:59,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:59,195 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:59,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:26:59,417 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:59,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:59,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2020-11-30 01:26:59,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:59,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740825876] [2020-11-30 01:26:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:59,434 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:26:59,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005628861] [2020-11-30 01:26:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:26:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:26:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:59,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740825876] [2020-11-30 01:26:59,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:26:59,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005628861] [2020-11-30 01:26:59,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:26:59,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-30 01:26:59,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547978902] [2020-11-30 01:26:59,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:26:59,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:26:59,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:26:59,583 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-11-30 01:26:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:59,703 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-11-30 01:26:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:26:59,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-30 01:26:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:59,706 INFO L225 Difference]: With dead ends: 89 [2020-11-30 01:26:59,707 INFO L226 Difference]: Without dead ends: 71 [2020-11-30 01:26:59,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:26:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-30 01:26:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2020-11-30 01:26:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:26:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-11-30 01:26:59,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-11-30 01:26:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:59,718 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-11-30 01:26:59,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:26:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-11-30 01:26:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:26:59,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:59,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:59,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:26:59,920 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2020-11-30 01:26:59,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:59,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583498344] [2020-11-30 01:26:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:59,932 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:26:59,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333689151] [2020-11-30 01:26:59,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:26:59,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-30 01:26:59,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:26:59,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:26:59,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 01:27:00,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583498344] [2020-11-30 01:27:00,069 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:00,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333689151] [2020-11-30 01:27:00,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:00,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:27:00,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581596503] [2020-11-30 01:27:00,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:27:00,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:00,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:27:00,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:27:00,071 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2020-11-30 01:27:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:00,200 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-11-30 01:27:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:27:00,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-30 01:27:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:00,203 INFO L225 Difference]: With dead ends: 46 [2020-11-30 01:27:00,203 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 01:27:00,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:27:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 01:27:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-11-30 01:27:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-30 01:27:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-11-30 01:27:00,209 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2020-11-30 01:27:00,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:00,210 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-11-30 01:27:00,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:27:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-11-30 01:27:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 01:27:00,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:00,211 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:00,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:00,425 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:00,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1081936731, now seen corresponding path program 1 times [2020-11-30 01:27:00,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:00,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168662402] [2020-11-30 01:27:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:00,435 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:00,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230420137] [2020-11-30 01:27:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:27:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:00,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:27:00,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:27:00,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168662402] [2020-11-30 01:27:00,599 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:00,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230420137] [2020-11-30 01:27:00,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:00,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-30 01:27:00,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166072382] [2020-11-30 01:27:00,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:27:00,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:00,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:27:00,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:00,601 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2020-11-30 01:27:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:00,759 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-11-30 01:27:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:27:00,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-11-30 01:27:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:00,761 INFO L225 Difference]: With dead ends: 127 [2020-11-30 01:27:00,761 INFO L226 Difference]: Without dead ends: 104 [2020-11-30 01:27:00,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-30 01:27:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2020-11-30 01:27:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 01:27:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-11-30 01:27:00,778 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2020-11-30 01:27:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:00,778 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-11-30 01:27:00,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:27:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-11-30 01:27:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 01:27:00,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:00,781 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:00,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:00,997 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:00,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:00,998 INFO L82 PathProgramCache]: Analyzing trace with hash 56668152, now seen corresponding path program 2 times [2020-11-30 01:27:00,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:00,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183042995] [2020-11-30 01:27:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:01,012 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:01,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346484703] [2020-11-30 01:27:01,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:27:01,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:27:01,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:27:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:27:01,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183042995] [2020-11-30 01:27:01,223 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:01,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346484703] [2020-11-30 01:27:01,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:01,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-30 01:27:01,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736312482] [2020-11-30 01:27:01,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:27:01,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:01,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:27:01,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:27:01,224 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-11-30 01:27:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:01,392 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-11-30 01:27:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:27:01,393 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-11-30 01:27:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:01,394 INFO L225 Difference]: With dead ends: 149 [2020-11-30 01:27:01,395 INFO L226 Difference]: Without dead ends: 126 [2020-11-30 01:27:01,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:27:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-30 01:27:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2020-11-30 01:27:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-30 01:27:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-11-30 01:27:01,407 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2020-11-30 01:27:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:01,407 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-11-30 01:27:01,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:27:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-11-30 01:27:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-30 01:27:01,414 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:01,415 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:01,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-30 01:27:01,615 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:01,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1233260677, now seen corresponding path program 3 times [2020-11-30 01:27:01,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:01,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968626077] [2020-11-30 01:27:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:01,626 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:01,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653914545] [2020-11-30 01:27:01,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/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 [2020-11-30 01:27:01,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 01:27:01,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:27:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-11-30 01:27:01,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968626077] [2020-11-30 01:27:01,809 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:01,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653914545] [2020-11-30 01:27:01,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:01,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-30 01:27:01,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343278505] [2020-11-30 01:27:01,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:27:01,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:01,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:27:01,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:01,811 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2020-11-30 01:27:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:01,994 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-11-30 01:27:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:27:01,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-11-30 01:27:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:01,995 INFO L225 Difference]: With dead ends: 61 [2020-11-30 01:27:01,995 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 01:27:01,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:27:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 01:27:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-11-30 01:27:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 01:27:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-11-30 01:27:02,003 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2020-11-30 01:27:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:02,004 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-11-30 01:27:02,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:27:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-11-30 01:27:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-30 01:27:02,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:02,005 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:02,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:02,221 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash 178420843, now seen corresponding path program 4 times [2020-11-30 01:27:02,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:02,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776165684] [2020-11-30 01:27:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:02,230 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:02,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795051416] [2020-11-30 01:27:02,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:02,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:27:02,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:02,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:27:02,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:02,327 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-11-30 01:27:02,327 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:27:02,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:27:02,336 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:27:02,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-11-30 01:27:02,373 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-11-30 01:27:02,374 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:27:02,379 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:27:02,380 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:27:02,381 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-11-30 01:27:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-30 01:27:02,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776165684] [2020-11-30 01:27:02,393 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:02,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795051416] [2020-11-30 01:27:02,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:02,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:27:02,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101112948] [2020-11-30 01:27:02,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:27:02,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:27:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:02,395 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 5 states. [2020-11-30 01:27:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:02,479 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2020-11-30 01:27:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:27:02,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-11-30 01:27:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:02,481 INFO L225 Difference]: With dead ends: 103 [2020-11-30 01:27:02,481 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 01:27:02,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:27:02,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 01:27:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-11-30 01:27:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-30 01:27:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-11-30 01:27:02,489 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-11-30 01:27:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:02,489 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-11-30 01:27:02,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:27:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-11-30 01:27:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-30 01:27:02,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:02,490 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:02,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:02,717 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash -52716179, now seen corresponding path program 1 times [2020-11-30 01:27:02,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:02,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126143993] [2020-11-30 01:27:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:02,725 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:02,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849785088] [2020-11-30 01:27:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:02,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:27:02,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-30 01:27:02,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126143993] [2020-11-30 01:27:02,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:02,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849785088] [2020-11-30 01:27:02,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:02,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-30 01:27:02,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550918154] [2020-11-30 01:27:02,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:27:02,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:02,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:27:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:27:02,943 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 9 states. [2020-11-30 01:27:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:03,099 INFO L93 Difference]: Finished difference Result 201 states and 235 transitions. [2020-11-30 01:27:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:27:03,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-11-30 01:27:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:03,101 INFO L225 Difference]: With dead ends: 201 [2020-11-30 01:27:03,101 INFO L226 Difference]: Without dead ends: 171 [2020-11-30 01:27:03,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:27:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-30 01:27:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2020-11-30 01:27:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-30 01:27:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-11-30 01:27:03,111 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 46 [2020-11-30 01:27:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:03,111 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-11-30 01:27:03,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:27:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-11-30 01:27:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-30 01:27:03,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:03,115 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:03,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-30 01:27:03,316 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:03,316 INFO L82 PathProgramCache]: Analyzing trace with hash 412370040, now seen corresponding path program 2 times [2020-11-30 01:27:03,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:03,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623812714] [2020-11-30 01:27:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:03,323 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:03,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279208710] [2020-11-30 01:27:03,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:03,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:27:03,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:03,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:27:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-30 01:27:03,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623812714] [2020-11-30 01:27:03,532 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:03,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279208710] [2020-11-30 01:27:03,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:03,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-30 01:27:03,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870197127] [2020-11-30 01:27:03,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:27:03,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:03,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:27:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:27:03,534 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-11-30 01:27:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:03,716 INFO L93 Difference]: Finished difference Result 228 states and 266 transitions. [2020-11-30 01:27:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:27:03,717 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-11-30 01:27:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:03,718 INFO L225 Difference]: With dead ends: 228 [2020-11-30 01:27:03,718 INFO L226 Difference]: Without dead ends: 198 [2020-11-30 01:27:03,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:27:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-30 01:27:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 66. [2020-11-30 01:27:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-30 01:27:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-11-30 01:27:03,727 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 51 [2020-11-30 01:27:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:03,727 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-11-30 01:27:03,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:27:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-11-30 01:27:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-30 01:27:03,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:03,729 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:03,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:03,957 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1678685107, now seen corresponding path program 3 times [2020-11-30 01:27:03,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:03,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580552613] [2020-11-30 01:27:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:03,968 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:03,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048578775] [2020-11-30 01:27:03,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:04,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 01:27:04,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:27:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:20,288 WARN L193 SmtUtils]: Spent 16.19 s on a formula simplification that was a NOOP. DAG size: 32 [2020-11-30 01:27:20,294 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 5, 1] term [2020-11-30 01:27:20,295 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-30 01:27:22,431 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 18 [2020-11-30 01:27:22,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:27:22,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:27:28,881 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-11-30 01:27:31,011 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-30 01:27:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:27:31,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580552613] [2020-11-30 01:27:31,097 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:31,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048578775] [2020-11-30 01:27:31,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:31,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-30 01:27:31,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382542432] [2020-11-30 01:27:31,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:27:31,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:31,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:27:31,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:31,099 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 7 states. [2020-11-30 01:27:39,882 WARN L193 SmtUtils]: Spent 8.71 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-11-30 01:27:48,509 WARN L193 SmtUtils]: Spent 8.59 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-11-30 01:27:59,165 WARN L193 SmtUtils]: Spent 10.52 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-11-30 01:28:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:01,683 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2020-11-30 01:28:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:28:01,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-11-30 01:28:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:01,697 INFO L225 Difference]: With dead ends: 104 [2020-11-30 01:28:01,697 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 01:28:01,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:28:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 01:28:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-11-30 01:28:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-30 01:28:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-11-30 01:28:01,713 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 56 [2020-11-30 01:28:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:01,715 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-11-30 01:28:01,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:28:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-11-30 01:28:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-30 01:28:01,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:01,723 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:01,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-30 01:28:01,937 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:01,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1402090260, now seen corresponding path program 1 times [2020-11-30 01:28:01,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:01,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343630304] [2020-11-30 01:28:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:01,947 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:28:01,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503181620] [2020-11-30 01:28:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:28:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:28:02,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-30 01:28:02,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343630304] [2020-11-30 01:28:02,321 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:28:02,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503181620] [2020-11-30 01:28:02,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:28:02,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-30 01:28:02,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285073306] [2020-11-30 01:28:02,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:28:02,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:02,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:28:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:28:02,324 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 12 states. [2020-11-30 01:28:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:02,736 INFO L93 Difference]: Finished difference Result 300 states and 352 transitions. [2020-11-30 01:28:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:28:02,739 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-11-30 01:28:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:02,741 INFO L225 Difference]: With dead ends: 300 [2020-11-30 01:28:02,741 INFO L226 Difference]: Without dead ends: 261 [2020-11-30 01:28:02,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:28:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-11-30 01:28:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 85. [2020-11-30 01:28:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-30 01:28:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-11-30 01:28:02,769 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 61 [2020-11-30 01:28:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:02,769 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-11-30 01:28:02,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:28:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-11-30 01:28:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-30 01:28:02,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:02,771 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:02,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:02,997 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:02,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1941116876, now seen corresponding path program 2 times [2020-11-30 01:28:02,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:02,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544496230] [2020-11-30 01:28:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:03,007 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:28:03,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195092326] [2020-11-30 01:28:03,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:03,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:28:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:03,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:28:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-30 01:28:03,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544496230] [2020-11-30 01:28:03,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:28:03,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195092326] [2020-11-30 01:28:03,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:28:03,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-30 01:28:03,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122994951] [2020-11-30 01:28:03,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:28:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:03,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:28:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:28:03,410 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 14 states. [2020-11-30 01:28:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:03,886 INFO L93 Difference]: Finished difference Result 354 states and 414 transitions. [2020-11-30 01:28:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:28:03,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-11-30 01:28:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:03,891 INFO L225 Difference]: With dead ends: 354 [2020-11-30 01:28:03,891 INFO L226 Difference]: Without dead ends: 315 [2020-11-30 01:28:03,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:28:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-11-30 01:28:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 95. [2020-11-30 01:28:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-30 01:28:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-11-30 01:28:03,908 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 71 [2020-11-30 01:28:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:03,909 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-11-30 01:28:03,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:28:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-11-30 01:28:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-30 01:28:03,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:03,910 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:04,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-30 01:28:04,111 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:04,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:04,111 INFO L82 PathProgramCache]: Analyzing trace with hash -209734316, now seen corresponding path program 3 times [2020-11-30 01:28:04,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:04,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101908470] [2020-11-30 01:28:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:04,118 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:28:04,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778729983] [2020-11-30 01:28:04,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:04,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:28:04,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:04,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 01:28:04,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-11-30 01:28:04,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101908470] [2020-11-30 01:28:04,667 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:28:04,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778729983] [2020-11-30 01:28:04,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:28:04,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-30 01:28:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711978666] [2020-11-30 01:28:04,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:28:04,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:28:04,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:28:04,669 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 9 states. [2020-11-30 01:28:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:05,457 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-11-30 01:28:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:28:05,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2020-11-30 01:28:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:05,459 INFO L225 Difference]: With dead ends: 108 [2020-11-30 01:28:05,459 INFO L226 Difference]: Without dead ends: 106 [2020-11-30 01:28:05,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:28:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-30 01:28:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2020-11-30 01:28:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-30 01:28:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2020-11-30 01:28:05,469 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 81 [2020-11-30 01:28:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:05,469 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2020-11-30 01:28:05,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:28:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2020-11-30 01:28:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-30 01:28:05,470 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:05,470 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:05,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 01:28:05,693 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:05,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1388740860, now seen corresponding path program 4 times [2020-11-30 01:28:05,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:05,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038953902] [2020-11-30 01:28:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:05,699 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:28:05,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267299309] [2020-11-30 01:28:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:05,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:28:05,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:05,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 01:28:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-30 01:28:06,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038953902] [2020-11-30 01:28:06,245 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:28:06,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267299309] [2020-11-30 01:28:06,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:28:06,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-30 01:28:06,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885538121] [2020-11-30 01:28:06,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 01:28:06,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:06,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 01:28:06,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:28:06,252 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand 16 states. [2020-11-30 01:28:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:06,779 INFO L93 Difference]: Finished difference Result 464 states and 543 transitions. [2020-11-30 01:28:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 01:28:06,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-11-30 01:28:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:06,784 INFO L225 Difference]: With dead ends: 464 [2020-11-30 01:28:06,785 INFO L226 Difference]: Without dead ends: 420 [2020-11-30 01:28:06,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:28:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-11-30 01:28:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 110. [2020-11-30 01:28:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-30 01:28:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2020-11-30 01:28:06,799 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 86 [2020-11-30 01:28:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:06,799 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2020-11-30 01:28:06,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 01:28:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2020-11-30 01:28:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-30 01:28:06,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:06,801 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:07,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-30 01:28:07,017 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1648087004, now seen corresponding path program 5 times [2020-11-30 01:28:07,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:07,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631242786] [2020-11-30 01:28:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:07,028 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:28:07,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512944663] [2020-11-30 01:28:07,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:07,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-30 01:28:07,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:07,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 01:28:07,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-30 01:28:07,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631242786] [2020-11-30 01:28:07,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:28:07,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512944663] [2020-11-30 01:28:07,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:28:07,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-30 01:28:07,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584241812] [2020-11-30 01:28:07,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:28:07,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:28:07,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:28:07,819 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand 18 states. [2020-11-30 01:28:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:08,457 INFO L93 Difference]: Finished difference Result 528 states and 617 transitions. [2020-11-30 01:28:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 01:28:08,460 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-11-30 01:28:08,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:08,463 INFO L225 Difference]: With dead ends: 528 [2020-11-30 01:28:08,463 INFO L226 Difference]: Without dead ends: 484 [2020-11-30 01:28:08,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:28:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-11-30 01:28:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 120. [2020-11-30 01:28:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-30 01:28:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2020-11-30 01:28:08,483 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 96 [2020-11-30 01:28:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:08,484 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2020-11-30 01:28:08,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:28:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2020-11-30 01:28:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-30 01:28:08,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:28:08,485 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:28:08,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-30 01:28:08,709 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:28:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:28:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1510213308, now seen corresponding path program 6 times [2020-11-30 01:28:08,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:28:08,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718445179] [2020-11-30 01:28:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:28:08,717 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:28:08,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725509127] [2020-11-30 01:28:08,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:09,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-30 01:28:09,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:28:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:28:09,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:28:09,156 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-11-30 01:28:09,157 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:28:09,190 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:28:09,190 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:28:09,191 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-11-30 01:28:09,273 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-11-30 01:28:09,274 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:28:09,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:28:09,300 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:28:09,300 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2020-11-30 01:28:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-11-30 01:28:09,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718445179] [2020-11-30 01:28:09,536 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:28:09,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725509127] [2020-11-30 01:28:09,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:28:09,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-30 01:28:09,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733532381] [2020-11-30 01:28:09,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:28:09,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:28:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:28:09,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:28:09,538 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand 9 states. [2020-11-30 01:28:10,478 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-11-30 01:28:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:28:10,676 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-11-30 01:28:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:28:10,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 106 [2020-11-30 01:28:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:28:10,679 INFO L225 Difference]: With dead ends: 185 [2020-11-30 01:28:10,679 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:28:10,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:28:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:28:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:28:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:28:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:28:10,680 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2020-11-30 01:28:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:28:10,680 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:28:10,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:28:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:28:10,681 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:28:10,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:28:10,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:28:12,203 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 401 DAG size of output: 158 [2020-11-30 01:28:13,311 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 154 DAG size of output: 11 [2020-11-30 01:28:13,314 INFO L274 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point L23-2(line 23) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-30 01:28:13,315 INFO L274 CegarLoopResult]: For program point L16-2(lines 16 21) no Hoare annotation was computed. [2020-11-30 01:28:13,316 INFO L270 CegarLoopResult]: At program point L16-3(lines 16 21) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~i~0) (= ~N~0 1000) (= ULTIMATE.start_main_~R~0 2) (= ULTIMATE.start_main_~j~0 0)) [2020-11-30 01:28:13,316 INFO L274 CegarLoopResult]: For program point L16-4(lines 16 21) no Hoare annotation was computed. [2020-11-30 01:28:13,316 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-30 01:28:13,316 INFO L274 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-11-30 01:28:13,316 INFO L274 CegarLoopResult]: For program point L4-3(lines 1 28) no Hoare annotation was computed. [2020-11-30 01:28:13,316 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:28:13,316 INFO L277 CegarLoopResult]: At program point L26(lines 11 27) the Hoare annotation is: true [2020-11-30 01:28:13,316 INFO L270 CegarLoopResult]: At program point L22-2(lines 22 25) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~i~0) (= ~N~0 1000) (= ULTIMATE.start_main_~R~0 2)) [2020-11-30 01:28:13,317 INFO L274 CegarLoopResult]: For program point L22-3(lines 22 25) no Hoare annotation was computed. [2020-11-30 01:28:13,317 INFO L274 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-11-30 01:28:13,317 INFO L274 CegarLoopResult]: For program point L18-2(lines 18 19) no Hoare annotation was computed. [2020-11-30 01:28:13,317 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-11-30 01:28:13,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:28:13 BoogieIcfgContainer [2020-11-30 01:28:13,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:28:13,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:28:13,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:28:13,347 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:28:13,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:57" (3/4) ... [2020-11-30 01:28:13,351 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:28:13,366 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-30 01:28:13,367 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:28:13,367 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:28:13,367 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:28:13,409 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1e801a33-adf6-4b96-88f1-777bec918a3e/bin/uautomizer/witness.graphml [2020-11-30 01:28:13,409 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:28:13,410 INFO L168 Benchmark]: Toolchain (without parser) took 77027.16 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 67.9 MB in the beginning and 68.4 MB in the end (delta: -493.4 kB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:28:13,410 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 73.4 MB. Free memory was 33.6 MB in the beginning and 33.6 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:28:13,411 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.64 ms. Allocated memory is still 100.7 MB. Free memory was 67.8 MB in the beginning and 77.0 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:28:13,411 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.91 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 74.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:28:13,412 INFO L168 Benchmark]: Boogie Preprocessor took 50.21 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 73.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:28:13,412 INFO L168 Benchmark]: RCFGBuilder took 553.49 ms. Allocated memory is still 100.7 MB. Free memory was 73.7 MB in the beginning and 59.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:28:13,413 INFO L168 Benchmark]: TraceAbstraction took 75939.44 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 58.5 MB in the beginning and 70.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 56.3 MB. Max. memory is 16.1 GB. [2020-11-30 01:28:13,413 INFO L168 Benchmark]: Witness Printer took 62.25 ms. Allocated memory is still 121.6 MB. Free memory was 70.5 MB in the beginning and 68.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:28:13,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 73.4 MB. Free memory was 33.6 MB in the beginning and 33.6 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.64 ms. Allocated memory is still 100.7 MB. Free memory was 67.8 MB in the beginning and 77.0 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.91 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 74.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.21 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 73.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 553.49 ms. Allocated memory is still 100.7 MB. Free memory was 73.7 MB in the beginning and 59.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 75939.44 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 58.5 MB in the beginning and 70.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 56.3 MB. Max. memory is 16.1 GB. * Witness Printer took 62.25 ms. Allocated memory is still 121.6 MB. Free memory was 70.5 MB in the beginning and 68.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((0 <= i && N == 1000) && R == 2) && j == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (0 <= i && N == 1000) && R == 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 73.4s, OverallIterations: 19, TraceHistogramMax: 16, AutomataDifference: 36.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 248 SDtfs, 1612 SDslu, 796 SDs, 0 SdLazy, 1359 SolverSat, 285 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 922 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 58.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 1540 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 31 NumberOfFragments, 24 HoareAnnotationTreeSize, 3 FomulaSimplifications, 609100122175 FormulaSimplificationTreeSizeReduction, 1.3s HoareSimplificationTime, 3 FomulaSimplificationsInter, 92462 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 30.3s InterpolantComputationTime, 914 NumberOfCodeBlocks, 714 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 895 ConstructedInterpolants, 38 QuantifiedInterpolants, 379055 SizeOfPredicates, 61 NumberOfNonLiveVariables, 2386 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 1286/2779 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 correct! Received shutdown request...