./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.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_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 da2855a3b9d79ea31d743c942a3327e8ed25edbd ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:31:04,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:31:04,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:31:04,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:31:04,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:31:04,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:31:04,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:31:04,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:31:04,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:31:04,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:31:04,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:31:04,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:31:04,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:31:04,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:31:04,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:31:04,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:31:04,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:31:04,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:31:04,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:31:04,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:31:04,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:31:04,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:31:04,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:31:04,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:31:04,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:31:04,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:31:04,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:31:04,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:31:04,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:31:04,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:31:04,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:31:04,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:31:04,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:31:04,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:31:05,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:31:05,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:31:05,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:31:05,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:31:05,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:31:05,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:31:05,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:31:05,007 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:31:05,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:31:05,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:31:05,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:31:05,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:31:05,038 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:31:05,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:31:05,039 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:31:05,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:31:05,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:31:05,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:31:05,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:31:05,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:31:05,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:31:05,041 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:31:05,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:31:05,041 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:31:05,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:31:05,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:31:05,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:31:05,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:31:05,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:31:05,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:31:05,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:31:05,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:31:05,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:31:05,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:31:05,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:31:05,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:31:05,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:31:05,046 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_379273f1-23b9-46b1-8519-5789ab76ccc5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da2855a3b9d79ea31d743c942a3327e8ed25edbd [2020-11-29 19:31:05,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:31:05,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:31:05,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:31:05,429 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:31:05,432 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:31:05,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-11-29 19:31:05,555 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/data/868324579/19a5baf1352c4d36a074913c9cc117d6/FLAG5137ca8a6 [2020-11-29 19:31:06,163 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:31:06,168 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-11-29 19:31:06,181 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/data/868324579/19a5baf1352c4d36a074913c9cc117d6/FLAG5137ca8a6 [2020-11-29 19:31:06,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/data/868324579/19a5baf1352c4d36a074913c9cc117d6 [2020-11-29 19:31:06,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:31:06,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:31:06,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:31:06,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:31:06,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:31:06,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27be1bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06, skipping insertion in model container [2020-11-29 19:31:06,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:31:06,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:31:06,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:31:06,751 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:31:06,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:31:06,799 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:31:06,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06 WrapperNode [2020-11-29 19:31:06,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:31:06,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:31:06,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:31:06,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:31:06,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:31:06,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:31:06,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:31:06,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:31:06,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... [2020-11-29 19:31:06,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:31:06,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:31:06,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:31:06,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:31:06,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:07,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:31:07,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:31:07,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:31:07,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:31:07,587 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:31:07,588 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-29 19:31:07,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:31:07 BoogieIcfgContainer [2020-11-29 19:31:07,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:31:07,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:31:07,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:31:07,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:31:07,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:31:06" (1/3) ... [2020-11-29 19:31:07,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b5288b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:31:07, skipping insertion in model container [2020-11-29 19:31:07,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:06" (2/3) ... [2020-11-29 19:31:07,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b5288b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:31:07, skipping insertion in model container [2020-11-29 19:31:07,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:31:07" (3/3) ... [2020-11-29 19:31:07,619 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2020-11-29 19:31:07,632 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:31:07,638 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-29 19:31:07,650 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-29 19:31:07,683 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:31:07,683 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:31:07,683 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:31:07,683 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:31:07,684 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:31:07,685 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:31:07,685 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:31:07,685 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:31:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-29 19:31:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:31:07,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:07,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:07,722 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1233216625, now seen corresponding path program 1 times [2020-11-29 19:31:07,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:07,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671477746] [2020-11-29 19:31:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:08,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671477746] [2020-11-29 19:31:08,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:08,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:31:08,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754731064] [2020-11-29 19:31:08,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:31:08,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:08,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:31:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:31:08,041 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-11-29 19:31:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:08,075 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2020-11-29 19:31:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:31:08,077 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 19:31:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:08,089 INFO L225 Difference]: With dead ends: 77 [2020-11-29 19:31:08,090 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 19:31:08,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:31:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 19:31:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-29 19:31:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 19:31:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-11-29 19:31:08,140 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2020-11-29 19:31:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:08,141 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-29 19:31:08,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:31:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-11-29 19:31:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:31:08,142 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:08,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:08,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:31:08,143 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1507355568, now seen corresponding path program 1 times [2020-11-29 19:31:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:08,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084996879] [2020-11-29 19:31:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:08,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:08,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94857272] [2020-11-29 19:31:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:08,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:31:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:08,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084996879] [2020-11-29 19:31:08,371 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:08,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94857272] [2020-11-29 19:31:08,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:08,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:31:08,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101966692] [2020-11-29 19:31:08,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:31:08,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:31:08,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:31:08,376 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2020-11-29 19:31:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:08,430 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-11-29 19:31:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:31:08,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 19:31:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:08,432 INFO L225 Difference]: With dead ends: 42 [2020-11-29 19:31:08,432 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 19:31:08,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:31:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 19:31:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-29 19:31:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 19:31:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-11-29 19:31:08,442 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2020-11-29 19:31:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:08,443 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-11-29 19:31:08,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:31:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-11-29 19:31:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:31:08,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:08,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:08,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 19:31:08,671 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash 515750889, now seen corresponding path program 1 times [2020-11-29 19:31:08,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:08,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257308566] [2020-11-29 19:31:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:08,710 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:08,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189782402] [2020-11-29 19:31:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:08,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:31:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:08,889 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:31:08,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:31:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:08,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257308566] [2020-11-29 19:31:08,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:08,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189782402] [2020-11-29 19:31:08,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:08,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:31:08,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733391984] [2020-11-29 19:31:08,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:31:08,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:08,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:31:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:31:08,936 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2020-11-29 19:31:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:09,140 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-11-29 19:31:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:31:09,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-29 19:31:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:09,146 INFO L225 Difference]: With dead ends: 66 [2020-11-29 19:31:09,146 INFO L226 Difference]: Without dead ends: 62 [2020-11-29 19:31:09,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:31:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-29 19:31:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2020-11-29 19:31:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 19:31:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-11-29 19:31:09,162 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2020-11-29 19:31:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:09,162 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-11-29 19:31:09,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:31:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-11-29 19:31:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:31:09,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:09,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:09,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:09,382 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:09,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2020-11-29 19:31:09,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:09,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196923625] [2020-11-29 19:31:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:09,421 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:09,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230138396] [2020-11-29 19:31:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 19:31:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:09,578 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:31:09,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:31:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:09,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196923625] [2020-11-29 19:31:09,669 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:09,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230138396] [2020-11-29 19:31:09,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:09,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:31:09,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867307295] [2020-11-29 19:31:09,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:31:09,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:31:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:31:09,672 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 6 states. [2020-11-29 19:31:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:09,961 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-11-29 19:31:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:31:09,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 19:31:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:09,964 INFO L225 Difference]: With dead ends: 62 [2020-11-29 19:31:09,964 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 19:31:09,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:31:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 19:31:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-11-29 19:31:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 19:31:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-11-29 19:31:09,980 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2020-11-29 19:31:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:09,980 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-11-29 19:31:09,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:31:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-11-29 19:31:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:31:09,982 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:09,982 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:10,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:10,184 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash -533984263, now seen corresponding path program 1 times [2020-11-29 19:31:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:10,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161335450] [2020-11-29 19:31:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:10,209 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:10,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247845749] [2020-11-29 19:31:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:31:10,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:10,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161335450] [2020-11-29 19:31:10,380 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:10,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247845749] [2020-11-29 19:31:10,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:31:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787816763] [2020-11-29 19:31:10,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:31:10,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:10,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:31:10,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:31:10,383 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 5 states. [2020-11-29 19:31:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:10,423 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-11-29 19:31:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:31:10,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-29 19:31:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:10,427 INFO L225 Difference]: With dead ends: 85 [2020-11-29 19:31:10,427 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 19:31:10,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:31:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 19:31:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-29 19:31:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 19:31:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-11-29 19:31:10,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2020-11-29 19:31:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:10,440 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-11-29 19:31:10,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:31:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-11-29 19:31:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:31:10,441 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:10,441 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:10,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:10,659 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:10,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1239576457, now seen corresponding path program 1 times [2020-11-29 19:31:10,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:10,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915362757] [2020-11-29 19:31:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:10,683 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:10,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745674965] [2020-11-29 19:31:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:31:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:10,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915362757] [2020-11-29 19:31:10,867 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:10,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745674965] [2020-11-29 19:31:10,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:10,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 19:31:10,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673793857] [2020-11-29 19:31:10,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:31:10,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:31:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:31:10,869 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 6 states. [2020-11-29 19:31:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:10,938 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2020-11-29 19:31:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:31:10,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-29 19:31:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:10,949 INFO L225 Difference]: With dead ends: 64 [2020-11-29 19:31:10,949 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 19:31:10,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:31:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 19:31:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-11-29 19:31:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 19:31:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-11-29 19:31:10,966 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2020-11-29 19:31:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:10,967 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-11-29 19:31:10,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:31:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-11-29 19:31:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:31:10,968 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:10,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:11,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 19:31:11,190 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:11,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:11,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1291970880, now seen corresponding path program 1 times [2020-11-29 19:31:11,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:11,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440522103] [2020-11-29 19:31:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:11,210 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:11,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252816005] [2020-11-29 19:31:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:11,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:31:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:11,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440522103] [2020-11-29 19:31:11,312 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:11,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252816005] [2020-11-29 19:31:11,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:11,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:31:11,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883567632] [2020-11-29 19:31:11,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:31:11,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:11,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:31:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:31:11,314 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 4 states. [2020-11-29 19:31:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:11,428 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-11-29 19:31:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:31:11,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 19:31:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:11,430 INFO L225 Difference]: With dead ends: 66 [2020-11-29 19:31:11,430 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 19:31:11,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:31:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 19:31:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-29 19:31:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 19:31:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-11-29 19:31:11,445 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2020-11-29 19:31:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:11,452 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-11-29 19:31:11,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:31:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-11-29 19:31:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:31:11,453 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:11,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:11,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:11,678 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash 226968738, now seen corresponding path program 1 times [2020-11-29 19:31:11,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:11,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405105640] [2020-11-29 19:31:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:11,696 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:11,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924381128] [2020-11-29 19:31:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:11,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:31:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:11,813 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:31:11,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:31:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:11,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405105640] [2020-11-29 19:31:11,896 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:11,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924381128] [2020-11-29 19:31:11,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:11,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 19:31:11,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423509772] [2020-11-29 19:31:11,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:31:11,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:31:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:31:11,899 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 7 states. [2020-11-29 19:31:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:12,318 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2020-11-29 19:31:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:31:12,319 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-29 19:31:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:12,321 INFO L225 Difference]: With dead ends: 191 [2020-11-29 19:31:12,322 INFO L226 Difference]: Without dead ends: 187 [2020-11-29 19:31:12,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:31:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-29 19:31:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2020-11-29 19:31:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 19:31:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-11-29 19:31:12,367 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2020-11-29 19:31:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:12,368 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-11-29 19:31:12,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:31:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-11-29 19:31:12,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:31:12,371 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:12,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:12,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:12,590 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:12,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:12,591 INFO L82 PathProgramCache]: Analyzing trace with hash -338279005, now seen corresponding path program 1 times [2020-11-29 19:31:12,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:12,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944333428] [2020-11-29 19:31:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:12,622 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:12,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413562868] [2020-11-29 19:31:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 19:31:12,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:12,744 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:31:12,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:31:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:12,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944333428] [2020-11-29 19:31:12,838 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:12,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413562868] [2020-11-29 19:31:12,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:12,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 19:31:12,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543932879] [2020-11-29 19:31:12,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:31:12,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:12,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:31:12,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:31:12,840 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 7 states. [2020-11-29 19:31:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:13,127 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2020-11-29 19:31:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:31:13,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-11-29 19:31:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:13,130 INFO L225 Difference]: With dead ends: 111 [2020-11-29 19:31:13,130 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 19:31:13,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:31:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 19:31:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-11-29 19:31:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-29 19:31:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2020-11-29 19:31:13,149 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2020-11-29 19:31:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:13,150 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2020-11-29 19:31:13,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:31:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2020-11-29 19:31:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:31:13,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:13,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:13,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 19:31:13,386 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:13,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1331579206, now seen corresponding path program 1 times [2020-11-29 19:31:13,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:13,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945183451] [2020-11-29 19:31:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:13,419 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:13,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808793085] [2020-11-29 19:31:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 19:31:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:13,540 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:31:13,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:31:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:13,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945183451] [2020-11-29 19:31:13,631 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:13,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808793085] [2020-11-29 19:31:13,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:13,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 19:31:13,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550141971] [2020-11-29 19:31:13,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:31:13,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:13,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:31:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:31:13,634 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 7 states. [2020-11-29 19:31:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:14,098 INFO L93 Difference]: Finished difference Result 162 states and 210 transitions. [2020-11-29 19:31:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:31:14,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-29 19:31:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:14,100 INFO L225 Difference]: With dead ends: 162 [2020-11-29 19:31:14,100 INFO L226 Difference]: Without dead ends: 160 [2020-11-29 19:31:14,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:31:14,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-29 19:31:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2020-11-29 19:31:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-29 19:31:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2020-11-29 19:31:14,121 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 22 [2020-11-29 19:31:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:14,122 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2020-11-29 19:31:14,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:31:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2020-11-29 19:31:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:31:14,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:14,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:14,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:14,339 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1657245482, now seen corresponding path program 1 times [2020-11-29 19:31:14,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:14,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487581653] [2020-11-29 19:31:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:14,354 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:14,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787978907] [2020-11-29 19:31:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:14,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 19:31:14,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:14,466 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:31:14,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:31:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:14,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487581653] [2020-11-29 19:31:14,614 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:14,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787978907] [2020-11-29 19:31:14,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:14,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 19:31:14,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567579682] [2020-11-29 19:31:14,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:31:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:31:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:31:14,618 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand 9 states. [2020-11-29 19:31:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:15,122 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2020-11-29 19:31:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:31:15,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-11-29 19:31:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:15,125 INFO L225 Difference]: With dead ends: 183 [2020-11-29 19:31:15,125 INFO L226 Difference]: Without dead ends: 181 [2020-11-29 19:31:15,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:31:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-11-29 19:31:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2020-11-29 19:31:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-29 19:31:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2020-11-29 19:31:15,162 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 23 [2020-11-29 19:31:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:15,163 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2020-11-29 19:31:15,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:31:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2020-11-29 19:31:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:31:15,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:15,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:15,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:15,386 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1336387389, now seen corresponding path program 1 times [2020-11-29 19:31:15,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:15,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86239595] [2020-11-29 19:31:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:15,435 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:15,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463146293] [2020-11-29 19:31:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:15,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:31:15,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:15,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86239595] [2020-11-29 19:31:15,571 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:15,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463146293] [2020-11-29 19:31:15,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:15,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:31:15,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865104803] [2020-11-29 19:31:15,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:31:15,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:31:15,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:31:15,574 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand 6 states. [2020-11-29 19:31:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:15,639 INFO L93 Difference]: Finished difference Result 226 states and 300 transitions. [2020-11-29 19:31:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:31:15,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-29 19:31:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:15,642 INFO L225 Difference]: With dead ends: 226 [2020-11-29 19:31:15,642 INFO L226 Difference]: Without dead ends: 155 [2020-11-29 19:31:15,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:31:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-29 19:31:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-11-29 19:31:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-29 19:31:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 206 transitions. [2020-11-29 19:31:15,664 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 206 transitions. Word has length 23 [2020-11-29 19:31:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:15,664 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 206 transitions. [2020-11-29 19:31:15,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:31:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 206 transitions. [2020-11-29 19:31:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:31:15,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:15,666 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:15,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 19:31:15,882 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:15,883 INFO L82 PathProgramCache]: Analyzing trace with hash 365432544, now seen corresponding path program 1 times [2020-11-29 19:31:15,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:15,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979496519] [2020-11-29 19:31:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:15,908 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:15,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443755983] [2020-11-29 19:31:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:31:15,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:16,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979496519] [2020-11-29 19:31:16,059 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:16,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443755983] [2020-11-29 19:31:16,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:16,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 19:31:16,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562614417] [2020-11-29 19:31:16,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:31:16,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:16,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:31:16,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:31:16,062 INFO L87 Difference]: Start difference. First operand 155 states and 206 transitions. Second operand 7 states. [2020-11-29 19:31:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:16,149 INFO L93 Difference]: Finished difference Result 240 states and 323 transitions. [2020-11-29 19:31:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:31:16,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-11-29 19:31:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:16,152 INFO L225 Difference]: With dead ends: 240 [2020-11-29 19:31:16,152 INFO L226 Difference]: Without dead ends: 160 [2020-11-29 19:31:16,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:31:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-29 19:31:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-11-29 19:31:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-29 19:31:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2020-11-29 19:31:16,173 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 24 [2020-11-29 19:31:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:16,176 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2020-11-29 19:31:16,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:31:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2020-11-29 19:31:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:31:16,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:16,182 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:16,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 19:31:16,410 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:16,411 INFO L82 PathProgramCache]: Analyzing trace with hash 872540784, now seen corresponding path program 2 times [2020-11-29 19:31:16,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:16,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175373083] [2020-11-29 19:31:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:16,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:16,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675254381] [2020-11-29 19:31:16,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:16,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:31:16,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:31:16,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:31:16,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:16,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175373083] [2020-11-29 19:31:16,614 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:16,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675254381] [2020-11-29 19:31:16,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:16,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 19:31:16,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697246434] [2020-11-29 19:31:16,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:31:16,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:16,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:31:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:31:16,618 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand 8 states. [2020-11-29 19:31:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:16,725 INFO L93 Difference]: Finished difference Result 187 states and 242 transitions. [2020-11-29 19:31:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:31:16,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-11-29 19:31:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:16,728 INFO L225 Difference]: With dead ends: 187 [2020-11-29 19:31:16,728 INFO L226 Difference]: Without dead ends: 183 [2020-11-29 19:31:16,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:31:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-29 19:31:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 166. [2020-11-29 19:31:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-11-29 19:31:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2020-11-29 19:31:16,756 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 25 [2020-11-29 19:31:16,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:16,756 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2020-11-29 19:31:16,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:31:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2020-11-29 19:31:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:31:16,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:16,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:16,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 19:31:16,986 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:16,987 INFO L82 PathProgramCache]: Analyzing trace with hash 820146361, now seen corresponding path program 1 times [2020-11-29 19:31:16,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:16,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188629276] [2020-11-29 19:31:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:17,004 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:17,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815389523] [2020-11-29 19:31:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:17,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 19:31:17,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:17,157 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:31:17,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:31:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:17,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188629276] [2020-11-29 19:31:17,269 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:17,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815389523] [2020-11-29 19:31:17,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:17,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 19:31:17,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569884467] [2020-11-29 19:31:17,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:31:17,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:31:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:31:17,274 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand 8 states. [2020-11-29 19:31:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:17,892 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2020-11-29 19:31:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:31:17,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-11-29 19:31:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:17,895 INFO L225 Difference]: With dead ends: 180 [2020-11-29 19:31:17,895 INFO L226 Difference]: Without dead ends: 178 [2020-11-29 19:31:17,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:31:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-29 19:31:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2020-11-29 19:31:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-11-29 19:31:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2020-11-29 19:31:17,921 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 25 [2020-11-29 19:31:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:17,921 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2020-11-29 19:31:17,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:31:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2020-11-29 19:31:17,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:31:17,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:17,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:18,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:18,138 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2113141412, now seen corresponding path program 1 times [2020-11-29 19:31:18,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:18,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545953736] [2020-11-29 19:31:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:18,159 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:18,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726803135] [2020-11-29 19:31:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:18,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:31:18,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:18,261 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:31:18,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:31:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:18,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545953736] [2020-11-29 19:31:18,368 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:18,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726803135] [2020-11-29 19:31:18,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:18,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 19:31:18,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087446288] [2020-11-29 19:31:18,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:31:18,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:18,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:31:18,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:31:18,370 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand 9 states. [2020-11-29 19:31:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:18,942 INFO L93 Difference]: Finished difference Result 264 states and 322 transitions. [2020-11-29 19:31:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:31:18,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-11-29 19:31:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:18,947 INFO L225 Difference]: With dead ends: 264 [2020-11-29 19:31:18,947 INFO L226 Difference]: Without dead ends: 262 [2020-11-29 19:31:18,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:31:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-11-29 19:31:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 189. [2020-11-29 19:31:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-11-29 19:31:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 250 transitions. [2020-11-29 19:31:18,972 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 250 transitions. Word has length 27 [2020-11-29 19:31:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:18,974 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 250 transitions. [2020-11-29 19:31:18,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:31:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 250 transitions. [2020-11-29 19:31:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 19:31:18,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:18,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:19,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 19:31:19,190 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:19,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:19,191 INFO L82 PathProgramCache]: Analyzing trace with hash 790822591, now seen corresponding path program 1 times [2020-11-29 19:31:19,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:19,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647141732] [2020-11-29 19:31:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:19,199 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:19,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173164003] [2020-11-29 19:31:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:19,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:31:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 19:31:19,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647141732] [2020-11-29 19:31:19,286 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:19,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173164003] [2020-11-29 19:31:19,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:19,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:31:19,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386751008] [2020-11-29 19:31:19,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:31:19,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:31:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:31:19,288 INFO L87 Difference]: Start difference. First operand 189 states and 250 transitions. Second operand 4 states. [2020-11-29 19:31:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:19,440 INFO L93 Difference]: Finished difference Result 382 states and 527 transitions. [2020-11-29 19:31:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:31:19,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-29 19:31:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:19,445 INFO L225 Difference]: With dead ends: 382 [2020-11-29 19:31:19,445 INFO L226 Difference]: Without dead ends: 380 [2020-11-29 19:31:19,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:31:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-11-29 19:31:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 243. [2020-11-29 19:31:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-11-29 19:31:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2020-11-29 19:31:19,478 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 29 [2020-11-29 19:31:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:19,478 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2020-11-29 19:31:19,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:31:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2020-11-29 19:31:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 19:31:19,479 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:19,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:19,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 19:31:19,698 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1240831363, now seen corresponding path program 2 times [2020-11-29 19:31:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:19,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910493583] [2020-11-29 19:31:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:19,709 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:19,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890337126] [2020-11-29 19:31:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:19,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:31:19,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:31:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:31:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:19,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910493583] [2020-11-29 19:31:19,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:19,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890337126] [2020-11-29 19:31:19,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:19,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-29 19:31:19,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808441105] [2020-11-29 19:31:19,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:31:19,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:19,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:31:19,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:31:19,939 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand 10 states. [2020-11-29 19:31:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:20,054 INFO L93 Difference]: Finished difference Result 412 states and 541 transitions. [2020-11-29 19:31:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:31:20,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-11-29 19:31:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:20,057 INFO L225 Difference]: With dead ends: 412 [2020-11-29 19:31:20,057 INFO L226 Difference]: Without dead ends: 217 [2020-11-29 19:31:20,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:31:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-11-29 19:31:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-11-29 19:31:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-11-29 19:31:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 199 transitions. [2020-11-29 19:31:20,083 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 199 transitions. Word has length 30 [2020-11-29 19:31:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:20,083 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 199 transitions. [2020-11-29 19:31:20,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:31:20,084 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 199 transitions. [2020-11-29 19:31:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 19:31:20,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:20,085 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:20,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 19:31:20,302 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:20,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1752801508, now seen corresponding path program 1 times [2020-11-29 19:31:20,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:20,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668049515] [2020-11-29 19:31:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:20,313 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:20,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962925740] [2020-11-29 19:31:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:31:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:20,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668049515] [2020-11-29 19:31:20,504 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:20,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962925740] [2020-11-29 19:31:20,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:20,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 19:31:20,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137824466] [2020-11-29 19:31:20,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:31:20,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:20,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:31:20,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:31:20,506 INFO L87 Difference]: Start difference. First operand 161 states and 199 transitions. Second operand 8 states. [2020-11-29 19:31:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:20,618 INFO L93 Difference]: Finished difference Result 217 states and 271 transitions. [2020-11-29 19:31:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:31:20,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-11-29 19:31:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:20,620 INFO L225 Difference]: With dead ends: 217 [2020-11-29 19:31:20,620 INFO L226 Difference]: Without dead ends: 163 [2020-11-29 19:31:20,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:31:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-29 19:31:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-11-29 19:31:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-11-29 19:31:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2020-11-29 19:31:20,639 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 30 [2020-11-29 19:31:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:20,640 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2020-11-29 19:31:20,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:31:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2020-11-29 19:31:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 19:31:20,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:20,641 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:20,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:20,854 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:20,855 INFO L82 PathProgramCache]: Analyzing trace with hash 389368345, now seen corresponding path program 2 times [2020-11-29 19:31:20,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:20,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432442079] [2020-11-29 19:31:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:20,865 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:20,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726685618] [2020-11-29 19:31:20,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/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 [2020-11-29 19:31:20,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:31:20,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:31:20,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:31:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 19:31:20,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432442079] [2020-11-29 19:31:20,984 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:20,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726685618] [2020-11-29 19:31:20,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:31:20,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:31:20,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243380522] [2020-11-29 19:31:20,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:31:20,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:20,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:31:20,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:31:20,987 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand 5 states. [2020-11-29 19:31:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:21,181 INFO L93 Difference]: Finished difference Result 251 states and 311 transitions. [2020-11-29 19:31:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:31:21,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-29 19:31:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:21,184 INFO L225 Difference]: With dead ends: 251 [2020-11-29 19:31:21,184 INFO L226 Difference]: Without dead ends: 210 [2020-11-29 19:31:21,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:31:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-11-29 19:31:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 178. [2020-11-29 19:31:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-11-29 19:31:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 219 transitions. [2020-11-29 19:31:21,208 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 219 transitions. Word has length 31 [2020-11-29 19:31:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:21,209 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 219 transitions. [2020-11-29 19:31:21,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:31:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 219 transitions. [2020-11-29 19:31:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 19:31:21,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:21,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:21,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:21,422 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1035876869, now seen corresponding path program 1 times [2020-11-29 19:31:21,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:21,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437056215] [2020-11-29 19:31:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:21,432 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:21,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187706014] [2020-11-29 19:31:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:21,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:31:21,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:21,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437056215] [2020-11-29 19:31:21,593 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:21,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187706014] [2020-11-29 19:31:21,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:21,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 19:31:21,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448598056] [2020-11-29 19:31:21,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:31:21,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:31:21,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:31:21,597 INFO L87 Difference]: Start difference. First operand 178 states and 219 transitions. Second operand 5 states. [2020-11-29 19:31:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:21,845 INFO L93 Difference]: Finished difference Result 242 states and 301 transitions. [2020-11-29 19:31:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:31:21,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-11-29 19:31:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:21,848 INFO L225 Difference]: With dead ends: 242 [2020-11-29 19:31:21,848 INFO L226 Difference]: Without dead ends: 240 [2020-11-29 19:31:21,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:31:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-11-29 19:31:21,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 171. [2020-11-29 19:31:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-11-29 19:31:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 208 transitions. [2020-11-29 19:31:21,879 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 208 transitions. Word has length 32 [2020-11-29 19:31:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:21,879 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 208 transitions. [2020-11-29 19:31:21,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:31:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 208 transitions. [2020-11-29 19:31:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 19:31:21,880 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:21,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:22,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 19:31:22,094 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash -559947050, now seen corresponding path program 1 times [2020-11-29 19:31:22,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:22,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773534455] [2020-11-29 19:31:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:22,113 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:22,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101915283] [2020-11-29 19:31:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:31:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2020-11-29 19:31:22,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:31:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:31:22,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773534455] [2020-11-29 19:31:22,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:31:22,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101915283] [2020-11-29 19:31:22,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:31:22,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 19:31:22,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125815782] [2020-11-29 19:31:22,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:31:22,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:31:22,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:31:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:31:22,578 INFO L87 Difference]: Start difference. First operand 171 states and 208 transitions. Second operand 11 states. [2020-11-29 19:31:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:31:23,308 INFO L93 Difference]: Finished difference Result 232 states and 284 transitions. [2020-11-29 19:31:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:31:23,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-11-29 19:31:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:31:23,314 INFO L225 Difference]: With dead ends: 232 [2020-11-29 19:31:23,314 INFO L226 Difference]: Without dead ends: 226 [2020-11-29 19:31:23,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:31:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-29 19:31:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 179. [2020-11-29 19:31:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-11-29 19:31:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 216 transitions. [2020-11-29 19:31:23,344 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 216 transitions. Word has length 33 [2020-11-29 19:31:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:31:23,345 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 216 transitions. [2020-11-29 19:31:23,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:31:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 216 transitions. [2020-11-29 19:31:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 19:31:23,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:31:23,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:31:23,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 19:31:23,567 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:31:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:31:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1005324756, now seen corresponding path program 1 times [2020-11-29 19:31:23,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:31:23,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416570786] [2020-11-29 19:31:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:31:23,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:31:23,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882313192] [2020-11-29 19:31:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:31:23,685 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:31:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:31:23,729 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:31:23,779 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:31:23,779 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:31:24,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:31:24,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:31:24 BoogieIcfgContainer [2020-11-29 19:31:24,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:31:24,095 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:31:24,095 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:31:24,095 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:31:24,095 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:31:07" (3/4) ... [2020-11-29 19:31:24,097 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:31:24,188 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_379273f1-23b9-46b1-8519-5789ab76ccc5/bin/uautomizer/witness.graphml [2020-11-29 19:31:24,189 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:31:24,191 INFO L168 Benchmark]: Toolchain (without parser) took 17701.05 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 68.4 MB in the beginning and 51.3 MB in the end (delta: 17.1 MB). Peak memory consumption was 52.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:31:24,192 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 77.6 MB. Free memory is still 47.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:31:24,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.86 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 58.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:31:24,193 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.00 ms. Allocated memory is still 94.4 MB. Free memory was 58.0 MB in the beginning and 56.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:31:24,193 INFO L168 Benchmark]: Boogie Preprocessor took 45.02 ms. Allocated memory is still 94.4 MB. Free memory was 56.3 MB in the beginning and 55.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:31:24,194 INFO L168 Benchmark]: RCFGBuilder took 698.96 ms. Allocated memory is still 94.4 MB. Free memory was 55.1 MB in the beginning and 70.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:31:24,195 INFO L168 Benchmark]: TraceAbstraction took 16492.91 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 70.5 MB in the beginning and 55.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:31:24,195 INFO L168 Benchmark]: Witness Printer took 94.32 ms. Allocated memory is still 127.9 MB. Free memory was 55.4 MB in the beginning and 51.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:31:24,198 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 77.6 MB. Free memory is still 47.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.86 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 58.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.00 ms. Allocated memory is still 94.4 MB. Free memory was 58.0 MB in the beginning and 56.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.02 ms. Allocated memory is still 94.4 MB. Free memory was 56.3 MB in the beginning and 55.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 698.96 ms. Allocated memory is still 94.4 MB. Free memory was 55.1 MB in the beginning and 70.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16492.91 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 70.5 MB in the beginning and 55.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. * Witness Printer took 94.32 ms. Allocated memory is still 127.9 MB. Free memory was 55.4 MB in the beginning and 51.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=7] [L4] __assert_fail("0", "egcd3-ll.c", 4, "reach_error") VAL [counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.3s, OverallIterations: 23, TraceHistogramMax: 4, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 900 SDtfs, 2254 SDslu, 2175 SDs, 0 SdLazy, 1419 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 534 GetRequests, 369 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 22 MinimizatonAttempts, 653 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 473 ConstructedInterpolants, 0 QuantifiedInterpolants, 66346 SizeOfPredicates, 137 NumberOfNonLiveVariables, 2559 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 22 InterpolantComputations, 12 PerfectInterpolantSequences, 70/130 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...