./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX --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 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:45:35,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:45:35,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:45:35,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:45:35,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:45:35,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:45:35,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:45:35,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:45:35,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:45:35,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:45:35,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:45:35,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:45:35,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:45:35,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:45:35,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:45:35,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:45:35,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:45:35,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:45:35,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:45:35,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:45:35,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:45:35,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:45:35,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:45:35,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:45:35,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:45:35,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:45:35,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:45:35,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:45:35,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:45:35,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:45:35,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:45:35,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:45:35,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:45:35,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:45:35,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:45:35,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:45:35,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:45:35,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:45:35,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:45:35,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:45:35,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:45:35,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:45:35,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:45:35,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:45:35,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:45:35,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:45:35,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:45:35,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:45:35,952 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:45:35,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:45:35,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:45:35,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:45:35,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:45:35,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:45:35,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:45:35,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:45:35,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:45:35,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:45:35,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:45:35,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:45:35,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:45:35,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:45:35,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:45:35,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:45:35,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:45:35,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:45:35,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:45:35,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:45:35,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:45:35,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:45:35,958 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:45:35,960 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:45:35,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:45:35,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:45:35,961 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_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 [2021-11-09 09:45:36,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:45:36,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:45:36,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:45:36,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:45:36,254 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:45:36,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2021-11-09 09:45:36,323 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/data/e2a420860/ddcbe2885d2846a796963e09c94a4115/FLAG28fdae5e8 [2021-11-09 09:45:36,752 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:45:36,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2021-11-09 09:45:36,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/data/e2a420860/ddcbe2885d2846a796963e09c94a4115/FLAG28fdae5e8 [2021-11-09 09:45:37,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/data/e2a420860/ddcbe2885d2846a796963e09c94a4115 [2021-11-09 09:45:37,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:45:37,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:45:37,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:45:37,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:45:37,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:45:37,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476f4557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37, skipping insertion in model container [2021-11-09 09:45:37,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:45:37,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:45:37,376 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c[576,589] [2021-11-09 09:45:37,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:45:37,400 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:45:37,411 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c[576,589] [2021-11-09 09:45:37,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:45:37,433 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:45:37,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37 WrapperNode [2021-11-09 09:45:37,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:45:37,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:45:37,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:45:37,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:45:37,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:45:37,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:45:37,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:45:37,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:45:37,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:45:37,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:45:37,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:45:37,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:45:37,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (1/1) ... [2021-11-09 09:45:37,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:45:37,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:37,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:45:37,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:45:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:45:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:45:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:45:37,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:45:37,924 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:45:37,924 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-11-09 09:45:37,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:45:37 BoogieIcfgContainer [2021-11-09 09:45:37,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:45:37,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:45:37,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:45:37,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:45:37,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:45:37" (1/3) ... [2021-11-09 09:45:37,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f7d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:45:37, skipping insertion in model container [2021-11-09 09:45:37,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:45:37" (2/3) ... [2021-11-09 09:45:37,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f7d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:45:37, skipping insertion in model container [2021-11-09 09:45:37,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:45:37" (3/3) ... [2021-11-09 09:45:37,951 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.c [2021-11-09 09:45:37,957 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:45:37,957 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-09 09:45:38,017 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:45:38,024 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:45:38,025 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-09 09:45:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 09:45:38,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:38,062 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:38,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:38,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash 122367883, now seen corresponding path program 1 times [2021-11-09 09:45:38,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:38,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673270207] [2021-11-09 09:45:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:38,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:38,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:38,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673270207] [2021-11-09 09:45:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673270207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:38,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:38,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:45:38,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498757285] [2021-11-09 09:45:38,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:45:38,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:45:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:45:38,303 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:38,320 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2021-11-09 09:45:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:45:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-09 09:45:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:38,330 INFO L225 Difference]: With dead ends: 79 [2021-11-09 09:45:38,330 INFO L226 Difference]: Without dead ends: 37 [2021-11-09 09:45:38,332 INFO L786 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 [2021-11-09 09:45:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-09 09:45:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-09 09:45:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-09 09:45:38,381 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 8 [2021-11-09 09:45:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:38,384 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-09 09:45:38,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-09 09:45:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 09:45:38,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:38,386 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:38,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:45:38,387 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-11-09 09:45:38,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:38,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429975251] [2021-11-09 09:45:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:38,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:38,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:38,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541950008] [2021-11-09 09:45:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:38,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:38,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:38,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:45:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:45:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:38,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:38,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429975251] [2021-11-09 09:45:38,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:38,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541950008] [2021-11-09 09:45:38,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541950008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:38,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:38,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:45:38,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783260343] [2021-11-09 09:45:38,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:45:38,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:38,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:45:38,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:45:38,717 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:38,910 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-09 09:45:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:45:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-09 09:45:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:38,912 INFO L225 Difference]: With dead ends: 51 [2021-11-09 09:45:38,912 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 09:45:38,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:45:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 09:45:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-09 09:45:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-09 09:45:38,922 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 8 [2021-11-09 09:45:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:38,922 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-09 09:45:38,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-09 09:45:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 09:45:38,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:38,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:38,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:39,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:39,141 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1182906761, now seen corresponding path program 1 times [2021-11-09 09:45:39,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:39,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605285993] [2021-11-09 09:45:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:39,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:39,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:39,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938947994] [2021-11-09 09:45:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:39,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:39,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:39,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:45:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:39,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:45:39,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:39,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:39,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605285993] [2021-11-09 09:45:39,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:39,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938947994] [2021-11-09 09:45:39,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938947994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:39,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:39,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:45:39,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274038445] [2021-11-09 09:45:39,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:39,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:39,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:39,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:39,317 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:39,340 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-11-09 09:45:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:39,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-09 09:45:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:39,342 INFO L225 Difference]: With dead ends: 44 [2021-11-09 09:45:39,342 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 09:45:39,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 09:45:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-09 09:45:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-09 09:45:39,358 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 9 [2021-11-09 09:45:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:39,359 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-09 09:45:39,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-09 09:45:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:45:39,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:39,361 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:39,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:39,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:39,585 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2021-11-09 09:45:39,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:39,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328790405] [2021-11-09 09:45:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:39,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:39,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:39,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977355357] [2021-11-09 09:45:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:39,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:39,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:39,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:45:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:39,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:45:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:39,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:39,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328790405] [2021-11-09 09:45:39,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:39,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977355357] [2021-11-09 09:45:39,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977355357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:39,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:39,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:45:39,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670491985] [2021-11-09 09:45:39,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:45:39,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:45:39,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:45:39,860 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:40,038 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-11-09 09:45:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:45:40,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 09:45:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:40,040 INFO L225 Difference]: With dead ends: 74 [2021-11-09 09:45:40,040 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 09:45:40,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:45:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 09:45:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2021-11-09 09:45:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-09 09:45:40,048 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 10 [2021-11-09 09:45:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:40,048 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-09 09:45:40,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-09 09:45:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:45:40,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:40,050 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:40,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:40,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:40,251 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1896102171, now seen corresponding path program 1 times [2021-11-09 09:45:40,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:40,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147307874] [2021-11-09 09:45:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:40,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:40,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:40,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72524817] [2021-11-09 09:45:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:40,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:40,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:40,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:40,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:45:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:45:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:40,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:40,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147307874] [2021-11-09 09:45:40,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:40,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72524817] [2021-11-09 09:45:40,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72524817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:40,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:40,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:40,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691506322] [2021-11-09 09:45:40,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:40,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:40,461 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:40,551 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2021-11-09 09:45:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:45:40,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 09:45:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:40,557 INFO L225 Difference]: With dead ends: 104 [2021-11-09 09:45:40,557 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 09:45:40,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:45:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 09:45:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2021-11-09 09:45:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.338235294117647) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-11-09 09:45:40,581 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 14 [2021-11-09 09:45:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:40,582 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-11-09 09:45:40,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-11-09 09:45:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:45:40,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:40,583 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:40,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:40,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:40,798 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:40,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1527669658, now seen corresponding path program 1 times [2021-11-09 09:45:40,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:40,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123629713] [2021-11-09 09:45:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:40,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:40,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:40,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724087714] [2021-11-09 09:45:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:40,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:40,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:40,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:40,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:45:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:40,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:45:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:40,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:40,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123629713] [2021-11-09 09:45:40,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:40,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724087714] [2021-11-09 09:45:40,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724087714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:40,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:40,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:40,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105880120] [2021-11-09 09:45:40,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:45:40,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:45:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:45:40,943 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:40,973 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2021-11-09 09:45:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:45:40,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 09:45:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:40,976 INFO L225 Difference]: With dead ends: 121 [2021-11-09 09:45:40,976 INFO L226 Difference]: Without dead ends: 75 [2021-11-09 09:45:40,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:45:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-09 09:45:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-09 09:45:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-11-09 09:45:40,998 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 18 [2021-11-09 09:45:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:40,999 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-11-09 09:45:40,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-11-09 09:45:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:45:41,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:41,000 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:41,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:41,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:45:41,206 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2092681793, now seen corresponding path program 1 times [2021-11-09 09:45:41,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:41,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545182838] [2021-11-09 09:45:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:41,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:41,219 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:41,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515842502] [2021-11-09 09:45:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:41,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:41,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:41,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:45:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:45:41,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:41,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:41,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545182838] [2021-11-09 09:45:41,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:41,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515842502] [2021-11-09 09:45:41,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515842502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:41,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:41,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:45:41,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630293805] [2021-11-09 09:45:41,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:45:41,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:45:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:45:41,417 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:41,548 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2021-11-09 09:45:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:45:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 09:45:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:41,550 INFO L225 Difference]: With dead ends: 82 [2021-11-09 09:45:41,550 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 09:45:41,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:45:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 09:45:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2021-11-09 09:45:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-11-09 09:45:41,571 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 18 [2021-11-09 09:45:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:41,571 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-11-09 09:45:41,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-11-09 09:45:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:45:41,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:41,573 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:41,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:41,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:41,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1135496359, now seen corresponding path program 1 times [2021-11-09 09:45:41,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:41,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171188671] [2021-11-09 09:45:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:41,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:41,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:41,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876572730] [2021-11-09 09:45:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:41,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:41,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:41,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:41,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:45:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:45:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:41,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:41,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171188671] [2021-11-09 09:45:41,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:41,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876572730] [2021-11-09 09:45:41,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876572730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:41,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:41,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 09:45:41,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734874504] [2021-11-09 09:45:41,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:45:41,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:45:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:45:41,978 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:42,010 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-11-09 09:45:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:45:42,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 09:45:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:42,011 INFO L225 Difference]: With dead ends: 82 [2021-11-09 09:45:42,011 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 09:45:42,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:45:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 09:45:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-11-09 09:45:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-11-09 09:45:42,018 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 24 [2021-11-09 09:45:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:42,019 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-11-09 09:45:42,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-11-09 09:45:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:45:42,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:42,020 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:42,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:42,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:42,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1501746768, now seen corresponding path program 1 times [2021-11-09 09:45:42,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:42,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260871042] [2021-11-09 09:45:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:42,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:42,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:42,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375915616] [2021-11-09 09:45:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:42,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:42,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:42,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:45:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:42,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:45:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:42,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:42,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260871042] [2021-11-09 09:45:42,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:42,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375915616] [2021-11-09 09:45:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375915616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:42,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:42,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:45:42,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724347416] [2021-11-09 09:45:42,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:45:42,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:45:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:45:42,666 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:42,958 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-11-09 09:45:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:45:42,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 09:45:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:42,960 INFO L225 Difference]: With dead ends: 142 [2021-11-09 09:45:42,960 INFO L226 Difference]: Without dead ends: 136 [2021-11-09 09:45:42,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:45:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-09 09:45:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2021-11-09 09:45:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 95 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2021-11-09 09:45:42,970 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 24 [2021-11-09 09:45:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:42,970 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2021-11-09 09:45:42,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2021-11-09 09:45:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:45:42,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:42,972 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:43,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:43,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:43,197 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash 839910097, now seen corresponding path program 1 times [2021-11-09 09:45:43,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:43,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702049096] [2021-11-09 09:45:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:43,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:43,209 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:43,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672566061] [2021-11-09 09:45:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:43,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:43,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:43,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:43,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:45:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:43,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:45:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:43,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:43,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702049096] [2021-11-09 09:45:43,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:43,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672566061] [2021-11-09 09:45:43,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672566061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:43,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:43,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:45:43,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241484186] [2021-11-09 09:45:43,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:45:43,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:43,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:45:43,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:45:43,597 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:43,749 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2021-11-09 09:45:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:45:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 09:45:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:43,751 INFO L225 Difference]: With dead ends: 154 [2021-11-09 09:45:43,751 INFO L226 Difference]: Without dead ends: 146 [2021-11-09 09:45:43,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:45:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-09 09:45:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 108. [2021-11-09 09:45:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.2450980392156863) internal successors, (127), 107 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2021-11-09 09:45:43,763 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 25 [2021-11-09 09:45:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:43,763 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2021-11-09 09:45:43,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2021-11-09 09:45:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:45:43,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:43,765 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:45:43,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:43,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:43,985 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1388511663, now seen corresponding path program 1 times [2021-11-09 09:45:43,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:43,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178265456] [2021-11-09 09:45:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:43,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:43,996 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:43,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948928152] [2021-11-09 09:45:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:43,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:43,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:43,998 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:44,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:45:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:45:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:44,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:44,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178265456] [2021-11-09 09:45:44,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:44,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948928152] [2021-11-09 09:45:44,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948928152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:44,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:44,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 09:45:44,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684970486] [2021-11-09 09:45:44,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:45:44,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:45:44,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:45:44,258 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:44,296 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2021-11-09 09:45:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:45:44,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 09:45:44,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:44,298 INFO L225 Difference]: With dead ends: 166 [2021-11-09 09:45:44,298 INFO L226 Difference]: Without dead ends: 112 [2021-11-09 09:45:44,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:45:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-09 09:45:44,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-11-09 09:45:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 111 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2021-11-09 09:45:44,311 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 28 [2021-11-09 09:45:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:44,312 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2021-11-09 09:45:44,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2021-11-09 09:45:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:45:44,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:44,315 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:44,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:44,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:45:44,541 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1005744700, now seen corresponding path program 1 times [2021-11-09 09:45:44,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:44,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660188086] [2021-11-09 09:45:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:44,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:44,551 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:44,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765394981] [2021-11-09 09:45:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:44,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:44,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:44,552 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:44,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:45:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:44,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:45:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:44,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:44,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660188086] [2021-11-09 09:45:44,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:44,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765394981] [2021-11-09 09:45:44,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765394981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:44,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:44,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:45:44,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004659855] [2021-11-09 09:45:44,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:45:44,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:44,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:45:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:45:44,790 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:44,873 INFO L93 Difference]: Finished difference Result 215 states and 249 transitions. [2021-11-09 09:45:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:45:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 09:45:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:44,875 INFO L225 Difference]: With dead ends: 215 [2021-11-09 09:45:44,875 INFO L226 Difference]: Without dead ends: 125 [2021-11-09 09:45:44,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:45:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-09 09:45:44,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2021-11-09 09:45:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 99 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2021-11-09 09:45:44,886 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 33 [2021-11-09 09:45:44,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:44,887 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2021-11-09 09:45:44,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2021-11-09 09:45:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:45:44,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:44,888 INFO L513 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, 1, 1] [2021-11-09 09:45:44,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:45,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:45:45,108 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash 332875516, now seen corresponding path program 1 times [2021-11-09 09:45:45,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:45,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387192885] [2021-11-09 09:45:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:45,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:45,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:45,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283747587] [2021-11-09 09:45:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:45,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:45,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:45,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:45:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:45,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:45:45,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:45,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:45,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387192885] [2021-11-09 09:45:45,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:45,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283747587] [2021-11-09 09:45:45,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283747587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:45,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:45,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:45:45,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875160652] [2021-11-09 09:45:45,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:45:45,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:45,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:45:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:45:45,420 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:45,456 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-11-09 09:45:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:45:45,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 09:45:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:45,460 INFO L225 Difference]: With dead ends: 109 [2021-11-09 09:45:45,460 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 09:45:45,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:45:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 09:45:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-11-09 09:45:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-11-09 09:45:45,471 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 34 [2021-11-09 09:45:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:45,471 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-11-09 09:45:45,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-11-09 09:45:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:45:45,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:45,476 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:45,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:45,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:45:45,702 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:45,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1990599685, now seen corresponding path program 2 times [2021-11-09 09:45:45,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:45,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058151951] [2021-11-09 09:45:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:45,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:45,724 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:45,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020832687] [2021-11-09 09:45:45,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:45:45,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:45,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:45,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:45,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:45:45,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:45:45,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:45,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:45:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:46,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:46,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058151951] [2021-11-09 09:45:46,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:46,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020832687] [2021-11-09 09:45:46,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020832687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:46,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:46,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 09:45:46,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169725906] [2021-11-09 09:45:46,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:45:46,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:46,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:45:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:45:46,287 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:46,656 INFO L93 Difference]: Finished difference Result 188 states and 216 transitions. [2021-11-09 09:45:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:45:46,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 09:45:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:46,658 INFO L225 Difference]: With dead ends: 188 [2021-11-09 09:45:46,658 INFO L226 Difference]: Without dead ends: 182 [2021-11-09 09:45:46,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:45:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-09 09:45:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 123. [2021-11-09 09:45:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 122 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-11-09 09:45:46,673 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 34 [2021-11-09 09:45:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:46,673 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-11-09 09:45:46,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-11-09 09:45:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:45:46,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:46,675 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:46,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:46,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:45:46,901 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1728467740, now seen corresponding path program 1 times [2021-11-09 09:45:46,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:46,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824716587] [2021-11-09 09:45:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:46,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:46,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:46,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090303467] [2021-11-09 09:45:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:46,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:46,925 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:46,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:45:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:47,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:45:47,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:47,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:47,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824716587] [2021-11-09 09:45:47,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:47,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090303467] [2021-11-09 09:45:47,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090303467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:47,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:47,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:45:47,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168016202] [2021-11-09 09:45:47,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:45:47,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:47,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:45:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:45:47,624 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:47,862 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2021-11-09 09:45:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:45:47,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:45:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:47,864 INFO L225 Difference]: With dead ends: 197 [2021-11-09 09:45:47,865 INFO L226 Difference]: Without dead ends: 189 [2021-11-09 09:45:47,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:45:47,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-09 09:45:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 145. [2021-11-09 09:45:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.2302158273381294) internal successors, (171), 144 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2021-11-09 09:45:47,888 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 35 [2021-11-09 09:45:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:47,889 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2021-11-09 09:45:47,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2021-11-09 09:45:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:45:47,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:47,891 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:47,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:48,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:48,117 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1769158268, now seen corresponding path program 2 times [2021-11-09 09:45:48,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:48,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470438477] [2021-11-09 09:45:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:48,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:48,125 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:48,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818274415] [2021-11-09 09:45:48,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:45:48,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:48,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:48,131 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:48,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:45:48,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:45:48,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:48,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:45:48,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:48,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:48,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470438477] [2021-11-09 09:45:48,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:48,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818274415] [2021-11-09 09:45:48,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818274415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:48,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:48,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:45:48,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045574758] [2021-11-09 09:45:48,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:45:48,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:45:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:45:48,474 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:48,512 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2021-11-09 09:45:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:45:48,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 09:45:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:48,514 INFO L225 Difference]: With dead ends: 220 [2021-11-09 09:45:48,514 INFO L226 Difference]: Without dead ends: 149 [2021-11-09 09:45:48,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:45:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-09 09:45:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-09 09:45:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 143 states have (on average 1.2237762237762237) internal successors, (175), 148 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-11-09 09:45:48,528 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 38 [2021-11-09 09:45:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:48,528 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-11-09 09:45:48,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-11-09 09:45:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:45:48,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:48,530 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:48,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:48,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:48,745 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash -307935353, now seen corresponding path program 1 times [2021-11-09 09:45:48,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:48,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863222607] [2021-11-09 09:45:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:48,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:48,755 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:48,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852352362] [2021-11-09 09:45:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:48,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:48,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:48,762 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:48,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:45:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:45:48,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:49,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:49,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863222607] [2021-11-09 09:45:49,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:49,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852352362] [2021-11-09 09:45:49,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852352362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:49,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:49,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:45:49,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565150919] [2021-11-09 09:45:49,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:45:49,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:45:49,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:45:49,117 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:49,178 INFO L93 Difference]: Finished difference Result 232 states and 275 transitions. [2021-11-09 09:45:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:45:49,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:45:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:49,180 INFO L225 Difference]: With dead ends: 232 [2021-11-09 09:45:49,180 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 09:45:49,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:45:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 09:45:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-11-09 09:45:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.2091503267973855) internal successors, (185), 158 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 185 transitions. [2021-11-09 09:45:49,195 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 185 transitions. Word has length 43 [2021-11-09 09:45:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:49,195 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 185 transitions. [2021-11-09 09:45:49,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 185 transitions. [2021-11-09 09:45:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:45:49,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:49,196 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:49,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:49,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:45:49,420 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1736500463, now seen corresponding path program 2 times [2021-11-09 09:45:49,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:49,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129618235] [2021-11-09 09:45:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:49,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:49,442 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:49,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302896609] [2021-11-09 09:45:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:45:49,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:49,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:49,446 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:49,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:45:49,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:45:49,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:45:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:49,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:49,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129618235] [2021-11-09 09:45:49,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:49,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302896609] [2021-11-09 09:45:49,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302896609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:49,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:49,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:45:49,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713264057] [2021-11-09 09:45:49,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:45:49,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:49,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:45:49,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:45:49,814 INFO L87 Difference]: Start difference. First operand 159 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:49,869 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2021-11-09 09:45:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:45:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 09:45:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:49,872 INFO L225 Difference]: With dead ends: 166 [2021-11-09 09:45:49,872 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 09:45:49,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:45:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 09:45:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-09 09:45:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.205128205128205) internal successors, (188), 161 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-11-09 09:45:49,889 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 44 [2021-11-09 09:45:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:49,889 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-11-09 09:45:49,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-11-09 09:45:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:45:49,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:49,891 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:49,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:50,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:45:50,117 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:45:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash -78776294, now seen corresponding path program 3 times [2021-11-09 09:45:50,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:50,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368167504] [2021-11-09 09:45:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:50,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:50,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:45:50,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778775490] [2021-11-09 09:45:50,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:45:50,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:50,146 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:50,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:45:50,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:45:50,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:45:50,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 09:45:51,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:51,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368167504] [2021-11-09 09:45:51,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:45:51,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778775490] [2021-11-09 09:45:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778775490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:51,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:51,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:45:51,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601852044] [2021-11-09 09:45:51,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:45:51,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:45:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:45:51,027 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:08,916 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2021-11-09 09:46:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:46:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 09:46:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:08,917 INFO L225 Difference]: With dead ends: 188 [2021-11-09 09:46:08,917 INFO L226 Difference]: Without dead ends: 182 [2021-11-09 09:46:08,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:46:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-09 09:46:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 110. [2021-11-09 09:46:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 109 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-11-09 09:46:08,928 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 44 [2021-11-09 09:46:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:08,929 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-11-09 09:46:08,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-11-09 09:46:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:46:08,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:08,930 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:08,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:09,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:09,157 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2002321831, now seen corresponding path program 2 times [2021-11-09 09:46:09,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:09,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137595769] [2021-11-09 09:46:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:09,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:09,165 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:09,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604677144] [2021-11-09 09:46:09,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:46:09,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:09,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:09,170 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:09,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:46:09,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:46:09,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:46:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:10,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:10,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137595769] [2021-11-09 09:46:10,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:10,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604677144] [2021-11-09 09:46:10,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604677144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:10,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:10,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:46:10,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525030948] [2021-11-09 09:46:10,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:46:10,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:10,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:46:10,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:46:10,296 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:10,804 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2021-11-09 09:46:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:46:10,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:46:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:10,810 INFO L225 Difference]: With dead ends: 157 [2021-11-09 09:46:10,810 INFO L226 Difference]: Without dead ends: 149 [2021-11-09 09:46:10,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:46:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-09 09:46:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-11-09 09:46:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1504424778761062) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-11-09 09:46:10,827 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 45 [2021-11-09 09:46:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:10,827 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-11-09 09:46:10,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-11-09 09:46:10,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:46:10,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:10,828 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:10,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:11,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:11,041 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:11,042 INFO L85 PathProgramCache]: Analyzing trace with hash 762563284, now seen corresponding path program 3 times [2021-11-09 09:46:11,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:11,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413612334] [2021-11-09 09:46:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:11,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:11,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:11,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938003970] [2021-11-09 09:46:11,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:46:11,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:11,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:11,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:11,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:46:11,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:46:11,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:46:11,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 09:46:11,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:11,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413612334] [2021-11-09 09:46:11,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:11,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938003970] [2021-11-09 09:46:11,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938003970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:11,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:11,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:46:11,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130825054] [2021-11-09 09:46:11,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:46:11,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:46:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:46:11,616 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:11,847 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2021-11-09 09:46:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:46:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 09:46:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:11,849 INFO L225 Difference]: With dead ends: 161 [2021-11-09 09:46:11,849 INFO L226 Difference]: Without dead ends: 145 [2021-11-09 09:46:11,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:46:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-09 09:46:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2021-11-09 09:46:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-11-09 09:46:11,866 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 49 [2021-11-09 09:46:11,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:11,867 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-11-09 09:46:11,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-11-09 09:46:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:46:11,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:11,868 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:11,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:12,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:46:12,089 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:12,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1005346468, now seen corresponding path program 2 times [2021-11-09 09:46:12,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:12,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974180762] [2021-11-09 09:46:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:12,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:12,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:12,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210274593] [2021-11-09 09:46:12,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:46:12,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:12,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:12,100 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:12,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:46:12,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:46:12,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:12,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:46:12,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:12,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:12,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974180762] [2021-11-09 09:46:12,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:12,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210274593] [2021-11-09 09:46:12,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210274593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:12,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:12,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:46:12,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009625666] [2021-11-09 09:46:12,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:46:12,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:46:12,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:46:12,709 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:12,946 INFO L93 Difference]: Finished difference Result 241 states and 262 transitions. [2021-11-09 09:46:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:46:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:46:12,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:12,951 INFO L225 Difference]: With dead ends: 241 [2021-11-09 09:46:12,951 INFO L226 Difference]: Without dead ends: 166 [2021-11-09 09:46:12,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:46:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-09 09:46:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2021-11-09 09:46:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 129 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 146 transitions. [2021-11-09 09:46:12,972 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 146 transitions. Word has length 53 [2021-11-09 09:46:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:12,973 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 146 transitions. [2021-11-09 09:46:12,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 146 transitions. [2021-11-09 09:46:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:46:12,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:12,974 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:13,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:13,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:13,190 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1869464814, now seen corresponding path program 3 times [2021-11-09 09:46:13,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:13,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379662676] [2021-11-09 09:46:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:13,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:13,206 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:13,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063209857] [2021-11-09 09:46:13,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:46:13,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:13,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:13,208 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:13,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:46:13,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:46:13,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:13,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:46:13,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 09:46:13,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:13,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379662676] [2021-11-09 09:46:13,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:13,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063209857] [2021-11-09 09:46:13,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063209857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:13,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:13,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:46:13,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483316651] [2021-11-09 09:46:13,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:46:13,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:13,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:46:13,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:46:13,755 INFO L87 Difference]: Start difference. First operand 130 states and 146 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:13,906 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2021-11-09 09:46:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:46:13,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:46:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:13,908 INFO L225 Difference]: With dead ends: 142 [2021-11-09 09:46:13,908 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 09:46:13,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:46:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 09:46:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-11-09 09:46:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.096774193548387) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-11-09 09:46:13,924 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 53 [2021-11-09 09:46:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:13,924 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-11-09 09:46:13,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-11-09 09:46:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 09:46:13,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:13,925 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:13,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:14,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:46:14,129 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:14,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1395693798, now seen corresponding path program 4 times [2021-11-09 09:46:14,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:14,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789078983] [2021-11-09 09:46:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:14,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:14,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:14,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020344668] [2021-11-09 09:46:14,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:46:14,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:14,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:14,144 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:14,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:46:14,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:46:14,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:14,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:46:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:15,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:15,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789078983] [2021-11-09 09:46:15,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:15,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020344668] [2021-11-09 09:46:15,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020344668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:15,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:15,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 09:46:15,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552880808] [2021-11-09 09:46:15,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:46:15,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:46:15,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:46:15,281 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:15,735 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2021-11-09 09:46:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:46:15,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 09:46:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:15,737 INFO L225 Difference]: With dead ends: 170 [2021-11-09 09:46:15,737 INFO L226 Difference]: Without dead ends: 164 [2021-11-09 09:46:15,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:46:15,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-09 09:46:15,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-11-09 09:46:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.101010101010101) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-11-09 09:46:15,755 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 54 [2021-11-09 09:46:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:15,756 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-11-09 09:46:15,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-11-09 09:46:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:46:15,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:15,757 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:15,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:15,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:15,981 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:15,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash 62330478, now seen corresponding path program 3 times [2021-11-09 09:46:15,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:15,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681401495] [2021-11-09 09:46:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:15,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:15,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:15,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292465790] [2021-11-09 09:46:15,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:46:15,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:15,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:16,009 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:16,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:46:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:46:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:46:16,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 09:46:17,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:17,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681401495] [2021-11-09 09:46:17,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:17,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292465790] [2021-11-09 09:46:17,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292465790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:17,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:17,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 09:46:17,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312620908] [2021-11-09 09:46:17,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:46:17,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:46:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:46:17,684 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:28,316 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2021-11-09 09:46:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:46:28,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:46:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:28,317 INFO L225 Difference]: With dead ends: 167 [2021-11-09 09:46:28,317 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 09:46:28,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:46:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 09:46:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2021-11-09 09:46:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 104 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2021-11-09 09:46:28,343 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 58 [2021-11-09 09:46:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:28,343 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2021-11-09 09:46:28,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2021-11-09 09:46:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:46:28,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:28,345 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:28,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:28,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:28,573 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:28,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1646664921, now seen corresponding path program 4 times [2021-11-09 09:46:28,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:28,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963983617] [2021-11-09 09:46:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:28,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:28,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:28,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444309523] [2021-11-09 09:46:28,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:46:28,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:28,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:28,584 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:28,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:46:29,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:46:29,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:29,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:46:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:29,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:29,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963983617] [2021-11-09 09:46:29,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:29,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444309523] [2021-11-09 09:46:29,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444309523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:29,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:29,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 09:46:29,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716502999] [2021-11-09 09:46:29,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:46:29,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:29,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:46:29,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:46:29,930 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:30,393 INFO L93 Difference]: Finished difference Result 239 states and 267 transitions. [2021-11-09 09:46:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:46:30,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 09:46:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:30,395 INFO L225 Difference]: With dead ends: 239 [2021-11-09 09:46:30,395 INFO L226 Difference]: Without dead ends: 172 [2021-11-09 09:46:30,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:46:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-09 09:46:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2021-11-09 09:46:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.098360655737705) internal successors, (134), 123 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-11-09 09:46:30,428 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 63 [2021-11-09 09:46:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:30,429 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-11-09 09:46:30,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-11-09 09:46:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 09:46:30,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:30,431 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:30,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:30,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:46:30,648 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1319855738, now seen corresponding path program 5 times [2021-11-09 09:46:30,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:30,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040035199] [2021-11-09 09:46:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:30,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:30,661 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:30,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88126651] [2021-11-09 09:46:30,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:46:30,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:30,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:30,675 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:30,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:46:31,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:46:31,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:31,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:46:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 09:46:31,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:31,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040035199] [2021-11-09 09:46:31,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:31,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88126651] [2021-11-09 09:46:31,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88126651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:31,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:31,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:46:31,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348351072] [2021-11-09 09:46:31,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:46:31,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:46:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:46:31,340 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:31,382 INFO L93 Difference]: Finished difference Result 200 states and 217 transitions. [2021-11-09 09:46:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:46:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-09 09:46:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:31,383 INFO L225 Difference]: With dead ends: 200 [2021-11-09 09:46:31,383 INFO L226 Difference]: Without dead ends: 117 [2021-11-09 09:46:31,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:46:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-09 09:46:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-11-09 09:46:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 100 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-11-09 09:46:31,402 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 72 [2021-11-09 09:46:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:31,403 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-11-09 09:46:31,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-11-09 09:46:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 09:46:31,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:31,404 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:31,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:31,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:46:31,604 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:31,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1696816334, now seen corresponding path program 6 times [2021-11-09 09:46:31,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:31,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853235794] [2021-11-09 09:46:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:31,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:31,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:31,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731447428] [2021-11-09 09:46:31,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:46:31,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:31,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:31,616 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:31,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:46:32,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:46:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:32,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 09:46:32,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-09 09:46:32,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:32,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853235794] [2021-11-09 09:46:32,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:32,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731447428] [2021-11-09 09:46:32,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731447428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:32,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:32,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:46:32,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730630008] [2021-11-09 09:46:32,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:46:32,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:46:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:46:32,753 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:33,252 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2021-11-09 09:46:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:46:33,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-09 09:46:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:33,254 INFO L225 Difference]: With dead ends: 126 [2021-11-09 09:46:33,254 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 09:46:33,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:46:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 09:46:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-11-09 09:46:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 100 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-11-09 09:46:33,274 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 73 [2021-11-09 09:46:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:33,274 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-11-09 09:46:33,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-11-09 09:46:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 09:46:33,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:33,276 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:33,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-09 09:46:33,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:46:33,489 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1490592583, now seen corresponding path program 7 times [2021-11-09 09:46:33,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:33,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844805255] [2021-11-09 09:46:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:33,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:33,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:33,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379946839] [2021-11-09 09:46:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:46:33,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:33,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:33,516 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:33,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:46:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:46:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:34,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:34,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844805255] [2021-11-09 09:46:34,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:34,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379946839] [2021-11-09 09:46:34,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379946839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:34,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:34,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 09:46:34,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486484140] [2021-11-09 09:46:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:46:34,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:46:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:46:34,401 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:34,543 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2021-11-09 09:46:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:46:34,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-09 09:46:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:34,546 INFO L225 Difference]: With dead ends: 216 [2021-11-09 09:46:34,547 INFO L226 Difference]: Without dead ends: 204 [2021-11-09 09:46:34,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:46:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-09 09:46:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 140. [2021-11-09 09:46:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.0507246376811594) internal successors, (145), 139 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2021-11-09 09:46:34,579 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 83 [2021-11-09 09:46:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:34,579 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2021-11-09 09:46:34,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2021-11-09 09:46:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 09:46:34,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:34,581 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:34,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-09 09:46:34,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:46:34,809 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:34,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1440524652, now seen corresponding path program 5 times [2021-11-09 09:46:34,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:34,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296871642] [2021-11-09 09:46:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:34,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:34,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:34,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487772730] [2021-11-09 09:46:34,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:46:34,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:34,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:34,828 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:34,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:46:35,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:46:35,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:46:35,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:35,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296871642] [2021-11-09 09:46:35,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:35,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487772730] [2021-11-09 09:46:35,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487772730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:35,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:35,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 09:46:35,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972639556] [2021-11-09 09:46:35,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:46:35,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:46:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:46:35,832 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:35,976 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2021-11-09 09:46:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:46:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 09:46:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:35,978 INFO L225 Difference]: With dead ends: 253 [2021-11-09 09:46:35,978 INFO L226 Difference]: Without dead ends: 249 [2021-11-09 09:46:35,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:46:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-09 09:46:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 149. [2021-11-09 09:46:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.054421768707483) internal successors, (155), 148 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2021-11-09 09:46:36,017 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 89 [2021-11-09 09:46:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:36,017 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2021-11-09 09:46:36,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2021-11-09 09:46:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-09 09:46:36,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:36,022 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:36,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:36,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:36,234 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-09 09:46:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1707329916, now seen corresponding path program 3 times [2021-11-09 09:46:36,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:36,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361609150] [2021-11-09 09:46:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:36,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:36,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:46:36,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413310312] [2021-11-09 09:46:36,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:46:36,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:36,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:36,245 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:36,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:46:36,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:46:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:46:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 120 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-09 09:46:37,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:37,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361609150] [2021-11-09 09:46:37,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:46:37,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413310312] [2021-11-09 09:46:37,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413310312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:37,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:37,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:46:37,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283120188] [2021-11-09 09:46:37,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:46:37,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:37,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:46:37,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:46:37,204 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:37,360 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2021-11-09 09:46:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-09 09:46:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:37,361 INFO L225 Difference]: With dead ends: 150 [2021-11-09 09:46:37,361 INFO L226 Difference]: Without dead ends: 0 [2021-11-09 09:46:37,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:46:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-09 09:46:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-09 09:46:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-09 09:46:37,363 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2021-11-09 09:46:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:37,363 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 09:46:37,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-09 09:46:37,364 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-09 09:46:37,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:46:37,367 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:46:37,367 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:46:37,367 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:46:37,367 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:46:37,368 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:46:37,368 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:46:37,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:37,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:37,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-09 09:46:37,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:37,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:38,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:38,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:38,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:38,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:38,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:39,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:39,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:39,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 09:46:46,644 WARN L207 SmtUtils]: Spent 6.57 s on a formula simplification. DAG size of input: 169 DAG size of output: 34 [2021-11-09 09:46:57,085 WARN L207 SmtUtils]: Spent 10.44 s on a formula simplification. DAG size of input: 168 DAG size of output: 33 [2021-11-09 09:47:03,453 WARN L207 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 169 DAG size of output: 32 [2021-11-09 09:47:09,419 WARN L207 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 162 DAG size of output: 33 [2021-11-09 09:47:17,289 WARN L207 SmtUtils]: Spent 7.87 s on a formula simplification. DAG size of input: 152 DAG size of output: 44 [2021-11-09 09:47:27,571 WARN L207 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 182 DAG size of output: 31 [2021-11-09 09:47:42,922 WARN L207 SmtUtils]: Spent 15.35 s on a formula simplification. DAG size of input: 136 DAG size of output: 27 [2021-11-09 09:47:42,925 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-09 09:47:42,925 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-11-09 09:47:42,925 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-09 09:47:42,925 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-09 09:47:42,925 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-09 09:47:42,925 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-11-09 09:47:42,940 INFO L857 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2021-11-09 09:47:42,940 INFO L853 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start_main_~y~0))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~a~0 1) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))) [2021-11-09 09:47:42,941 INFO L857 garLoopResultBuilder]: For program point L37-4(lines 37 61) no Hoare annotation was computed. [2021-11-09 09:47:42,941 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-09 09:47:42,941 INFO L857 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2021-11-09 09:47:42,941 INFO L853 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (let ((.cse3 (= ULTIMATE.start_main_~a~0 1)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse4 (<= 1 ULTIMATE.start_main_~r~0)) (.cse5 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~q~0 2) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* 2 ULTIMATE.start_main_~y~0))) (< ULTIMATE.start_main_~r~0 (* 2 ULTIMATE.start_main_~b~0)) (<= ~counter~0 4) .cse3 .cse4 .cse6) (and .cse0 .cse1 .cse2 .cse4 .cse5 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-11-09 09:47:42,942 INFO L857 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2021-11-09 09:47:42,942 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-09 09:47:42,942 INFO L860 garLoopResultBuilder]: At program point L64(lines 23 65) the Hoare annotation is: true [2021-11-09 09:47:42,942 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-09 09:47:42,942 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-11-09 09:47:42,942 INFO L853 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start_main_~y~0))) (or (and (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) .cse0 (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) .cse1 (= ULTIMATE.start_main_~q~0 1)) (and .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))))) [2021-11-09 09:47:42,943 INFO L857 garLoopResultBuilder]: For program point L15-3(lines 15 18) no Hoare annotation was computed. [2021-11-09 09:47:42,943 INFO L853 garLoopResultBuilder]: At program point L15-5(lines 41 42) the Hoare annotation is: (let ((.cse1 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))) (let ((.cse2 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 .cse1))) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse5 (< (div (+ (- 1) (* ULTIMATE.start_main_~r~0 (- 1))) (- 2)) (+ ULTIMATE.start_main_~y~0 1))) (.cse7 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse3 (<= 1 ULTIMATE.start_main_~y~0)) (.cse6 (<= (div (* ULTIMATE.start_main_~b~0 (- 1)) (- 2)) ULTIMATE.start_main_~y~0))) (or (and .cse0 (= (+ ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~r~0 .cse1) (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0))) .cse2 .cse3 .cse4) (and .cse0 .cse2 .cse3 (<= 22 ~counter~0) .cse4) (and .cse0 .cse5 .cse2 .cse3 .cse4 .cse6) (and (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) .cse0 .cse7 (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) .cse3 (= ULTIMATE.start_main_~q~0 1)) (let ((.cse8 (* 4 ULTIMATE.start_main_~y~0))) (and .cse0 (< ULTIMATE.start_main_~r~0 .cse8) (= (+ ULTIMATE.start_main_~r~0 .cse8) ULTIMATE.start_main_~x~0) .cse2 .cse3 .cse4)) (let ((.cse9 (* 2 ULTIMATE.start_main_~y~0))) (and .cse0 .cse5 .cse7 (= ULTIMATE.start_main_~q~0 2) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 .cse9)) (<= ~counter~0 4) .cse3 (<= .cse9 ULTIMATE.start_main_~x~0) .cse6))))) [2021-11-09 09:47:42,943 INFO L857 garLoopResultBuilder]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2021-11-09 09:47:42,943 INFO L853 garLoopResultBuilder]: At program point L15-8(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-11-09 09:47:42,943 INFO L857 garLoopResultBuilder]: For program point L15-9(lines 15 18) no Hoare annotation was computed. [2021-11-09 09:47:42,944 INFO L853 garLoopResultBuilder]: At program point L15-11(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-11-09 09:47:42,944 INFO L857 garLoopResultBuilder]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2021-11-09 09:47:42,944 INFO L853 garLoopResultBuilder]: At program point L15-14(lines 51 52) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-11-09 09:47:42,944 INFO L857 garLoopResultBuilder]: For program point L15-15(lines 15 18) no Hoare annotation was computed. [2021-11-09 09:47:42,944 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-09 09:47:42,944 INFO L853 garLoopResultBuilder]: At program point L15-17(lines 14 20) the Hoare annotation is: (and (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~r~0))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~a~0 1) .cse2 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) (<= 1 ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))) [2021-11-09 09:47:42,944 INFO L857 garLoopResultBuilder]: For program point L15-18(lines 15 18) no Hoare annotation was computed. [2021-11-09 09:47:42,945 INFO L860 garLoopResultBuilder]: At program point L15-20(lines 14 20) the Hoare annotation is: true [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-09 09:47:42,946 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-09 09:47:42,953 INFO L731 BasicCegarLoop]: Path program histogram: [7, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:42,954 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 09:47:42,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 09:47:42 BoogieIcfgContainer [2021-11-09 09:47:42,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 09:47:42,980 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 09:47:42,980 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 09:47:42,980 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 09:47:42,981 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:45:37" (3/4) ... [2021-11-09 09:47:42,984 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-09 09:47:42,995 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-11-09 09:47:42,995 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-09 09:47:42,996 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 09:47:42,996 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 09:47:43,037 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 09:47:43,037 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 09:47:43,038 INFO L168 Benchmark]: Toolchain (without parser) took 125888.77 ms. Allocated memory was 90.2 MB in the beginning and 312.5 MB in the end (delta: 222.3 MB). Free memory was 55.7 MB in the beginning and 173.7 MB in the end (delta: -118.0 MB). Peak memory consumption was 104.2 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:43,038 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory was 63.5 MB in the beginning and 63.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:47:43,039 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.98 ms. Allocated memory is still 90.2 MB. Free memory was 55.5 MB in the beginning and 66.0 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:43,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.46 ms. Allocated memory is still 90.2 MB. Free memory was 66.0 MB in the beginning and 64.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:43,040 INFO L168 Benchmark]: Boogie Preprocessor took 24.02 ms. Allocated memory is still 90.2 MB. Free memory was 64.2 MB in the beginning and 63.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:43,040 INFO L168 Benchmark]: RCFGBuilder took 427.27 ms. Allocated memory is still 90.2 MB. Free memory was 63.0 MB in the beginning and 52.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:43,041 INFO L168 Benchmark]: TraceAbstraction took 125050.96 ms. Allocated memory was 90.2 MB in the beginning and 312.5 MB in the end (delta: 222.3 MB). Free memory was 51.6 MB in the beginning and 176.9 MB in the end (delta: -125.3 MB). Peak memory consumption was 213.3 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:43,041 INFO L168 Benchmark]: Witness Printer took 57.59 ms. Allocated memory is still 312.5 MB. Free memory was 176.9 MB in the beginning and 173.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:43,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory was 63.5 MB in the beginning and 63.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.98 ms. Allocated memory is still 90.2 MB. Free memory was 55.5 MB in the beginning and 66.0 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.46 ms. Allocated memory is still 90.2 MB. Free memory was 66.0 MB in the beginning and 64.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.02 ms. Allocated memory is still 90.2 MB. Free memory was 64.2 MB in the beginning and 63.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 427.27 ms. Allocated memory is still 90.2 MB. Free memory was 63.0 MB in the beginning and 52.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 125050.96 ms. Allocated memory was 90.2 MB in the beginning and 312.5 MB in the end (delta: 222.3 MB). Free memory was 51.6 MB in the beginning and 176.9 MB in the end (delta: -125.3 MB). Peak memory consumption was 213.3 MB. Max. memory is 16.1 GB. * Witness Printer took 57.59 ms. Allocated memory is still 312.5 MB. Free memory was 176.9 MB in the beginning and 173.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 124.9s, OverallIterations: 31, TraceHistogramMax: 7, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 33.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 65.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1035 SDtfs, 2170 SDslu, 2896 SDs, 0 SdLazy, 3015 SolverSat, 626 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 20.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1362 GetRequests, 1082 SyntacticMatches, 1 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=18, InterpolantAutomatonStates: 300, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 819 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 120 NumberOfFragments, 615 HoareAnnotationTreeSize, 10 FomulaSimplifications, 383047421 FormulaSimplificationTreeSizeReduction, 2.4s HoareSimplificationTime, 10 FomulaSimplificationsInter, 9645227 FormulaSimplificationTreeSizeReductionInter, 62.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 1273 NumberOfCodeBlocks, 1052 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 1242 ConstructedInterpolants, 0 QuantifiedInterpolants, 7103 SizeOfPredicates, 179 NumberOfNonLiveVariables, 4235 ConjunctsInSsa, 467 ConjunctsInUnsatCore, 31 InterpolantComputations, 10 PerfectInterpolantSequences, 588/1304 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 - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && a == 1) && 1 <= r) && b == y) || ((((cond == 1 && 1 == cond) && 1 <= r) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0)) && 1 <= y) && x == r + q * y - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 <= cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 <= cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((((cond == 1 && 1 <= cond) && q == 2) && x == r + 2 * y) && r < 2 * b) && counter <= 4) && a == 1) && 1 <= r) && b == y)) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: ((((((((cond == 1 && b + r + q * y == x + a * y) && 1 == cond) && 1 <= y) && x == r + q * y) || ((((cond == 1 && 1 == cond) && 1 <= y) && 22 <= counter) && x == r + q * y)) || (((((cond == 1 && (-1 + r * -1) / -2 < y + 1) && 1 == cond) && 1 <= y) && x == r + q * y) && b * -1 / -2 <= y)) || ((((((x == r + y && cond == 1) && 1 <= cond) && r < y) && b <= y) && 1 <= y) && q == 1)) || (((((cond == 1 && r < 4 * y) && r + 4 * y == x) && 1 == cond) && 1 <= y) && x == r + q * y)) || ((((((((cond == 1 && (-1 + r * -1) / -2 < y + 1) && 1 <= cond) && q == 2) && x == r + 2 * y) && counter <= 4) && 1 <= y) && 2 * y <= x) && b * -1 / -2 <= y) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((cond == 1 && 1 <= y) && a == 1) && b == y) || (((cond == 1 && 1 <= y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0)) && x == r + q * y - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((x == r + y && cond == 1) && r < y) && b <= y) && 1 <= y) && q == 1) || ((((cond == 1 && 1 == cond) && 1 <= y) && b == a * y) && x == r + q * y) RESULT: Ultimate proved your program to be correct! [2021-11-09 09:47:43,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241e9655-abe6-4e41-ae75-720670481fdf/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE