./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa --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 376367d14f0ef5deff3321a7267050cf9f2383eb99d0a19dad6a556c0772ff28 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:35:32,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:35:32,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:35:32,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:35:32,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:35:32,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:35:32,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:35:32,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:35:32,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:35:32,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:35:32,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:35:32,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:35:32,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:35:32,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:35:32,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:35:32,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:35:32,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:35:32,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:35:32,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:35:32,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:35:32,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:35:32,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:35:32,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:35:32,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:35:32,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:35:32,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:35:32,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:35:32,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:35:32,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:35:32,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:35:32,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:35:32,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:35:32,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:35:32,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:35:32,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:35:32,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:35:32,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:35:32,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:35:32,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:35:32,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:35:32,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:35:32,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:35:32,161 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:35:32,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:35:32,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:35:32,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:35:32,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:35:32,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:35:32,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:35:32,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:35:32,164 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:35:32,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:35:32,164 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:35:32,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:35:32,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:35:32,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:35:32,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:35:32,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:35:32,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:35:32,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:35:32,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:35:32,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:35:32,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:35:32,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:35:32,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:35:32,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:35:32,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:35:32,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:35:32,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:35:32,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:35:32,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:35:32,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:35:32,168 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:35:32,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:35:32,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:35:32,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:35:32,169 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_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376367d14f0ef5deff3321a7267050cf9f2383eb99d0a19dad6a556c0772ff28 [2021-12-06 18:35:32,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:35:32,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:35:32,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:35:32,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:35:32,376 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:35:32,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2021-12-06 18:35:32,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/data/f03bac69a/5a55694deae141a4af3b554d04b59a9c/FLAGa470a3957 [2021-12-06 18:35:32,787 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:35:32,788 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2021-12-06 18:35:32,794 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/data/f03bac69a/5a55694deae141a4af3b554d04b59a9c/FLAGa470a3957 [2021-12-06 18:35:32,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/data/f03bac69a/5a55694deae141a4af3b554d04b59a9c [2021-12-06 18:35:32,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:35:32,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:35:32,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:35:32,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:35:32,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:35:32,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:35:32" (1/1) ... [2021-12-06 18:35:32,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b33101f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:32, skipping insertion in model container [2021-12-06 18:35:32,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:35:32" (1/1) ... [2021-12-06 18:35:32,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:35:32,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:35:32,953 WARN L230 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_c8d014af-fa0f-49f5-a708-96832c5bea61/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2021-12-06 18:35:32,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:35:32,979 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:35:32,988 WARN L230 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_c8d014af-fa0f-49f5-a708-96832c5bea61/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2021-12-06 18:35:33,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:35:33,009 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:35:33,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33 WrapperNode [2021-12-06 18:35:33,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:35:33,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:35:33,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:35:33,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:35:33,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,038 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-06 18:35:33,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:35:33,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:35:33,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:35:33,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:35:33,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:35:33,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:35:33,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:35:33,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:35:33,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (1/1) ... [2021-12-06 18:35:33,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:35:33,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:33,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:35:33,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:35:33,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:35:33,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:35:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:35:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:35:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 18:35:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 18:35:33,160 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:35:33,161 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:35:33,281 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:35:33,287 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:35:33,287 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:35:33,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:35:33 BoogieIcfgContainer [2021-12-06 18:35:33,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:35:33,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:35:33,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:35:33,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:35:33,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:35:32" (1/3) ... [2021-12-06 18:35:33,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae00478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:35:33, skipping insertion in model container [2021-12-06 18:35:33,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:35:33" (2/3) ... [2021-12-06 18:35:33,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae00478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:35:33, skipping insertion in model container [2021-12-06 18:35:33,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:35:33" (3/3) ... [2021-12-06 18:35:33,297 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound100.c [2021-12-06 18:35:33,302 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:35:33,302 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:35:33,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:35:33,351 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 [2021-12-06 18:35:33,351 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:35:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:35:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:35:33,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:33,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:33,368 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -797370321, now seen corresponding path program 1 times [2021-12-06 18:35:33,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:33,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744769748] [2021-12-06 18:35:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:33,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:33,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:33,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744769748] [2021-12-06 18:35:33,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744769748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:35:33,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:35:33,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:35:33,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348631854] [2021-12-06 18:35:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:35:33,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:35:33,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:35:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:35:33,512 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:33,528 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2021-12-06 18:35:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:35:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:35:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:33,538 INFO L225 Difference]: With dead ends: 57 [2021-12-06 18:35:33,538 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 18:35:33,541 INFO L932 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 [2021-12-06 18:35:33,545 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:33,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:35:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 18:35:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 18:35:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 18:35:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2021-12-06 18:35:33,579 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 10 [2021-12-06 18:35:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:33,579 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2021-12-06 18:35:33,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2021-12-06 18:35:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 18:35:33,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:33,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:33,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:35:33,580 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1698606518, now seen corresponding path program 1 times [2021-12-06 18:35:33,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:33,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122292373] [2021-12-06 18:35:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:33,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:33,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:33,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122292373] [2021-12-06 18:35:33,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122292373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:35:33,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:35:33,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:35:33,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150394419] [2021-12-06 18:35:33,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:35:33,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:35:33,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:35:33,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:35:33,637 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:33,655 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-12-06 18:35:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:35:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 18:35:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:33,657 INFO L225 Difference]: With dead ends: 47 [2021-12-06 18:35:33,657 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 18:35:33,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:35:33,659 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:33,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:35:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 18:35:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-06 18:35:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 18:35:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2021-12-06 18:35:33,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 12 [2021-12-06 18:35:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:33,667 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2021-12-06 18:35:33,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2021-12-06 18:35:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:35:33,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:33,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:33,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:35:33,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 776097594, now seen corresponding path program 1 times [2021-12-06 18:35:33,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:33,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363865367] [2021-12-06 18:35:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:33,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:33,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:35:33,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893071637] [2021-12-06 18:35:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:33,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:33,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:33,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:33,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:35:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:35:33,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:33,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:35:33,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363865367] [2021-12-06 18:35:33,809 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:35:33,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893071637] [2021-12-06 18:35:33,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893071637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:35:33,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:35:33,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:35:33,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947304650] [2021-12-06 18:35:33,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:35:33,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:35:33,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:33,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:35:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:35:33,812 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:33,838 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-12-06 18:35:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:35:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:35:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:33,840 INFO L225 Difference]: With dead ends: 41 [2021-12-06 18:35:33,840 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 18:35:33,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:35:33,842 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:33,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:35:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 18:35:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-12-06 18:35:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 18:35:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2021-12-06 18:35:33,849 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 13 [2021-12-06 18:35:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:33,849 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2021-12-06 18:35:33,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2021-12-06 18:35:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:35:33,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:33,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:33,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:35:34,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:34,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash 777587144, now seen corresponding path program 1 times [2021-12-06 18:35:34,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:34,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752043551] [2021-12-06 18:35:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:34,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:34,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752043551] [2021-12-06 18:35:34,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752043551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:35:34,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:35:34,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:35:34,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430056008] [2021-12-06 18:35:34,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:35:34,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:35:34,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:35:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:35:34,358 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:35,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:35:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:35,832 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2021-12-06 18:35:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:35:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 18:35:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:35,843 INFO L225 Difference]: With dead ends: 64 [2021-12-06 18:35:35,843 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 18:35:35,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:35:35,844 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:35,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 181 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 18:35:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 18:35:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-06 18:35:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 18:35:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2021-12-06 18:35:35,854 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2021-12-06 18:35:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:35,855 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2021-12-06 18:35:35,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2021-12-06 18:35:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:35:35,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:35,855 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:35,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:35:35,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:35,856 INFO L85 PathProgramCache]: Analyzing trace with hash 84493759, now seen corresponding path program 1 times [2021-12-06 18:35:35,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:35,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281071218] [2021-12-06 18:35:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:35,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:35,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:35:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487180900] [2021-12-06 18:35:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:35,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:35,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:35,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:35,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:35:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:35:35,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:35,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:35,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:35,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281071218] [2021-12-06 18:35:35,971 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:35:35,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487180900] [2021-12-06 18:35:35,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487180900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:35,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:35:35,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-06 18:35:35,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116089319] [2021-12-06 18:35:35,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:35,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:35:35,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:35:35,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:35:35,973 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:37,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:35:40,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:35:42,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:35:44,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:35:46,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:35:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:46,577 INFO L93 Difference]: Finished difference Result 98 states and 142 transitions. [2021-12-06 18:35:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:35:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 18:35:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:46,580 INFO L225 Difference]: With dead ends: 98 [2021-12-06 18:35:46,581 INFO L226 Difference]: Without dead ends: 79 [2021-12-06 18:35:46,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:35:46,582 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 61 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:46,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 228 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 3 Unknown, 0 Unchecked, 10.6s Time] [2021-12-06 18:35:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-06 18:35:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2021-12-06 18:35:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 18:35:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-12-06 18:35:46,597 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 15 [2021-12-06 18:35:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:46,597 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-12-06 18:35:46,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:46,597 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-12-06 18:35:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:35:46,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:46,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:46,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:35:46,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:46,800 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2016757679, now seen corresponding path program 1 times [2021-12-06 18:35:46,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:46,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787743036] [2021-12-06 18:35:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:46,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:46,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:35:46,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081259569] [2021-12-06 18:35:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:46,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:46,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:46,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:46,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:35:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:35:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:46,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:46,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:46,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787743036] [2021-12-06 18:35:46,953 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:35:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081259569] [2021-12-06 18:35:46,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081259569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:46,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:35:46,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-06 18:35:46,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826546453] [2021-12-06 18:35:46,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:46,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:35:46,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:35:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:35:46,954 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:49,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:35:51,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:35:53,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:35:56,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:35:58,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:00,747 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2021-12-06 18:36:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:36:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:36:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:00,751 INFO L225 Difference]: With dead ends: 124 [2021-12-06 18:36:00,751 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 18:36:00,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:36:00,753 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 113 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:00,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 302 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 5 Unknown, 0 Unchecked, 13.7s Time] [2021-12-06 18:36:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 18:36:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2021-12-06 18:36:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 65 states have internal predecessors, (80), 39 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 18:36:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 154 transitions. [2021-12-06 18:36:00,776 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 154 transitions. Word has length 16 [2021-12-06 18:36:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:00,776 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 154 transitions. [2021-12-06 18:36:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 154 transitions. [2021-12-06 18:36:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:36:00,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:00,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:00,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 18:36:00,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:00,978 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2015268129, now seen corresponding path program 1 times [2021-12-06 18:36:00,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:00,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44276010] [2021-12-06 18:36:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:00,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:01,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:01,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44276010] [2021-12-06 18:36:01,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44276010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:01,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110835941] [2021-12-06 18:36:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:01,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:01,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:01,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:36:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:36:01,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:01,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:01,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110835941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:01,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:01,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-06 18:36:01,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210247065] [2021-12-06 18:36:01,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:01,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:36:01,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:36:01,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:36:01,519 INFO L87 Difference]: Start difference. First operand 106 states and 154 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:04,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:09,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:10,646 INFO L93 Difference]: Finished difference Result 179 states and 261 transitions. [2021-12-06 18:36:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:36:10,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:36:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:10,649 INFO L225 Difference]: With dead ends: 179 [2021-12-06 18:36:10,649 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 18:36:10,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:36:10,650 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 55 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 122 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:10,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 420 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 244 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2021-12-06 18:36:10,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 18:36:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-12-06 18:36:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 88 states have internal predecessors, (103), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-06 18:36:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 183 transitions. [2021-12-06 18:36:10,674 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 183 transitions. Word has length 16 [2021-12-06 18:36:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:10,674 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 183 transitions. [2021-12-06 18:36:10,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 183 transitions. [2021-12-06 18:36:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 18:36:10,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:10,675 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:10,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:36:10,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:10,876 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1188910040, now seen corresponding path program 1 times [2021-12-06 18:36:10,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:10,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564441923] [2021-12-06 18:36:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:10,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:10,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:36:10,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874637484] [2021-12-06 18:36:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:10,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:10,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:10,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:36:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:10,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:36:10,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:36:11,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:36:11,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564441923] [2021-12-06 18:36:11,008 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:36:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874637484] [2021-12-06 18:36:11,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874637484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:36:11,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:36:11,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:36:11,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749451464] [2021-12-06 18:36:11,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:36:11,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:36:11,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:11,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:36:11,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:36:11,009 INFO L87 Difference]: Start difference. First operand 136 states and 183 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:36:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:11,902 INFO L93 Difference]: Finished difference Result 142 states and 187 transitions. [2021-12-06 18:36:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:36:11,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-06 18:36:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:11,903 INFO L225 Difference]: With dead ends: 142 [2021-12-06 18:36:11,903 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 18:36:11,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:36:11,904 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:11,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:36:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 18:36:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-06 18:36:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 75 states have internal predecessors, (89), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-06 18:36:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2021-12-06 18:36:11,916 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 156 transitions. Word has length 23 [2021-12-06 18:36:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:11,916 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-12-06 18:36:11,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:36:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 156 transitions. [2021-12-06 18:36:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:36:11,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:11,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:11,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:36:12,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:12,119 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash 206453113, now seen corresponding path program 1 times [2021-12-06 18:36:12,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:12,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990484249] [2021-12-06 18:36:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:12,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:12,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:36:12,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600254315] [2021-12-06 18:36:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:12,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:12,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:12,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:12,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:36:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:36:12,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:36:12,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:36:12,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990484249] [2021-12-06 18:36:12,266 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:36:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600254315] [2021-12-06 18:36:12,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600254315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:36:12,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:36:12,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:36:12,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356173583] [2021-12-06 18:36:12,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:36:12,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:36:12,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:36:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:36:12,267 INFO L87 Difference]: Start difference. First operand 114 states and 156 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:36:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:13,479 INFO L93 Difference]: Finished difference Result 164 states and 224 transitions. [2021-12-06 18:36:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:36:13,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-06 18:36:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:13,481 INFO L225 Difference]: With dead ends: 164 [2021-12-06 18:36:13,481 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 18:36:13,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:36:13,482 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:13,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 18:36:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 18:36:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-12-06 18:36:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 102 states have internal predecessors, (119), 47 states have call successors, (47), 13 states have call predecessors, (47), 13 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-06 18:36:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 208 transitions. [2021-12-06 18:36:13,494 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 208 transitions. Word has length 24 [2021-12-06 18:36:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:13,494 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 208 transitions. [2021-12-06 18:36:13,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:36:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 208 transitions. [2021-12-06 18:36:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:36:13,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:13,495 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:13,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:36:13,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:13,697 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash -158866305, now seen corresponding path program 1 times [2021-12-06 18:36:13,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704981242] [2021-12-06 18:36:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:13,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:13,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:36:13,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235970056] [2021-12-06 18:36:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:13,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:13,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:13,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:13,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:36:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:36:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:36:13,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:36:13,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:13,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704981242] [2021-12-06 18:36:13,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:36:13,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235970056] [2021-12-06 18:36:13,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235970056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:36:13,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:36:13,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:36:13,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281362776] [2021-12-06 18:36:13,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:36:13,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:36:13,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:36:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:36:13,849 INFO L87 Difference]: Start difference. First operand 156 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:36:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:14,532 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2021-12-06 18:36:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:36:14,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-06 18:36:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:14,534 INFO L225 Difference]: With dead ends: 201 [2021-12-06 18:36:14,534 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 18:36:14,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:36:14,535 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:14,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 140 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:36:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 18:36:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 188. [2021-12-06 18:36:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 111 states have (on average 1.162162162162162) internal successors, (129), 117 states have internal predecessors, (129), 57 states have call successors, (57), 19 states have call predecessors, (57), 19 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2021-12-06 18:36:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 239 transitions. [2021-12-06 18:36:14,548 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 239 transitions. Word has length 26 [2021-12-06 18:36:14,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:14,548 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 239 transitions. [2021-12-06 18:36:14,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:36:14,548 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 239 transitions. [2021-12-06 18:36:14,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:36:14,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:14,549 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:14,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:36:14,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:14,751 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2097639676, now seen corresponding path program 1 times [2021-12-06 18:36:14,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:14,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877174653] [2021-12-06 18:36:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:14,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:14,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877174653] [2021-12-06 18:36:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877174653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434950535] [2021-12-06 18:36:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:14,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:14,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:14,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:14,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:36:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:14,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:36:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:14,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:15,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434950535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:15,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:15,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-12-06 18:36:15,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240523315] [2021-12-06 18:36:15,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:15,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:36:15,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:36:15,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:36:15,034 INFO L87 Difference]: Start difference. First operand 188 states and 239 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:16,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:19,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:36:22,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:36:24,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:36:27,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:29,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:36:35,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:37,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:36:40,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:36:42,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 18:36:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:45,014 INFO L93 Difference]: Finished difference Result 549 states and 750 transitions. [2021-12-06 18:36:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:36:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 18:36:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:45,019 INFO L225 Difference]: With dead ends: 549 [2021-12-06 18:36:45,019 INFO L226 Difference]: Without dead ends: 498 [2021-12-06 18:36:45,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:36:45,021 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 275 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 113 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:45,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 338 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 233 Invalid, 6 Unknown, 0 Unchecked, 29.9s Time] [2021-12-06 18:36:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-06 18:36:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 480. [2021-12-06 18:36:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 259 states have (on average 1.2316602316602316) internal successors, (319), 277 states have internal predecessors, (319), 177 states have call successors, (177), 43 states have call predecessors, (177), 43 states have return successors, (161), 159 states have call predecessors, (161), 161 states have call successors, (161) [2021-12-06 18:36:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 657 transitions. [2021-12-06 18:36:45,064 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 657 transitions. Word has length 24 [2021-12-06 18:36:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:45,064 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 657 transitions. [2021-12-06 18:36:45,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 657 transitions. [2021-12-06 18:36:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 18:36:45,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:45,067 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:45,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:36:45,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:45,269 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1271100124, now seen corresponding path program 2 times [2021-12-06 18:36:45,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:45,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009114920] [2021-12-06 18:36:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:45,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:45,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:45,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009114920] [2021-12-06 18:36:45,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009114920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:45,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163510500] [2021-12-06 18:36:45,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:36:45,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:45,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:45,473 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:45,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:36:45,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:36:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:36:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 18:36:45,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:36:45,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163510500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:36:45,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:36:45,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 18 [2021-12-06 18:36:45,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383645071] [2021-12-06 18:36:45,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:36:45,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:36:45,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:36:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:36:45,562 INFO L87 Difference]: Start difference. First operand 480 states and 657 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:45,609 INFO L93 Difference]: Finished difference Result 528 states and 726 transitions. [2021-12-06 18:36:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:36:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 18:36:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:45,612 INFO L225 Difference]: With dead ends: 528 [2021-12-06 18:36:45,612 INFO L226 Difference]: Without dead ends: 477 [2021-12-06 18:36:45,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:36:45,613 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:45,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:36:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-12-06 18:36:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 249. [2021-12-06 18:36:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 145 states have internal predecessors, (163), 88 states have call successors, (88), 23 states have call predecessors, (88), 23 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-06 18:36:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 331 transitions. [2021-12-06 18:36:45,633 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 331 transitions. Word has length 42 [2021-12-06 18:36:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:45,633 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 331 transitions. [2021-12-06 18:36:45,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 331 transitions. [2021-12-06 18:36:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 18:36:45,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:45,635 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:45,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:36:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:36:45,836 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2047122003, now seen corresponding path program 1 times [2021-12-06 18:36:45,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:45,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692509533] [2021-12-06 18:36:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:45,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:45,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:36:45,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209942279] [2021-12-06 18:36:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:45,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:45,843 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:45,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8d014af-fa0f-49f5-a708-96832c5bea61/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process