./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8 --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 64bit --witnessprinter.graph.data.programhash d1517c0d208c34ea8a2e13a0202a9dcd78985ed1edb3f8520d3b5888e2af8f79 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:00:16,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:00:16,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:00:16,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:00:16,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:00:16,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:00:16,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:00:16,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:00:16,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:00:16,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:00:16,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:00:16,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:00:16,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:00:16,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:00:16,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:00:16,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:00:16,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:00:16,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:00:16,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:00:16,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:00:16,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:00:16,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:00:16,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:00:16,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:00:16,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:00:16,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:00:16,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:00:16,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:00:16,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:00:16,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:00:16,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:00:16,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:00:16,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:00:16,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:00:16,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:00:16,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:00:16,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:00:16,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:00:16,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:00:16,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:00:16,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:00:16,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 12:00:16,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:00:16,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:00:16,149 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:00:16,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:00:16,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:00:16,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:00:16,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:00:16,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:00:16,152 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:00:16,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:00:16,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:00:16,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:00:16,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:00:16,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:00:16,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:00:16,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:00:16,153 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:00:16,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:00:16,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:00:16,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:00:16,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:00:16,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:00:16,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:00:16,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:00:16,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:00:16,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:00:16,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:00:16,156 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:00:16,156 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:00:16,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:00:16,156 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_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1517c0d208c34ea8a2e13a0202a9dcd78985ed1edb3f8520d3b5888e2af8f79 [2022-11-16 12:00:16,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:00:16,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:00:16,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:00:16,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:00:16,478 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:00:16,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-back-serstep.c [2022-11-16 12:00:16,578 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/data/d5eee5f1d/b2bafe2200604370ac1eae38edfd83bf/FLAGa50bec64a [2022-11-16 12:00:17,451 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:00:17,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-back-serstep.c [2022-11-16 12:00:17,481 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/data/d5eee5f1d/b2bafe2200604370ac1eae38edfd83bf/FLAGa50bec64a [2022-11-16 12:00:17,561 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/data/d5eee5f1d/b2bafe2200604370ac1eae38edfd83bf [2022-11-16 12:00:17,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:00:17,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:00:17,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:00:17,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:00:17,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:00:17,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:00:17" (1/1) ... [2022-11-16 12:00:17,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e2c5f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:17, skipping insertion in model container [2022-11-16 12:00:17,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:00:17" (1/1) ... [2022-11-16 12:00:17,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:00:17,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:00:18,030 WARN L229 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_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-back-serstep.c[1014,1027] [2022-11-16 12:00:18,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:00:18,729 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:00:18,740 WARN L229 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_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-back-serstep.c[1014,1027] [2022-11-16 12:00:19,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:00:19,131 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:00:19,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19 WrapperNode [2022-11-16 12:00:19,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:00:19,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:00:19,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:00:19,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:00:19,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:19,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:19,687 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 6976 [2022-11-16 12:00:19,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:00:19,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:00:19,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:00:19,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:00:19,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:19,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:19,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:19,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:19,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:19,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:20,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:20,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:20,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:00:20,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:00:20,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:00:20,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:00:20,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (1/1) ... [2022-11-16 12:00:20,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:00:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:20,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:00:20,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:00:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:00:20,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:00:21,027 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:00:21,029 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:00:32,958 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:00:32,990 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:00:32,991 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:00:32,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:00:32 BoogieIcfgContainer [2022-11-16 12:00:32,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:00:33,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:00:33,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:00:33,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:00:33,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:00:17" (1/3) ... [2022-11-16 12:00:33,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5322045c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:00:33, skipping insertion in model container [2022-11-16 12:00:33,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:19" (2/3) ... [2022-11-16 12:00:33,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5322045c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:00:33, skipping insertion in model container [2022-11-16 12:00:33,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:00:32" (3/3) ... [2022-11-16 12:00:33,011 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.gear.2.prop3-back-serstep.c [2022-11-16 12:00:33,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:00:33,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:00:33,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:00:33,146 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@a05b7c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:00:33,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:00:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 1202 states, 1200 states have (on average 1.665) internal successors, (1998), 1201 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:33,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-16 12:00:33,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:33,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:33,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1034397502, now seen corresponding path program 1 times [2022-11-16 12:00:33,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:33,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806337498] [2022-11-16 12:00:33,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:33,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:35,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806337498] [2022-11-16 12:00:35,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806337498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:35,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:35,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:00:35,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294074692] [2022-11-16 12:00:35,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:35,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:00:35,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:35,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:00:35,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:35,466 INFO L87 Difference]: Start difference. First operand has 1202 states, 1200 states have (on average 1.665) internal successors, (1998), 1201 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:35,919 INFO L93 Difference]: Finished difference Result 4027 states and 6707 transitions. [2022-11-16 12:00:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:00:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2022-11-16 12:00:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:35,956 INFO L225 Difference]: With dead ends: 4027 [2022-11-16 12:00:35,957 INFO L226 Difference]: Without dead ends: 2827 [2022-11-16 12:00:35,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:00:35,976 INFO L413 NwaCegarLoop]: 2715 mSDtfsCounter, 5952 mSDsluCounter, 3433 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5952 SdHoareTripleChecker+Valid, 6148 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:35,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5952 Valid, 6148 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:00:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2022-11-16 12:00:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 1200. [2022-11-16 12:00:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 1.6630525437864887) internal successors, (1994), 1199 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1994 transitions. [2022-11-16 12:00:36,132 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1994 transitions. Word has length 295 [2022-11-16 12:00:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:36,140 INFO L495 AbstractCegarLoop]: Abstraction has 1200 states and 1994 transitions. [2022-11-16 12:00:36,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1994 transitions. [2022-11-16 12:00:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-11-16 12:00:36,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:36,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:36,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:00:36,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:36,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1999824802, now seen corresponding path program 1 times [2022-11-16 12:00:36,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:36,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373430611] [2022-11-16 12:00:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:36,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:37,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:37,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373430611] [2022-11-16 12:00:37,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373430611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:37,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:37,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:00:37,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932536419] [2022-11-16 12:00:37,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:37,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:00:37,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:00:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:37,638 INFO L87 Difference]: Start difference. First operand 1200 states and 1994 transitions. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:38,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:38,784 INFO L93 Difference]: Finished difference Result 4781 states and 7954 transitions. [2022-11-16 12:00:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:00:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2022-11-16 12:00:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:38,800 INFO L225 Difference]: With dead ends: 4781 [2022-11-16 12:00:38,800 INFO L226 Difference]: Without dead ends: 3583 [2022-11-16 12:00:38,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:00:38,805 INFO L413 NwaCegarLoop]: 2709 mSDtfsCounter, 4942 mSDsluCounter, 3973 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4942 SdHoareTripleChecker+Valid, 6682 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:38,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4942 Valid, 6682 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:00:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2022-11-16 12:00:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 1634. [2022-11-16 12:00:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:00:38,862 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 296 [2022-11-16 12:00:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:38,863 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:00:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:00:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2022-11-16 12:00:38,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:38,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:00:38,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1030202265, now seen corresponding path program 1 times [2022-11-16 12:00:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:38,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408708427] [2022-11-16 12:00:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:38,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:39,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:39,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217127919] [2022-11-16 12:00:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:39,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:39,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:39,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:39,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:00:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:42,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 8657 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 12:00:42,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:49,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-16 12:00:51,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:51,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408708427] [2022-11-16 12:00:51,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:51,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217127919] [2022-11-16 12:00:51,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217127919] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:51,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:00:51,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-16 12:00:51,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584659548] [2022-11-16 12:00:51,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:51,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:00:51,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:00:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:51,843 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:03,089 INFO L93 Difference]: Finished difference Result 8106 states and 13261 transitions. [2022-11-16 12:01:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:01:03,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1093 [2022-11-16 12:01:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:03,114 INFO L225 Difference]: With dead ends: 8106 [2022-11-16 12:01:03,115 INFO L226 Difference]: Without dead ends: 6908 [2022-11-16 12:01:03,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2188 GetRequests, 2177 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:01:03,119 INFO L413 NwaCegarLoop]: 1983 mSDtfsCounter, 9179 mSDsluCounter, 3040 mSDsCounter, 0 mSdLazyCounter, 8424 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9179 SdHoareTripleChecker+Valid, 5023 SdHoareTripleChecker+Invalid, 9101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 8424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:03,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9179 Valid, 5023 Invalid, 9101 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [677 Valid, 8424 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-11-16 12:01:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2022-11-16 12:01:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 1637. [2022-11-16 12:01:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 1.662591687041565) internal successors, (2720), 1636 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2720 transitions. [2022-11-16 12:01:03,188 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2720 transitions. Word has length 1093 [2022-11-16 12:01:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:03,191 INFO L495 AbstractCegarLoop]: Abstraction has 1637 states and 2720 transitions. [2022-11-16 12:01:03,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2720 transitions. [2022-11-16 12:01:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2022-11-16 12:01:03,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:03,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:03,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:03,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:03,469 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:03,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1030261847, now seen corresponding path program 1 times [2022-11-16 12:01:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:03,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675728011] [2022-11-16 12:01:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:03,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:03,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:01:03,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502449808] [2022-11-16 12:01:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:03,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:03,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:03,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:03,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:01:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:07,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 8657 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 12:01:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:10,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-16 12:01:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675728011] [2022-11-16 12:01:12,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:01:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502449808] [2022-11-16 12:01:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502449808] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:12,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:01:12,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2022-11-16 12:01:12,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631669717] [2022-11-16 12:01:12,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:01:12,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:01:12,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:01:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:01:12,879 INFO L87 Difference]: Start difference. First operand 1637 states and 2720 transitions. Second operand has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:13,333 INFO L93 Difference]: Finished difference Result 5219 states and 8679 transitions. [2022-11-16 12:01:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:01:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1093 [2022-11-16 12:01:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:13,356 INFO L225 Difference]: With dead ends: 5219 [2022-11-16 12:01:13,356 INFO L226 Difference]: Without dead ends: 4018 [2022-11-16 12:01:13,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2186 GetRequests, 2179 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:01:13,364 INFO L413 NwaCegarLoop]: 2709 mSDtfsCounter, 5942 mSDsluCounter, 4684 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5942 SdHoareTripleChecker+Valid, 7393 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:13,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5942 Valid, 7393 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:01:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2022-11-16 12:01:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 1634. [2022-11-16 12:01:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:01:13,435 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1093 [2022-11-16 12:01:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:13,437 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:01:13,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:01:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2022-11-16 12:01:13,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:13,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:13,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:13,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:13,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1661068417, now seen corresponding path program 1 times [2022-11-16 12:01:13,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:13,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859177030] [2022-11-16 12:01:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:13,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:14,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:01:14,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986622282] [2022-11-16 12:01:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:14,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:14,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:14,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:01:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 8660 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:01:17,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:24,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-11-16 12:01:27,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:27,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859177030] [2022-11-16 12:01:27,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:01:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986622282] [2022-11-16 12:01:27,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986622282] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:27,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:01:27,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-16 12:01:27,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759997948] [2022-11-16 12:01:27,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:01:27,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:01:27,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:01:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:01:27,533 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 6 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:37,704 INFO L93 Difference]: Finished difference Result 6090 states and 10010 transitions. [2022-11-16 12:01:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:01:37,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1094 [2022-11-16 12:01:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:37,728 INFO L225 Difference]: With dead ends: 6090 [2022-11-16 12:01:37,728 INFO L226 Difference]: Without dead ends: 4890 [2022-11-16 12:01:37,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2194 GetRequests, 2179 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:01:37,733 INFO L413 NwaCegarLoop]: 2606 mSDtfsCounter, 7613 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 9056 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7613 SdHoareTripleChecker+Valid, 5935 SdHoareTripleChecker+Invalid, 9395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 9056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:37,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7613 Valid, 5935 Invalid, 9395 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [339 Valid, 9056 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-16 12:01:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2022-11-16 12:01:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 1640. [2022-11-16 12:01:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.6625991458206224) internal successors, (2725), 1639 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2725 transitions. [2022-11-16 12:01:37,795 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2725 transitions. Word has length 1094 [2022-11-16 12:01:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:37,797 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 2725 transitions. [2022-11-16 12:01:37,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2725 transitions. [2022-11-16 12:01:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2022-11-16 12:01:37,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:37,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:37,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:38,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:38,027 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:38,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1661127999, now seen corresponding path program 1 times [2022-11-16 12:01:38,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:38,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768529191] [2022-11-16 12:01:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:38,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:38,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:01:38,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462023430] [2022-11-16 12:01:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:38,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:38,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:38,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:38,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:01:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 8660 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 12:01:42,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:45,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-11-16 12:01:46,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768529191] [2022-11-16 12:01:46,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:01:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462023430] [2022-11-16 12:01:46,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462023430] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:46,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:01:46,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-11-16 12:01:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677691447] [2022-11-16 12:01:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:01:46,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:01:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:46,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:01:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:46,962 INFO L87 Difference]: Start difference. First operand 1640 states and 2725 transitions. Second operand has 5 states, 5 states have (on average 161.8) internal successors, (809), 5 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:47,418 INFO L93 Difference]: Finished difference Result 5236 states and 8704 transitions. [2022-11-16 12:01:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:01:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 161.8) internal successors, (809), 5 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1094 [2022-11-16 12:01:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:47,436 INFO L225 Difference]: With dead ends: 5236 [2022-11-16 12:01:47,437 INFO L226 Difference]: Without dead ends: 4030 [2022-11-16 12:01:47,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2193 GetRequests, 2181 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:01:47,440 INFO L413 NwaCegarLoop]: 2707 mSDtfsCounter, 7930 mSDsluCounter, 7390 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7930 SdHoareTripleChecker+Valid, 10097 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:47,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7930 Valid, 10097 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:01:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2022-11-16 12:01:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 1634. [2022-11-16 12:01:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:01:47,496 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1094 [2022-11-16 12:01:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:47,498 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:01:47,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.8) internal successors, (809), 5 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:01:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2022-11-16 12:01:47,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:47,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:47,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:01:47,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:47,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1553421887, now seen corresponding path program 1 times [2022-11-16 12:01:47,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:47,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266550670] [2022-11-16 12:01:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:47,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:48,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:01:48,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205861426] [2022-11-16 12:01:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:48,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:48,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:48,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:48,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:01:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 8663 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 12:01:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:57,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-16 12:02:00,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266550670] [2022-11-16 12:02:00,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:00,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205861426] [2022-11-16 12:02:00,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205861426] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:00,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:02:00,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-16 12:02:00,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934260459] [2022-11-16 12:02:00,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:00,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:02:00,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:00,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:02:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:02:00,234 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:17,569 INFO L93 Difference]: Finished difference Result 8494 states and 14008 transitions. [2022-11-16 12:02:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:02:17,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1095 [2022-11-16 12:02:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:17,595 INFO L225 Difference]: With dead ends: 8494 [2022-11-16 12:02:17,595 INFO L226 Difference]: Without dead ends: 7291 [2022-11-16 12:02:17,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2206 GetRequests, 2184 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:02:17,601 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 11592 mSDsluCounter, 6011 mSDsCounter, 0 mSdLazyCounter, 15717 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11592 SdHoareTripleChecker+Valid, 9239 SdHoareTripleChecker+Invalid, 16056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 15717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:17,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11592 Valid, 9239 Invalid, 16056 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [339 Valid, 15717 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2022-11-16 12:02:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7291 states. [2022-11-16 12:02:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7291 to 1643. [2022-11-16 12:02:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 1.6626065773447016) internal successors, (2730), 1642 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2730 transitions. [2022-11-16 12:02:17,682 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2730 transitions. Word has length 1095 [2022-11-16 12:02:17,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:17,684 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 2730 transitions. [2022-11-16 12:02:17,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2730 transitions. [2022-11-16 12:02:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2022-11-16 12:02:17,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:17,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:17,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:17,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:02:17,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1553481469, now seen corresponding path program 1 times [2022-11-16 12:02:17,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:17,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230374699] [2022-11-16 12:02:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:17,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:18,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220460863] [2022-11-16 12:02:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:18,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:18,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:18,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:18,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:02:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:21,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 8663 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:02:22,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:24,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-16 12:02:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:25,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230374699] [2022-11-16 12:02:25,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:25,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220460863] [2022-11-16 12:02:25,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220460863] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:25,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:02:25,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-11-16 12:02:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101762578] [2022-11-16 12:02:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:25,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:02:25,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:02:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:02:25,805 INFO L87 Difference]: Start difference. First operand 1643 states and 2730 transitions. Second operand has 6 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:26,318 INFO L93 Difference]: Finished difference Result 5262 states and 8746 transitions. [2022-11-16 12:02:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:02:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1095 [2022-11-16 12:02:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:26,331 INFO L225 Difference]: With dead ends: 5262 [2022-11-16 12:02:26,331 INFO L226 Difference]: Without dead ends: 4050 [2022-11-16 12:02:26,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2201 GetRequests, 2184 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:02:26,335 INFO L413 NwaCegarLoop]: 2705 mSDtfsCounter, 9927 mSDsluCounter, 10094 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9927 SdHoareTripleChecker+Valid, 12799 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:26,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9927 Valid, 12799 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:02:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2022-11-16 12:02:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 1634. [2022-11-16 12:02:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:02:26,394 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1095 [2022-11-16 12:02:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:26,396 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:02:26,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:02:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1097 [2022-11-16 12:02:26,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:26,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:26,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:26,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:26,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:26,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1836444125, now seen corresponding path program 1 times [2022-11-16 12:02:26,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:26,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413243477] [2022-11-16 12:02:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:27,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:27,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762523166] [2022-11-16 12:02:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:27,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:27,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:02:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 8666 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 12:02:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:36,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-16 12:02:38,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413243477] [2022-11-16 12:02:38,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762523166] [2022-11-16 12:02:38,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762523166] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:38,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:02:38,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2022-11-16 12:02:38,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494224718] [2022-11-16 12:02:38,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:02:38,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:02:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:02:38,987 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 8 states, 8 states have (on average 101.875) internal successors, (815), 8 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:58,113 INFO L93 Difference]: Finished difference Result 8530 states and 14068 transitions. [2022-11-16 12:02:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:02:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 101.875) internal successors, (815), 8 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1096 [2022-11-16 12:02:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:58,128 INFO L225 Difference]: With dead ends: 8530 [2022-11-16 12:02:58,129 INFO L226 Difference]: Without dead ends: 7324 [2022-11-16 12:02:58,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2216 GetRequests, 2188 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:02:58,133 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 14560 mSDsluCounter, 8239 mSDsCounter, 0 mSdLazyCounter, 20857 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14560 SdHoareTripleChecker+Valid, 11460 SdHoareTripleChecker+Invalid, 21196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 20857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:58,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14560 Valid, 11460 Invalid, 21196 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [339 Valid, 20857 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2022-11-16 12:02:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2022-11-16 12:02:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 1646. [2022-11-16 12:02:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 1.662613981762918) internal successors, (2735), 1645 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2735 transitions. [2022-11-16 12:02:58,200 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2735 transitions. Word has length 1096 [2022-11-16 12:02:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:58,201 INFO L495 AbstractCegarLoop]: Abstraction has 1646 states and 2735 transitions. [2022-11-16 12:02:58,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.875) internal successors, (815), 8 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2735 transitions. [2022-11-16 12:02:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1097 [2022-11-16 12:02:58,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:58,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:58,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:58,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:58,431 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1836503707, now seen corresponding path program 1 times [2022-11-16 12:02:58,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:58,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035735650] [2022-11-16 12:02:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:58,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:58,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478853842] [2022-11-16 12:02:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:58,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:58,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:58,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:58,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:03:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:02,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 8666 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 12:03:02,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:04,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-16 12:03:05,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:05,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035735650] [2022-11-16 12:03:05,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:03:05,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478853842] [2022-11-16 12:03:05,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478853842] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:05,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:03:05,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2022-11-16 12:03:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594568751] [2022-11-16 12:03:05,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:05,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:03:05,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:03:05,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:03:05,869 INFO L87 Difference]: Start difference. First operand 1646 states and 2735 transitions. Second operand has 7 states, 7 states have (on average 116.42857142857143) internal successors, (815), 7 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:06,431 INFO L93 Difference]: Finished difference Result 5292 states and 8796 transitions. [2022-11-16 12:03:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:03:06,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 116.42857142857143) internal successors, (815), 7 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1096 [2022-11-16 12:03:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:06,442 INFO L225 Difference]: With dead ends: 5292 [2022-11-16 12:03:06,442 INFO L226 Difference]: Without dead ends: 4074 [2022-11-16 12:03:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2209 GetRequests, 2187 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:03:06,446 INFO L413 NwaCegarLoop]: 2703 mSDtfsCounter, 11929 mSDsluCounter, 12796 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11929 SdHoareTripleChecker+Valid, 15499 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:06,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11929 Valid, 15499 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:03:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4074 states. [2022-11-16 12:03:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 1634. [2022-11-16 12:03:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:03:06,492 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1096 [2022-11-16 12:03:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:06,493 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:03:06,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.42857142857143) internal successors, (815), 7 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:03:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1098 [2022-11-16 12:03:06,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:06,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:06,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:06,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:03:06,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1524860953, now seen corresponding path program 1 times [2022-11-16 12:03:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:06,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888442958] [2022-11-16 12:03:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:06,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:07,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:03:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658708121] [2022-11-16 12:03:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:07,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:07,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:07,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:03:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:10,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 8669 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 12:03:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:15,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-16 12:03:18,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888442958] [2022-11-16 12:03:18,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:03:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658708121] [2022-11-16 12:03:18,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658708121] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:18,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:03:18,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-11-16 12:03:18,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189684017] [2022-11-16 12:03:18,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:03:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:03:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:03:18,040 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 9 states, 9 states have (on average 90.88888888888889) internal successors, (818), 9 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:43,605 INFO L93 Difference]: Finished difference Result 8566 states and 14128 transitions. [2022-11-16 12:03:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:03:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 90.88888888888889) internal successors, (818), 9 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1097 [2022-11-16 12:03:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:43,619 INFO L225 Difference]: With dead ends: 8566 [2022-11-16 12:03:43,620 INFO L226 Difference]: Without dead ends: 7357 [2022-11-16 12:03:43,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2226 GetRequests, 2192 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:03:43,624 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 18549 mSDsluCounter, 10291 mSDsCounter, 0 mSdLazyCounter, 24829 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18549 SdHoareTripleChecker+Valid, 13505 SdHoareTripleChecker+Invalid, 25168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 24829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:43,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18549 Valid, 13505 Invalid, 25168 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [339 Valid, 24829 Invalid, 0 Unknown, 0 Unchecked, 24.3s Time] [2022-11-16 12:03:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7357 states. [2022-11-16 12:03:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7357 to 1649. [2022-11-16 12:03:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 1.662621359223301) internal successors, (2740), 1648 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2740 transitions. [2022-11-16 12:03:43,678 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2740 transitions. Word has length 1097 [2022-11-16 12:03:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:43,679 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2740 transitions. [2022-11-16 12:03:43,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 90.88888888888889) internal successors, (818), 9 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2740 transitions. [2022-11-16 12:03:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1098 [2022-11-16 12:03:43,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:43,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:43,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:43,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:43,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:43,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1524801371, now seen corresponding path program 1 times [2022-11-16 12:03:43,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:43,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707427222] [2022-11-16 12:03:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:44,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:03:44,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533756309] [2022-11-16 12:03:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:44,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:44,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:44,256 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:44,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:03:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 8669 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 12:03:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:50,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-16 12:03:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707427222] [2022-11-16 12:03:52,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:03:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533756309] [2022-11-16 12:03:52,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533756309] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:52,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:03:52,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2022-11-16 12:03:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507049750] [2022-11-16 12:03:52,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:52,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:03:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:52,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:03:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:03:52,461 INFO L87 Difference]: Start difference. First operand 1649 states and 2740 transitions. Second operand has 8 states, 8 states have (on average 102.25) internal successors, (818), 8 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:53,215 INFO L93 Difference]: Finished difference Result 5322 states and 8846 transitions. [2022-11-16 12:03:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:03:53,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 102.25) internal successors, (818), 8 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1097 [2022-11-16 12:03:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:53,227 INFO L225 Difference]: With dead ends: 5322 [2022-11-16 12:03:53,227 INFO L226 Difference]: Without dead ends: 4098 [2022-11-16 12:03:53,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2217 GetRequests, 2190 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:03:53,231 INFO L413 NwaCegarLoop]: 2701 mSDtfsCounter, 13936 mSDsluCounter, 15496 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13936 SdHoareTripleChecker+Valid, 18197 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:53,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13936 Valid, 18197 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:03:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4098 states. [2022-11-16 12:03:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4098 to 1634. [2022-11-16 12:03:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:03:53,279 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1097 [2022-11-16 12:03:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:53,280 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:03:53,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.25) internal successors, (818), 8 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:03:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1099 [2022-11-16 12:03:53,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:53,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:53,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:53,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:03:53,512 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1867050953, now seen corresponding path program 1 times [2022-11-16 12:03:53,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:53,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137408324] [2022-11-16 12:03:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:53,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:53,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:03:53,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998476933] [2022-11-16 12:03:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:53,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:53,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:53,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:53,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:03:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 8672 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 12:03:58,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:03,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-11-16 12:04:05,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:05,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137408324] [2022-11-16 12:04:05,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:04:05,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998476933] [2022-11-16 12:04:05,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998476933] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:05,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:04:05,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2022-11-16 12:04:05,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490384717] [2022-11-16 12:04:05,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:05,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:04:05,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:05,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:04:05,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:04:05,769 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 10 states, 10 states have (on average 82.1) internal successors, (821), 10 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:31,786 INFO L93 Difference]: Finished difference Result 8602 states and 14188 transitions. [2022-11-16 12:04:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:04:31,787 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 82.1) internal successors, (821), 10 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1098 [2022-11-16 12:04:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:31,798 INFO L225 Difference]: With dead ends: 8602 [2022-11-16 12:04:31,799 INFO L226 Difference]: Without dead ends: 7390 [2022-11-16 12:04:31,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2236 GetRequests, 2196 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:04:31,802 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 22543 mSDsluCounter, 12341 mSDsCounter, 0 mSdLazyCounter, 28803 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22543 SdHoareTripleChecker+Valid, 15548 SdHoareTripleChecker+Invalid, 29142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 28803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:31,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22543 Valid, 15548 Invalid, 29142 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [339 Valid, 28803 Invalid, 0 Unknown, 0 Unchecked, 24.6s Time] [2022-11-16 12:04:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2022-11-16 12:04:31,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 1652. [2022-11-16 12:04:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 1.6626287098728043) internal successors, (2745), 1651 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2745 transitions. [2022-11-16 12:04:31,855 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2745 transitions. Word has length 1098 [2022-11-16 12:04:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:31,857 INFO L495 AbstractCegarLoop]: Abstraction has 1652 states and 2745 transitions. [2022-11-16 12:04:31,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 82.1) internal successors, (821), 10 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2745 transitions. [2022-11-16 12:04:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1099 [2022-11-16 12:04:31,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:31,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:31,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:32,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:04:32,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:32,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1866991371, now seen corresponding path program 1 times [2022-11-16 12:04:32,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:32,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476817538] [2022-11-16 12:04:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:32,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:32,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:04:32,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736592762] [2022-11-16 12:04:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:32,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:32,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:32,467 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:32,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:04:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 8672 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 12:04:36,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:38,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-11-16 12:04:40,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476817538] [2022-11-16 12:04:40,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:04:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736592762] [2022-11-16 12:04:40,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736592762] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:40,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:04:40,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-16 12:04:40,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306097080] [2022-11-16 12:04:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:40,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:04:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:04:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:04:40,462 INFO L87 Difference]: Start difference. First operand 1652 states and 2745 transitions. Second operand has 9 states, 9 states have (on average 91.22222222222223) internal successors, (821), 9 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:41,464 INFO L93 Difference]: Finished difference Result 5352 states and 8896 transitions. [2022-11-16 12:04:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:04:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 91.22222222222223) internal successors, (821), 9 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1098 [2022-11-16 12:04:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:41,476 INFO L225 Difference]: With dead ends: 5352 [2022-11-16 12:04:41,476 INFO L226 Difference]: Without dead ends: 4122 [2022-11-16 12:04:41,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2225 GetRequests, 2193 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:04:41,480 INFO L413 NwaCegarLoop]: 2699 mSDtfsCounter, 15948 mSDsluCounter, 18194 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15948 SdHoareTripleChecker+Valid, 20893 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:41,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15948 Valid, 20893 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:04:41,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2022-11-16 12:04:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 1634. [2022-11-16 12:04:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:04:41,526 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1098 [2022-11-16 12:04:41,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:41,527 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:04:41,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 91.22222222222223) internal successors, (821), 9 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:04:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2022-11-16 12:04:41,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:41,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:41,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:41,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:04:41,771 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash -845820275, now seen corresponding path program 1 times [2022-11-16 12:04:41,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:41,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317275924] [2022-11-16 12:04:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:41,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:42,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:04:42,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272358463] [2022-11-16 12:04:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:42,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:42,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:42,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:42,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:04:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:46,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 8675 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 12:04:46,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:52,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-16 12:04:55,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:55,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317275924] [2022-11-16 12:04:55,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:04:55,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272358463] [2022-11-16 12:04:55,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272358463] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:55,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:04:55,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2022-11-16 12:04:55,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636038265] [2022-11-16 12:04:55,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:55,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:04:55,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:55,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:04:55,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:04:55,645 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 11 states, 11 states have (on average 74.9090909090909) internal successors, (824), 11 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:28,281 INFO L93 Difference]: Finished difference Result 8638 states and 14248 transitions. [2022-11-16 12:05:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:05:28,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 74.9090909090909) internal successors, (824), 11 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1099 [2022-11-16 12:05:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:28,291 INFO L225 Difference]: With dead ends: 8638 [2022-11-16 12:05:28,291 INFO L226 Difference]: Without dead ends: 7423 [2022-11-16 12:05:28,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2246 GetRequests, 2200 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 12:05:28,296 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 26542 mSDsluCounter, 14389 mSDsCounter, 0 mSdLazyCounter, 32779 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26542 SdHoareTripleChecker+Valid, 17589 SdHoareTripleChecker+Invalid, 33118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 32779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:28,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26542 Valid, 17589 Invalid, 33118 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [339 Valid, 32779 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2022-11-16 12:05:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7423 states. [2022-11-16 12:05:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7423 to 1655. [2022-11-16 12:05:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 1.6626360338573156) internal successors, (2750), 1654 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2750 transitions. [2022-11-16 12:05:28,356 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2750 transitions. Word has length 1099 [2022-11-16 12:05:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:28,358 INFO L495 AbstractCegarLoop]: Abstraction has 1655 states and 2750 transitions. [2022-11-16 12:05:28,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.9090909090909) internal successors, (824), 11 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2750 transitions. [2022-11-16 12:05:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2022-11-16 12:05:28,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:28,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:28,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:28,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:28,598 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash -845760693, now seen corresponding path program 1 times [2022-11-16 12:05:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:28,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161309760] [2022-11-16 12:05:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:28,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:28,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:05:28,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734732499] [2022-11-16 12:05:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:28,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:28,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:28,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:05:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 8675 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 12:05:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:35,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-16 12:05:37,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:37,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161309760] [2022-11-16 12:05:37,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:05:37,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734732499] [2022-11-16 12:05:37,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734732499] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:37,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:05:37,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2022-11-16 12:05:37,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830074899] [2022-11-16 12:05:37,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:37,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:05:37,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:37,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:05:37,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:05:37,869 INFO L87 Difference]: Start difference. First operand 1655 states and 2750 transitions. Second operand has 10 states, 10 states have (on average 82.4) internal successors, (824), 10 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:38,975 INFO L93 Difference]: Finished difference Result 5382 states and 8946 transitions. [2022-11-16 12:05:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:05:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 82.4) internal successors, (824), 10 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1099 [2022-11-16 12:05:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:38,982 INFO L225 Difference]: With dead ends: 5382 [2022-11-16 12:05:38,982 INFO L226 Difference]: Without dead ends: 4146 [2022-11-16 12:05:38,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2233 GetRequests, 2196 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 12:05:38,986 INFO L413 NwaCegarLoop]: 2697 mSDtfsCounter, 17965 mSDsluCounter, 20890 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17965 SdHoareTripleChecker+Valid, 23587 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:38,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17965 Valid, 23587 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:05:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2022-11-16 12:05:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 1634. [2022-11-16 12:05:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:05:39,036 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1099 [2022-11-16 12:05:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:39,037 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:05:39,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 82.4) internal successors, (824), 10 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:05:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1101 [2022-11-16 12:05:39,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:39,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:39,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:39,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:39,279 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash -924770669, now seen corresponding path program 1 times [2022-11-16 12:05:39,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279176399] [2022-11-16 12:05:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:39,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:39,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:05:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477126984] [2022-11-16 12:05:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:39,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:39,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:39,773 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:39,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:05:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 8678 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 12:05:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:50,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-16 12:05:53,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:53,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279176399] [2022-11-16 12:05:53,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:05:53,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477126984] [2022-11-16 12:05:53,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477126984] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:53,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:05:53,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2022-11-16 12:05:53,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353866845] [2022-11-16 12:05:53,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:53,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:05:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:05:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:05:53,171 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 12 states, 12 states have (on average 68.91666666666667) internal successors, (827), 12 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:25,350 INFO L93 Difference]: Finished difference Result 8674 states and 14308 transitions. [2022-11-16 12:06:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:06:25,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 68.91666666666667) internal successors, (827), 12 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1100 [2022-11-16 12:06:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:25,358 INFO L225 Difference]: With dead ends: 8674 [2022-11-16 12:06:25,358 INFO L226 Difference]: Without dead ends: 7456 [2022-11-16 12:06:25,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2256 GetRequests, 2204 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=457, Invalid=2405, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 12:06:25,361 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 30546 mSDsluCounter, 16435 mSDsCounter, 0 mSdLazyCounter, 36757 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30546 SdHoareTripleChecker+Valid, 19628 SdHoareTripleChecker+Invalid, 37096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 36757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:25,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30546 Valid, 19628 Invalid, 37096 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [339 Valid, 36757 Invalid, 0 Unknown, 0 Unchecked, 30.2s Time] [2022-11-16 12:06:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-11-16 12:06:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 1658. [2022-11-16 12:06:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.6626433313216658) internal successors, (2755), 1657 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2755 transitions. [2022-11-16 12:06:25,422 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2755 transitions. Word has length 1100 [2022-11-16 12:06:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:25,423 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2755 transitions. [2022-11-16 12:06:25,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 68.91666666666667) internal successors, (827), 12 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2755 transitions. [2022-11-16 12:06:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1101 [2022-11-16 12:06:25,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:25,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:25,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:25,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:06:25,667 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:25,667 INFO L85 PathProgramCache]: Analyzing trace with hash -924711087, now seen corresponding path program 1 times [2022-11-16 12:06:25,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:25,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887756427] [2022-11-16 12:06:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:25,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:26,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:06:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561358033] [2022-11-16 12:06:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:26,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:26,080 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:26,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:06:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 8678 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 12:06:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:33,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-16 12:06:35,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:35,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887756427] [2022-11-16 12:06:35,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:06:35,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561358033] [2022-11-16 12:06:35,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561358033] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:35,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:06:35,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2022-11-16 12:06:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546168620] [2022-11-16 12:06:35,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:35,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:06:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:06:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:06:35,339 INFO L87 Difference]: Start difference. First operand 1658 states and 2755 transitions. Second operand has 11 states, 11 states have (on average 75.18181818181819) internal successors, (827), 11 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:36,698 INFO L93 Difference]: Finished difference Result 5412 states and 8996 transitions. [2022-11-16 12:06:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:06:36,699 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 75.18181818181819) internal successors, (827), 11 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1100 [2022-11-16 12:06:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:36,704 INFO L225 Difference]: With dead ends: 5412 [2022-11-16 12:06:36,704 INFO L226 Difference]: Without dead ends: 4170 [2022-11-16 12:06:36,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2241 GetRequests, 2199 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:06:36,707 INFO L413 NwaCegarLoop]: 2695 mSDtfsCounter, 19987 mSDsluCounter, 23584 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19987 SdHoareTripleChecker+Valid, 26279 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:36,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19987 Valid, 26279 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:06:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2022-11-16 12:06:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 1634. [2022-11-16 12:06:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:06:36,755 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1100 [2022-11-16 12:06:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:36,756 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:06:36,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.18181818181819) internal successors, (827), 11 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:06:36,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2022-11-16 12:06:36,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:36,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:36,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:37,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:06:37,047 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1697324747, now seen corresponding path program 1 times [2022-11-16 12:06:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:37,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911524869] [2022-11-16 12:06:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:37,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:37,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:06:37,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735253215] [2022-11-16 12:06:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:37,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:37,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:37,422 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:37,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:06:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 8681 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 12:06:42,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:47,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-11-16 12:06:51,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:51,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911524869] [2022-11-16 12:06:51,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:06:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735253215] [2022-11-16 12:06:51,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735253215] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:51,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:06:51,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2022-11-16 12:06:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143040245] [2022-11-16 12:06:51,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:51,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:06:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:51,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:06:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:06:51,176 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 13 states, 13 states have (on average 63.84615384615385) internal successors, (830), 13 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:26,445 INFO L93 Difference]: Finished difference Result 8710 states and 14368 transitions. [2022-11-16 12:07:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:07:26,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 63.84615384615385) internal successors, (830), 13 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1101 [2022-11-16 12:07:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:26,453 INFO L225 Difference]: With dead ends: 8710 [2022-11-16 12:07:26,454 INFO L226 Difference]: Without dead ends: 7489 [2022-11-16 12:07:26,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2266 GetRequests, 2208 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=557, Invalid=2983, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 12:07:26,458 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 35571 mSDsluCounter, 18299 mSDsCounter, 0 mSdLazyCounter, 39525 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35571 SdHoareTripleChecker+Valid, 21485 SdHoareTripleChecker+Invalid, 39864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 39525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:26,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35571 Valid, 21485 Invalid, 39864 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [339 Valid, 39525 Invalid, 0 Unknown, 0 Unchecked, 32.8s Time] [2022-11-16 12:07:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7489 states. [2022-11-16 12:07:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7489 to 1661. [2022-11-16 12:07:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 1.6626506024096386) internal successors, (2760), 1660 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2760 transitions. [2022-11-16 12:07:26,514 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2760 transitions. Word has length 1101 [2022-11-16 12:07:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:26,515 INFO L495 AbstractCegarLoop]: Abstraction has 1661 states and 2760 transitions. [2022-11-16 12:07:26,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 63.84615384615385) internal successors, (830), 13 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2760 transitions. [2022-11-16 12:07:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2022-11-16 12:07:26,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:26,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:26,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:26,747 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:26,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1697265165, now seen corresponding path program 1 times [2022-11-16 12:07:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:26,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093365012] [2022-11-16 12:07:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:27,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:07:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091212398] [2022-11-16 12:07:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:27,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:27,091 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:27,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:07:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 8681 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 12:07:31,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:34,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-11-16 12:07:36,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:36,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093365012] [2022-11-16 12:07:36,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:07:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091212398] [2022-11-16 12:07:36,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091212398] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:36,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:07:36,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 24 [2022-11-16 12:07:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712241748] [2022-11-16 12:07:36,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:36,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:07:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:07:36,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:07:36,808 INFO L87 Difference]: Start difference. First operand 1661 states and 2760 transitions. Second operand has 12 states, 12 states have (on average 69.16666666666667) internal successors, (830), 12 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:38,313 INFO L93 Difference]: Finished difference Result 5442 states and 9046 transitions. [2022-11-16 12:07:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:07:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 69.16666666666667) internal successors, (830), 12 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1101 [2022-11-16 12:07:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:38,319 INFO L225 Difference]: With dead ends: 5442 [2022-11-16 12:07:38,319 INFO L226 Difference]: Without dead ends: 4194 [2022-11-16 12:07:38,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2249 GetRequests, 2202 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:07:38,322 INFO L413 NwaCegarLoop]: 2693 mSDtfsCounter, 22014 mSDsluCounter, 26276 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22014 SdHoareTripleChecker+Valid, 28969 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:38,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22014 Valid, 28969 Invalid, 153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:07:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2022-11-16 12:07:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 1634. [2022-11-16 12:07:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:07:38,366 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1101 [2022-11-16 12:07:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:38,367 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:07:38,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.16666666666667) internal successors, (830), 12 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:07:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1103 [2022-11-16 12:07:38,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:38,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:38,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:38,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:38,611 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:38,611 INFO L85 PathProgramCache]: Analyzing trace with hash -232259347, now seen corresponding path program 1 times [2022-11-16 12:07:38,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:38,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164016469] [2022-11-16 12:07:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:38,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:07:38,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601460203] [2022-11-16 12:07:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:38,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:38,955 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:38,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:07:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 8684 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 12:07:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:49,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-11-16 12:07:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:52,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164016469] [2022-11-16 12:07:52,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:07:52,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601460203] [2022-11-16 12:07:52,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601460203] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:52,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:07:52,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 29 [2022-11-16 12:07:52,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646952680] [2022-11-16 12:07:52,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:52,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:07:52,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:52,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:07:52,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:07:52,708 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 14 states, 14 states have (on average 59.5) internal successors, (833), 14 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:32,276 INFO L93 Difference]: Finished difference Result 8746 states and 14428 transitions. [2022-11-16 12:08:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:08:32,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 59.5) internal successors, (833), 14 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1102 [2022-11-16 12:08:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:32,284 INFO L225 Difference]: With dead ends: 8746 [2022-11-16 12:08:32,284 INFO L226 Difference]: Without dead ends: 7522 [2022-11-16 12:08:32,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2276 GetRequests, 2212 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=667, Invalid=3623, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 12:08:32,288 INFO L413 NwaCegarLoop]: 3179 mSDtfsCounter, 38569 mSDsluCounter, 20521 mSDsCounter, 0 mSdLazyCounter, 44719 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38569 SdHoareTripleChecker+Valid, 23700 SdHoareTripleChecker+Invalid, 45058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 44719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:32,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38569 Valid, 23700 Invalid, 45058 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [339 Valid, 44719 Invalid, 0 Unknown, 0 Unchecked, 36.7s Time] [2022-11-16 12:08:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7522 states. [2022-11-16 12:08:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7522 to 1664. [2022-11-16 12:08:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 1.6626578472639808) internal successors, (2765), 1663 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2765 transitions. [2022-11-16 12:08:32,327 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2765 transitions. Word has length 1102 [2022-11-16 12:08:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:32,328 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 2765 transitions. [2022-11-16 12:08:32,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 59.5) internal successors, (833), 14 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2765 transitions. [2022-11-16 12:08:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1103 [2022-11-16 12:08:32,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:32,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:32,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:32,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:08:32,555 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:32,555 INFO L85 PathProgramCache]: Analyzing trace with hash -232199765, now seen corresponding path program 1 times [2022-11-16 12:08:32,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:32,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596726926] [2022-11-16 12:08:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:32,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:32,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:08:32,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614264054] [2022-11-16 12:08:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:32,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:32,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:32,899 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:32,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:08:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:37,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 8684 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 12:08:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:40,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-11-16 12:08:42,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596726926] [2022-11-16 12:08:42,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:08:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614264054] [2022-11-16 12:08:42,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614264054] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:42,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:42,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2022-11-16 12:08:42,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690258092] [2022-11-16 12:08:42,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:42,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:08:42,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:42,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:08:42,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:08:42,768 INFO L87 Difference]: Start difference. First operand 1664 states and 2765 transitions. Second operand has 13 states, 13 states have (on average 64.07692307692308) internal successors, (833), 13 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:44,536 INFO L93 Difference]: Finished difference Result 5472 states and 9096 transitions. [2022-11-16 12:08:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:08:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 64.07692307692308) internal successors, (833), 13 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1102 [2022-11-16 12:08:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:44,543 INFO L225 Difference]: With dead ends: 5472 [2022-11-16 12:08:44,543 INFO L226 Difference]: Without dead ends: 4218 [2022-11-16 12:08:44,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2257 GetRequests, 2205 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 12:08:44,546 INFO L413 NwaCegarLoop]: 2691 mSDtfsCounter, 24046 mSDsluCounter, 28966 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24046 SdHoareTripleChecker+Valid, 31657 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:44,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24046 Valid, 31657 Invalid, 178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:08:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2022-11-16 12:08:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 1634. [2022-11-16 12:08:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:08:44,580 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1102 [2022-11-16 12:08:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:44,581 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:08:44,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 64.07692307692308) internal successors, (833), 13 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:08:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1104 [2022-11-16 12:08:44,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:44,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:44,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:44,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 12:08:44,819 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1078156251, now seen corresponding path program 1 times [2022-11-16 12:08:44,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:44,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896711651] [2022-11-16 12:08:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:45,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:08:45,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657551459] [2022-11-16 12:08:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:45,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:45,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:45,154 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:45,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:08:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:50,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 8687 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-16 12:08:50,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:55,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-16 12:08:58,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896711651] [2022-11-16 12:08:58,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:08:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657551459] [2022-11-16 12:08:58,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657551459] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:58,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:58,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [18] total 31 [2022-11-16 12:08:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097632945] [2022-11-16 12:08:58,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:58,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:08:58,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:08:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:08:58,492 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 15 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:37,678 INFO L93 Difference]: Finished difference Result 8782 states and 14488 transitions. [2022-11-16 12:09:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:09:37,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1103 [2022-11-16 12:09:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:37,684 INFO L225 Difference]: With dead ends: 8782 [2022-11-16 12:09:37,684 INFO L226 Difference]: Without dead ends: 7555 [2022-11-16 12:09:37,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2286 GetRequests, 2216 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=787, Invalid=4325, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 12:09:37,688 INFO L413 NwaCegarLoop]: 3172 mSDtfsCounter, 43604 mSDsluCounter, 22379 mSDsCounter, 0 mSdLazyCounter, 47477 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43604 SdHoareTripleChecker+Valid, 25551 SdHoareTripleChecker+Invalid, 47816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 47477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:37,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43604 Valid, 25551 Invalid, 47816 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [339 Valid, 47477 Invalid, 0 Unknown, 0 Unchecked, 36.1s Time] [2022-11-16 12:09:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7555 states. [2022-11-16 12:09:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7555 to 1667. [2022-11-16 12:09:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 1.6626650660264106) internal successors, (2770), 1666 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2770 transitions. [2022-11-16 12:09:37,728 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2770 transitions. Word has length 1103 [2022-11-16 12:09:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:37,729 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 2770 transitions. [2022-11-16 12:09:37,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2770 transitions. [2022-11-16 12:09:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1104 [2022-11-16 12:09:37,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:37,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:37,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 12:09:37,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:37,947 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:37,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1078215833, now seen corresponding path program 1 times [2022-11-16 12:09:37,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653197800] [2022-11-16 12:09:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:38,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:38,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053109540] [2022-11-16 12:09:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:38,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:38,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:38,251 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:38,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:09:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 8687 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 12:09:43,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:45,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-16 12:09:47,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:47,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653197800] [2022-11-16 12:09:47,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:09:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053109540] [2022-11-16 12:09:47,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053109540] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:47,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:09:47,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 28 [2022-11-16 12:09:47,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607714748] [2022-11-16 12:09:47,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:47,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:09:47,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:09:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:09:47,964 INFO L87 Difference]: Start difference. First operand 1667 states and 2770 transitions. Second operand has 14 states, 14 states have (on average 59.714285714285715) internal successors, (836), 14 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:49,931 INFO L93 Difference]: Finished difference Result 5502 states and 9146 transitions. [2022-11-16 12:09:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:09:49,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 59.714285714285715) internal successors, (836), 14 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1103 [2022-11-16 12:09:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:49,936 INFO L225 Difference]: With dead ends: 5502 [2022-11-16 12:09:49,936 INFO L226 Difference]: Without dead ends: 4242 [2022-11-16 12:09:49,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2265 GetRequests, 2208 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=544, Invalid=2878, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 12:09:49,942 INFO L413 NwaCegarLoop]: 2689 mSDtfsCounter, 26083 mSDsluCounter, 31654 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26083 SdHoareTripleChecker+Valid, 34343 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:49,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26083 Valid, 34343 Invalid, 205 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:09:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2022-11-16 12:09:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 1634. [2022-11-16 12:09:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:09:49,970 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1103 [2022-11-16 12:09:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:49,971 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:09:49,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 59.714285714285715) internal successors, (836), 14 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:09:49,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2022-11-16 12:09:49,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:49,983 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:50,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:50,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:50,199 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash 158406729, now seen corresponding path program 1 times [2022-11-16 12:09:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:50,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801824361] [2022-11-16 12:09:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:50,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:50,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030799201] [2022-11-16 12:09:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:50,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:50,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:50,515 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:50,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:09:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:55,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 8690 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-16 12:09:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:00,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-16 12:10:03,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:03,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801824361] [2022-11-16 12:10:03,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:10:03,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030799201] [2022-11-16 12:10:03,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030799201] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:10:03,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:10:03,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [19] total 33 [2022-11-16 12:10:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888348147] [2022-11-16 12:10:03,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:03,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:10:03,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:03,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:10:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:10:03,416 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 16 states, 16 states have (on average 52.4375) internal successors, (839), 16 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:44,599 INFO L93 Difference]: Finished difference Result 8818 states and 14548 transitions. [2022-11-16 12:10:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 12:10:44,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 52.4375) internal successors, (839), 16 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1104 [2022-11-16 12:10:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:44,605 INFO L225 Difference]: With dead ends: 8818 [2022-11-16 12:10:44,605 INFO L226 Difference]: Without dead ends: 7588 [2022-11-16 12:10:44,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2296 GetRequests, 2220 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=917, Invalid=5089, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 12:10:44,609 INFO L413 NwaCegarLoop]: 3165 mSDtfsCounter, 47628 mSDsluCounter, 24416 mSDsCounter, 0 mSdLazyCounter, 51456 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47628 SdHoareTripleChecker+Valid, 27581 SdHoareTripleChecker+Invalid, 51795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 51456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:44,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47628 Valid, 27581 Invalid, 51795 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [339 Valid, 51456 Invalid, 0 Unknown, 0 Unchecked, 37.7s Time] [2022-11-16 12:10:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2022-11-16 12:10:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 1670. [2022-11-16 12:10:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 1.6626722588376273) internal successors, (2775), 1669 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2775 transitions. [2022-11-16 12:10:44,640 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2775 transitions. Word has length 1104 [2022-11-16 12:10:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:44,641 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2775 transitions. [2022-11-16 12:10:44,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.4375) internal successors, (839), 16 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2775 transitions. [2022-11-16 12:10:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2022-11-16 12:10:44,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:44,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:44,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-16 12:10:44,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:10:44,879 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 158466311, now seen corresponding path program 1 times [2022-11-16 12:10:44,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:44,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974553128] [2022-11-16 12:10:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:45,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:10:45,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804398362] [2022-11-16 12:10:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:45,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:10:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:10:45,183 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:10:45,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:10:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 8690 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-16 12:10:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:52,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-16 12:10:54,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:54,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974553128] [2022-11-16 12:10:54,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:10:54,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804398362] [2022-11-16 12:10:54,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804398362] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:10:54,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:10:54,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [18] total 30 [2022-11-16 12:10:54,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675063457] [2022-11-16 12:10:54,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:54,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:10:54,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:10:54,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:10:54,709 INFO L87 Difference]: Start difference. First operand 1670 states and 2775 transitions. Second operand has 15 states, 15 states have (on average 55.93333333333333) internal successors, (839), 15 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:57,094 INFO L93 Difference]: Finished difference Result 5532 states and 9196 transitions. [2022-11-16 12:10:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 12:10:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 55.93333333333333) internal successors, (839), 15 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1104 [2022-11-16 12:10:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:57,100 INFO L225 Difference]: With dead ends: 5532 [2022-11-16 12:10:57,100 INFO L226 Difference]: Without dead ends: 4266 [2022-11-16 12:10:57,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2273 GetRequests, 2211 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=635, Invalid=3397, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 12:10:57,103 INFO L413 NwaCegarLoop]: 2687 mSDtfsCounter, 28125 mSDsluCounter, 34340 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28125 SdHoareTripleChecker+Valid, 37027 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:57,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28125 Valid, 37027 Invalid, 234 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:10:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2022-11-16 12:10:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 1634. [2022-11-16 12:10:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:10:57,134 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1104 [2022-11-16 12:10:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:57,134 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:10:57,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.93333333333333) internal successors, (839), 15 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:10:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1106 [2022-11-16 12:10:57,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:57,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:57,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:57,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:10:57,344 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1938006141, now seen corresponding path program 1 times [2022-11-16 12:10:57,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:57,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918620836] [2022-11-16 12:10:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:57,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:57,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:10:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765650272] [2022-11-16 12:10:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:57,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:10:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:10:57,639 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:10:57,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:11:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 8693 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-16 12:11:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:07,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-16 12:11:11,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:11,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918620836] [2022-11-16 12:11:11,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:11:11,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765650272] [2022-11-16 12:11:11,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765650272] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:11,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:11:11,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 35 [2022-11-16 12:11:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555825762] [2022-11-16 12:11:11,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:11:11,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:11:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:11:11,739 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 17 states, 17 states have (on average 49.529411764705884) internal successors, (842), 17 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:57,468 INFO L93 Difference]: Finished difference Result 8854 states and 14608 transitions. [2022-11-16 12:11:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:11:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 49.529411764705884) internal successors, (842), 17 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1105 [2022-11-16 12:11:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:57,475 INFO L225 Difference]: With dead ends: 8854 [2022-11-16 12:11:57,475 INFO L226 Difference]: Without dead ends: 7621 [2022-11-16 12:11:57,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2306 GetRequests, 2224 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1057, Invalid=5915, Unknown=0, NotChecked=0, Total=6972 [2022-11-16 12:11:57,479 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 50641 mSDsluCounter, 26635 mSDsCounter, 0 mSdLazyCounter, 56677 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50641 SdHoareTripleChecker+Valid, 29793 SdHoareTripleChecker+Invalid, 57016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 56677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:57,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50641 Valid, 29793 Invalid, 57016 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [339 Valid, 56677 Invalid, 0 Unknown, 0 Unchecked, 41.7s Time] [2022-11-16 12:11:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7621 states. [2022-11-16 12:11:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7621 to 1673. [2022-11-16 12:11:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 1.6626794258373205) internal successors, (2780), 1672 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2780 transitions. [2022-11-16 12:11:57,511 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2780 transitions. Word has length 1105 [2022-11-16 12:11:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:57,512 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2780 transitions. [2022-11-16 12:11:57,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 49.529411764705884) internal successors, (842), 17 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2780 transitions. [2022-11-16 12:11:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1106 [2022-11-16 12:11:57,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:57,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:57,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-16 12:11:57,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:11:57,723 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1937946559, now seen corresponding path program 1 times [2022-11-16 12:11:57,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:57,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111687824] [2022-11-16 12:11:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:57,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:58,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:11:58,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289174068] [2022-11-16 12:11:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:58,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:58,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:58,028 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:58,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:12:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 8693 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-16 12:12:03,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:05,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-16 12:12:07,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:12:07,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111687824] [2022-11-16 12:12:07,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:12:07,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289174068] [2022-11-16 12:12:07,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289174068] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:12:07,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:12:07,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [19] total 32 [2022-11-16 12:12:07,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34421204] [2022-11-16 12:12:07,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:07,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:12:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:12:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:12:07,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:12:07,794 INFO L87 Difference]: Start difference. First operand 1673 states and 2780 transitions. Second operand has 16 states, 16 states have (on average 52.625) internal successors, (842), 16 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:10,490 INFO L93 Difference]: Finished difference Result 5562 states and 9246 transitions. [2022-11-16 12:12:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:12:10,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 52.625) internal successors, (842), 16 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1105 [2022-11-16 12:12:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:10,495 INFO L225 Difference]: With dead ends: 5562 [2022-11-16 12:12:10,495 INFO L226 Difference]: Without dead ends: 4290 [2022-11-16 12:12:10,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2281 GetRequests, 2214 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=733, Invalid=3959, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 12:12:10,497 INFO L413 NwaCegarLoop]: 2685 mSDtfsCounter, 30172 mSDsluCounter, 37024 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30172 SdHoareTripleChecker+Valid, 39709 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:10,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30172 Valid, 39709 Invalid, 265 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:12:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2022-11-16 12:12:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 1634. [2022-11-16 12:12:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.6631965707287202) internal successors, (2716), 1633 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2716 transitions. [2022-11-16 12:12:10,520 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2716 transitions. Word has length 1105 [2022-11-16 12:12:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:10,521 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2716 transitions. [2022-11-16 12:12:10,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.625) internal successors, (842), 16 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2716 transitions. [2022-11-16 12:12:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1107 [2022-11-16 12:12:10,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:10,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:10,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:10,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:12:10,731 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:12:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2006070947, now seen corresponding path program 1 times [2022-11-16 12:12:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:12:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254353571] [2022-11-16 12:12:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:10,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:12:11,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:12:11,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758329960] [2022-11-16 12:12:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:11,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:12:11,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:12:11,035 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:12:11,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:12:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:16,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 8696 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-16 12:12:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:21,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-11-16 12:12:24,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:12:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254353571] [2022-11-16 12:12:24,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:12:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758329960] [2022-11-16 12:12:24,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758329960] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:12:24,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:12:24,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [21] total 37 [2022-11-16 12:12:24,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232877924] [2022-11-16 12:12:24,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:24,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:12:24,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:12:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:12:24,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:12:24,654 INFO L87 Difference]: Start difference. First operand 1634 states and 2716 transitions. Second operand has 18 states, 18 states have (on average 46.94444444444444) internal successors, (845), 18 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:13,551 INFO L93 Difference]: Finished difference Result 8890 states and 14668 transitions. [2022-11-16 12:13:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 12:13:13,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 46.94444444444444) internal successors, (845), 18 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1106 [2022-11-16 12:13:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:13,557 INFO L225 Difference]: With dead ends: 8890 [2022-11-16 12:13:13,557 INFO L226 Difference]: Without dead ends: 7654 [2022-11-16 12:13:13,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2316 GetRequests, 2228 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1207, Invalid=6803, Unknown=0, NotChecked=0, Total=8010 [2022-11-16 12:13:13,560 INFO L413 NwaCegarLoop]: 3151 mSDtfsCounter, 54675 mSDsluCounter, 28669 mSDsCounter, 0 mSdLazyCounter, 60667 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54675 SdHoareTripleChecker+Valid, 31820 SdHoareTripleChecker+Invalid, 61006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 60667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:13,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54675 Valid, 31820 Invalid, 61006 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [339 Valid, 60667 Invalid, 0 Unknown, 0 Unchecked, 44.4s Time] [2022-11-16 12:13:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7654 states. [2022-11-16 12:13:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7654 to 1676. [2022-11-16 12:13:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 1.662686567164179) internal successors, (2785), 1675 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2785 transitions. [2022-11-16 12:13:13,594 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2785 transitions. Word has length 1106 [2022-11-16 12:13:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:13,595 INFO L495 AbstractCegarLoop]: Abstraction has 1676 states and 2785 transitions. [2022-11-16 12:13:13,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 46.94444444444444) internal successors, (845), 18 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2785 transitions. [2022-11-16 12:13:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1107 [2022-11-16 12:13:13,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:13,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:13,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:13:13,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:13:13,805 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:13:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2006130529, now seen corresponding path program 1 times [2022-11-16 12:13:13,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:13:13,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056568983] [2022-11-16 12:13:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:13,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:13:14,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:13:14,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523272294] [2022-11-16 12:13:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:14,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:13:14,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:13:14,130 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:13:14,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cfff4cd-284c-4ebc-b774-b908bc0f44e6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process