./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.1.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.1.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro --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 b43018962f19dc4a60e785bc21d5335876f9ce98557fd04bdc605f9843c5b73d --- 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-8393723 [2022-11-18 20:18:09,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:18:09,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:18:09,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:18:09,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:18:09,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:18:09,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:18:09,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:18:09,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:18:09,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:18:09,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:18:09,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:18:09,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:18:09,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:18:09,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:18:09,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:18:09,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:18:09,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:18:09,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:18:09,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:18:09,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:18:09,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:18:09,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:18:09,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:18:09,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:18:09,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:18:09,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:18:09,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:18:09,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:18:09,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:18:09,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:18:09,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:18:09,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:18:09,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:18:09,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:18:09,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:18:09,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:18:09,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:18:09,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:18:09,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:18:09,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:18:09,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:18:09,143 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:18:09,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:18:09,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:18:09,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:18:09,145 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:18:09,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:18:09,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:18:09,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:18:09,147 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:18:09,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:18:09,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:18:09,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:18:09,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:18:09,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:18:09,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:18:09,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:18:09,149 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:18:09,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:18:09,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:18:09,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:18:09,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:18:09,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:18:09,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:18:09,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:18:09,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:18:09,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:18:09,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:18:09,152 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:18:09,153 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:18:09,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:18:09,154 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_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b43018962f19dc4a60e785bc21d5335876f9ce98557fd04bdc605f9843c5b73d [2022-11-18 20:18:09,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:18:09,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:18:09,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:18:09,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:18:09,434 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:18:09,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.1.prop1-back-serstep.c [2022-11-18 20:18:09,525 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/data/8758d4cd8/1c1fc58afbc949a296af269336804177/FLAG7b29727c3 [2022-11-18 20:18:10,252 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:18:10,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.1.prop1-back-serstep.c [2022-11-18 20:18:10,270 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/data/8758d4cd8/1c1fc58afbc949a296af269336804177/FLAG7b29727c3 [2022-11-18 20:18:10,444 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/data/8758d4cd8/1c1fc58afbc949a296af269336804177 [2022-11-18 20:18:10,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:18:10,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:18:10,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:18:10,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:18:10,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:18:10,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:18:10" (1/1) ... [2022-11-18 20:18:10,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44888b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:10, skipping insertion in model container [2022-11-18 20:18:10,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:18:10" (1/1) ... [2022-11-18 20:18:10,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:18:10,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:18:10,842 WARN L234 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_35d36479-e8a7-4dfc-a21f-e55b35041536/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.1.prop1-back-serstep.c[1014,1027] [2022-11-18 20:18:11,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:18:11,159 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:18:11,171 WARN L234 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_35d36479-e8a7-4dfc-a21f-e55b35041536/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.1.prop1-back-serstep.c[1014,1027] [2022-11-18 20:18:11,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:18:11,310 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:18:11,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11 WrapperNode [2022-11-18 20:18:11,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:18:11,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:18:11,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:18:11,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:18:11,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,459 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2033 [2022-11-18 20:18:11,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:18:11,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:18:11,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:18:11,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:18:11,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,583 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:18:11,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:18:11,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:18:11,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:18:11,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (1/1) ... [2022-11-18 20:18:11,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:18:11,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:11,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:18:11,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:18:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:18:11,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:18:12,177 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:18:12,181 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:18:14,496 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:18:14,518 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:18:14,518 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:18:14,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:18:14 BoogieIcfgContainer [2022-11-18 20:18:14,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:18:14,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:18:14,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:18:14,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:18:14,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:18:10" (1/3) ... [2022-11-18 20:18:14,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3076a1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:18:14, skipping insertion in model container [2022-11-18 20:18:14,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:11" (2/3) ... [2022-11-18 20:18:14,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3076a1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:18:14, skipping insertion in model container [2022-11-18 20:18:14,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:18:14" (3/3) ... [2022-11-18 20:18:14,533 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.fischer.1.prop1-back-serstep.c [2022-11-18 20:18:14,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:18:14,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:18:14,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:18:14,638 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;@449b4b3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:18:14,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:18:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 345 states have (on average 1.6608695652173913) internal successors, (573), 346 states have internal predecessors, (573), 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) [2022-11-18 20:18:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 20:18:14,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:14,657 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] [2022-11-18 20:18:14,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash 887836145, now seen corresponding path program 1 times [2022-11-18 20:18:14,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:14,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793926884] [2022-11-18 20:18:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:18:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:15,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793926884] [2022-11-18 20:18:15,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793926884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:18:15,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:18:15,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:18:15,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314890797] [2022-11-18 20:18:15,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:15,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:18:15,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:18:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:18:15,936 INFO L87 Difference]: Start difference. First operand has 347 states, 345 states have (on average 1.6608695652173913) internal successors, (573), 346 states have internal predecessors, (573), 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 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:18:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:16,254 INFO L93 Difference]: Finished difference Result 1147 states and 1907 transitions. [2022-11-18 20:18:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:18:16,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-18 20:18:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:16,293 INFO L225 Difference]: With dead ends: 1147 [2022-11-18 20:18:16,293 INFO L226 Difference]: Without dead ends: 802 [2022-11-18 20:18:16,298 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 [2022-11-18 20:18:16,305 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 1677 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:16,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 1723 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:18:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-18 20:18:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 345. [2022-11-18 20:18:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.6540697674418605) internal successors, (569), 344 states have internal predecessors, (569), 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) [2022-11-18 20:18:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 569 transitions. [2022-11-18 20:18:16,441 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 569 transitions. Word has length 85 [2022-11-18 20:18:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:16,442 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 569 transitions. [2022-11-18 20:18:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:18:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 569 transitions. [2022-11-18 20:18:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-18 20:18:16,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:16,446 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] [2022-11-18 20:18:16,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:18:16,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1754842147, now seen corresponding path program 1 times [2022-11-18 20:18:16,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:16,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816606236] [2022-11-18 20:18:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:16,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:18:16,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:16,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816606236] [2022-11-18 20:18:16,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816606236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:18:16,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:18:16,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:18:16,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856594026] [2022-11-18 20:18:16,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:16,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:18:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:18:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:18:16,978 INFO L87 Difference]: Start difference. First operand 345 states and 569 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2022-11-18 20:18:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:17,340 INFO L93 Difference]: Finished difference Result 1361 states and 2254 transitions. [2022-11-18 20:18:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:18:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-18 20:18:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:17,349 INFO L225 Difference]: With dead ends: 1361 [2022-11-18 20:18:17,349 INFO L226 Difference]: Without dead ends: 1018 [2022-11-18 20:18:17,356 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 [2022-11-18 20:18:17,357 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 1402 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:17,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 1881 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:18:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-11-18 20:18:17,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 464. [2022-11-18 20:18:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.654427645788337) internal successors, (766), 463 states have internal predecessors, (766), 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) [2022-11-18 20:18:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 766 transitions. [2022-11-18 20:18:17,415 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 766 transitions. Word has length 86 [2022-11-18 20:18:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:17,422 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 766 transitions. [2022-11-18 20:18:17,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2022-11-18 20:18:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 766 transitions. [2022-11-18 20:18:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-11-18 20:18:17,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:17,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:17,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:18:17,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1678903929, now seen corresponding path program 1 times [2022-11-18 20:18:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:17,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469652538] [2022-11-18 20:18:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:17,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:17,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:17,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754057831] [2022-11-18 20:18:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:17,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:17,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:17,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:17,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:18:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 20:18:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:18:21,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:18:24,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:24,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469652538] [2022-11-18 20:18:24,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754057831] [2022-11-18 20:18:24,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754057831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:18:24,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:18:24,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-11-18 20:18:24,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816416783] [2022-11-18 20:18:24,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:24,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:18:24,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:24,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:18:24,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:18:24,284 INFO L87 Difference]: Start difference. First operand 464 states and 766 transitions. Second operand has 19 states, 19 states have (on average 32.8421052631579) internal successors, (624), 19 states have internal predecessors, (624), 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) [2022-11-18 20:18:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:37,450 INFO L93 Difference]: Finished difference Result 3962 states and 6569 transitions. [2022-11-18 20:18:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:18:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 32.8421052631579) internal successors, (624), 19 states have internal predecessors, (624), 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 313 [2022-11-18 20:18:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:37,465 INFO L225 Difference]: With dead ends: 3962 [2022-11-18 20:18:37,465 INFO L226 Difference]: Without dead ends: 3619 [2022-11-18 20:18:37,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=648, Invalid=1608, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:18:37,469 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 17958 mSDsluCounter, 3052 mSDsCounter, 0 mSdLazyCounter, 10922 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17958 SdHoareTripleChecker+Valid, 3402 SdHoareTripleChecker+Invalid, 10952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 10922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:37,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17958 Valid, 3402 Invalid, 10952 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 10922 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-11-18 20:18:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2022-11-18 20:18:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 801. [2022-11-18 20:18:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.655) internal successors, (1324), 800 states have internal predecessors, (1324), 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) [2022-11-18 20:18:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1324 transitions. [2022-11-18 20:18:37,511 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1324 transitions. Word has length 313 [2022-11-18 20:18:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:37,512 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1324 transitions. [2022-11-18 20:18:37,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 32.8421052631579) internal successors, (624), 19 states have internal predecessors, (624), 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) [2022-11-18 20:18:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1324 transitions. [2022-11-18 20:18:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-18 20:18:37,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:37,519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:37,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:37,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:37,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1446607935, now seen corresponding path program 1 times [2022-11-18 20:18:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278318643] [2022-11-18 20:18:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:37,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:37,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:37,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11361749] [2022-11-18 20:18:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:37,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:37,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:37,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:37,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:18:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 20:18:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:18:40,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 20:18:41,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278318643] [2022-11-18 20:18:41,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:41,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11361749] [2022-11-18 20:18:41,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11361749] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:18:41,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:18:41,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-18 20:18:41,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827827206] [2022-11-18 20:18:41,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:41,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:18:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:18:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:18:41,443 INFO L87 Difference]: Start difference. First operand 801 states and 1324 transitions. Second operand has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 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) [2022-11-18 20:18:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:44,370 INFO L93 Difference]: Finished difference Result 2151 states and 3557 transitions. [2022-11-18 20:18:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:18:44,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 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 314 [2022-11-18 20:18:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:44,380 INFO L225 Difference]: With dead ends: 2151 [2022-11-18 20:18:44,380 INFO L226 Difference]: Without dead ends: 2149 [2022-11-18 20:18:44,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:18:44,383 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 4455 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4455 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:44,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4455 Valid, 1439 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-18 20:18:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2022-11-18 20:18:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 804. [2022-11-18 20:18:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 1.6550435865504358) internal successors, (1329), 803 states have internal predecessors, (1329), 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) [2022-11-18 20:18:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1329 transitions. [2022-11-18 20:18:44,411 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1329 transitions. Word has length 314 [2022-11-18 20:18:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:44,412 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 1329 transitions. [2022-11-18 20:18:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 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) [2022-11-18 20:18:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1329 transitions. [2022-11-18 20:18:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-18 20:18:44,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:44,418 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:44,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:44,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:44,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1446548353, now seen corresponding path program 1 times [2022-11-18 20:18:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:44,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775158135] [2022-11-18 20:18:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:44,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:44,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:44,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580328146] [2022-11-18 20:18:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:44,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:44,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:44,761 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:44,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:18:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 20:18:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:18:47,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 20:18:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:48,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775158135] [2022-11-18 20:18:48,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:48,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580328146] [2022-11-18 20:18:48,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580328146] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:18:48,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:18:48,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2022-11-18 20:18:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970539573] [2022-11-18 20:18:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:48,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:18:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:18:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:18:48,434 INFO L87 Difference]: Start difference. First operand 804 states and 1329 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 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) [2022-11-18 20:18:48,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:48,577 INFO L93 Difference]: Finished difference Result 2156 states and 3567 transitions. [2022-11-18 20:18:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:18:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 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 314 [2022-11-18 20:18:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:48,586 INFO L225 Difference]: With dead ends: 2156 [2022-11-18 20:18:48,586 INFO L226 Difference]: Without dead ends: 1810 [2022-11-18 20:18:48,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:18:48,589 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 1667 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:48,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 2068 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:18:48,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-11-18 20:18:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 801. [2022-11-18 20:18:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.655) internal successors, (1324), 800 states have internal predecessors, (1324), 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) [2022-11-18 20:18:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1324 transitions. [2022-11-18 20:18:48,653 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1324 transitions. Word has length 314 [2022-11-18 20:18:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:48,654 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1324 transitions. [2022-11-18 20:18:48,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 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) [2022-11-18 20:18:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1324 transitions. [2022-11-18 20:18:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-11-18 20:18:48,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:48,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:48,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:48,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:48,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2105605011, now seen corresponding path program 1 times [2022-11-18 20:18:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:48,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295823160] [2022-11-18 20:18:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:48,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:49,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:49,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176904257] [2022-11-18 20:18:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:49,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:49,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:49,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:49,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:18:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:50,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 20:18:50,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:18:51,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 20:18:52,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:52,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295823160] [2022-11-18 20:18:52,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:52,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176904257] [2022-11-18 20:18:52,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176904257] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:18:52,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:18:52,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-18 20:18:52,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100088311] [2022-11-18 20:18:52,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:52,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:18:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:18:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:18:52,950 INFO L87 Difference]: Start difference. First operand 801 states and 1324 transitions. Second operand has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 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) [2022-11-18 20:18:56,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:56,795 INFO L93 Difference]: Finished difference Result 2841 states and 4694 transitions. [2022-11-18 20:18:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:18:56,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 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 315 [2022-11-18 20:18:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:56,806 INFO L225 Difference]: With dead ends: 2841 [2022-11-18 20:18:56,806 INFO L226 Difference]: Without dead ends: 2839 [2022-11-18 20:18:56,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:18:56,808 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 8925 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2514 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8925 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:56,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8925 Valid, 1509 Invalid, 2525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2514 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 20:18:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2022-11-18 20:18:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 807. [2022-11-18 20:18:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.6550868486352357) internal successors, (1334), 806 states have internal predecessors, (1334), 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) [2022-11-18 20:18:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1334 transitions. [2022-11-18 20:18:56,850 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1334 transitions. Word has length 315 [2022-11-18 20:18:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:56,851 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1334 transitions. [2022-11-18 20:18:56,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 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) [2022-11-18 20:18:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1334 transitions. [2022-11-18 20:18:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-11-18 20:18:56,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:56,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:56,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:57,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:18:57,073 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2105545429, now seen corresponding path program 1 times [2022-11-18 20:18:57,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:57,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81733141] [2022-11-18 20:18:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:57,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:57,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:57,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963626790] [2022-11-18 20:18:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:57,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:57,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:57,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:57,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:18:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:58,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:18:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:00,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 20:19:01,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:01,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81733141] [2022-11-18 20:19:01,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:19:01,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963626790] [2022-11-18 20:19:01,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963626790] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:01,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:01,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-18 20:19:01,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463708499] [2022-11-18 20:19:01,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:01,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:19:01,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:19:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:19:01,730 INFO L87 Difference]: Start difference. First operand 807 states and 1334 transitions. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2022-11-18 20:19:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:04,928 INFO L93 Difference]: Finished difference Result 2858 states and 4724 transitions. [2022-11-18 20:19:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:19:04,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 315 [2022-11-18 20:19:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:04,938 INFO L225 Difference]: With dead ends: 2858 [2022-11-18 20:19:04,938 INFO L226 Difference]: Without dead ends: 2507 [2022-11-18 20:19:04,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:19:04,941 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 3355 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 3196 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3355 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:04,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3355 Valid, 2097 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3196 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-18 20:19:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-11-18 20:19:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 807. [2022-11-18 20:19:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.6538461538461537) internal successors, (1333), 806 states have internal predecessors, (1333), 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) [2022-11-18 20:19:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1333 transitions. [2022-11-18 20:19:04,976 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1333 transitions. Word has length 315 [2022-11-18 20:19:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:04,976 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1333 transitions. [2022-11-18 20:19:04,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2022-11-18 20:19:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1333 transitions. [2022-11-18 20:19:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-11-18 20:19:04,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:04,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:05,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:05,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:05,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash 357634341, now seen corresponding path program 1 times [2022-11-18 20:19:05,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:05,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289619501] [2022-11-18 20:19:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:05,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:05,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:19:05,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601156607] [2022-11-18 20:19:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:05,299 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:05,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:19:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 20:19:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:07,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 20:19:09,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:09,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289619501] [2022-11-18 20:19:09,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:19:09,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601156607] [2022-11-18 20:19:09,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601156607] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:09,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:09,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-11-18 20:19:09,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138914822] [2022-11-18 20:19:09,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:09,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:19:09,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:19:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:19:09,149 INFO L87 Difference]: Start difference. First operand 807 states and 1333 transitions. Second operand has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 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) [2022-11-18 20:19:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:14,267 INFO L93 Difference]: Finished difference Result 2896 states and 4777 transitions. [2022-11-18 20:19:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:19:14,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 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 316 [2022-11-18 20:19:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:14,278 INFO L225 Difference]: With dead ends: 2896 [2022-11-18 20:19:14,278 INFO L226 Difference]: Without dead ends: 2894 [2022-11-18 20:19:14,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:19:14,280 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 9537 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 3305 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9537 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 3313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:14,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9537 Valid, 2037 Invalid, 3313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3305 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-18 20:19:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2022-11-18 20:19:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 816. [2022-11-18 20:19:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 1.6539877300613497) internal successors, (1348), 815 states have internal predecessors, (1348), 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) [2022-11-18 20:19:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1348 transitions. [2022-11-18 20:19:14,321 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1348 transitions. Word has length 316 [2022-11-18 20:19:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:14,322 INFO L495 AbstractCegarLoop]: Abstraction has 816 states and 1348 transitions. [2022-11-18 20:19:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 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) [2022-11-18 20:19:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1348 transitions. [2022-11-18 20:19:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-11-18 20:19:14,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:14,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:14,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:14,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:14,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:14,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:14,542 INFO L85 PathProgramCache]: Analyzing trace with hash 357693923, now seen corresponding path program 1 times [2022-11-18 20:19:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:14,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106822408] [2022-11-18 20:19:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:14,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:19:14,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181541718] [2022-11-18 20:19:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:14,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:14,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:14,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:14,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:19:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:15,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 20:19:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:18,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 20:19:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106822408] [2022-11-18 20:19:19,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:19:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181541718] [2022-11-18 20:19:19,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181541718] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:19,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:19,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-18 20:19:19,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195845348] [2022-11-18 20:19:19,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:19,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:19:19,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:19:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:19:19,276 INFO L87 Difference]: Start difference. First operand 816 states and 1348 transitions. Second operand has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 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) [2022-11-18 20:19:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:23,450 INFO L93 Difference]: Finished difference Result 2925 states and 4826 transitions. [2022-11-18 20:19:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:19:23,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 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 316 [2022-11-18 20:19:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:23,457 INFO L225 Difference]: With dead ends: 2925 [2022-11-18 20:19:23,457 INFO L226 Difference]: Without dead ends: 2565 [2022-11-18 20:19:23,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:19:23,459 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 3939 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3939 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 3970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:23,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3939 Valid, 2649 Invalid, 3970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-18 20:19:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2022-11-18 20:19:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 810. [2022-11-18 20:19:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 1.65389369592089) internal successors, (1338), 809 states have internal predecessors, (1338), 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) [2022-11-18 20:19:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1338 transitions. [2022-11-18 20:19:23,494 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1338 transitions. Word has length 316 [2022-11-18 20:19:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:23,495 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1338 transitions. [2022-11-18 20:19:23,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 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) [2022-11-18 20:19:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1338 transitions. [2022-11-18 20:19:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-11-18 20:19:23,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:23,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:23,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:23,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:19:23,717 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1380518267, now seen corresponding path program 1 times [2022-11-18 20:19:23,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:23,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382257188] [2022-11-18 20:19:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:23,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:23,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:19:23,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68229156] [2022-11-18 20:19:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:23,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:23,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:23,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:23,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:19:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:24,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:19:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:26,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 20:19:27,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382257188] [2022-11-18 20:19:27,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:19:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68229156] [2022-11-18 20:19:27,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68229156] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:27,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:27,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2022-11-18 20:19:27,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364090744] [2022-11-18 20:19:27,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:27,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:19:27,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:19:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:19:27,911 INFO L87 Difference]: Start difference. First operand 810 states and 1338 transitions. Second operand has 10 states, 10 states have (on average 24.6) internal successors, (246), 10 states have internal predecessors, (246), 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) [2022-11-18 20:19:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:33,772 INFO L93 Difference]: Finished difference Result 2950 states and 4864 transitions. [2022-11-18 20:19:33,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:19:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.6) internal successors, (246), 10 states have internal predecessors, (246), 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 317 [2022-11-18 20:19:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:33,784 INFO L225 Difference]: With dead ends: 2950 [2022-11-18 20:19:33,785 INFO L226 Difference]: Without dead ends: 2948 [2022-11-18 20:19:33,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:19:33,788 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 12394 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12394 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:33,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12394 Valid, 1941 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-18 20:19:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2022-11-18 20:19:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 822. [2022-11-18 20:19:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.654080389768575) internal successors, (1358), 821 states have internal predecessors, (1358), 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) [2022-11-18 20:19:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1358 transitions. [2022-11-18 20:19:33,819 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1358 transitions. Word has length 317 [2022-11-18 20:19:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:33,820 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1358 transitions. [2022-11-18 20:19:33,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.6) internal successors, (246), 10 states have internal predecessors, (246), 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) [2022-11-18 20:19:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1358 transitions. [2022-11-18 20:19:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-11-18 20:19:33,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:33,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:33,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:34,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:19:34,041 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:34,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1380458685, now seen corresponding path program 1 times [2022-11-18 20:19:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:34,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344784160] [2022-11-18 20:19:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:34,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:19:34,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252711842] [2022-11-18 20:19:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:34,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:34,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:34,135 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:34,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:19:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-18 20:19:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:38,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 20:19:39,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:39,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344784160] [2022-11-18 20:19:39,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:19:39,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252711842] [2022-11-18 20:19:39,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252711842] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:39,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:39,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 22 [2022-11-18 20:19:39,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642511405] [2022-11-18 20:19:39,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:39,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:19:39,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:19:39,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:19:39,516 INFO L87 Difference]: Start difference. First operand 822 states and 1358 transitions. Second operand has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 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) [2022-11-18 20:19:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:46,235 INFO L93 Difference]: Finished difference Result 5709 states and 9416 transitions. [2022-11-18 20:19:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 20:19:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 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 317 [2022-11-18 20:19:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:46,247 INFO L225 Difference]: With dead ends: 5709 [2022-11-18 20:19:46,248 INFO L226 Difference]: Without dead ends: 5343 [2022-11-18 20:19:46,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=472, Invalid=2498, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:19:46,251 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 16691 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 3844 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16691 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 3855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:46,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16691 Valid, 2249 Invalid, 3855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3844 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-18 20:19:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2022-11-18 20:19:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 825. [2022-11-18 20:19:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 1.654126213592233) internal successors, (1363), 824 states have internal predecessors, (1363), 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) [2022-11-18 20:19:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1363 transitions. [2022-11-18 20:19:46,292 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1363 transitions. Word has length 317 [2022-11-18 20:19:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:46,293 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 1363 transitions. [2022-11-18 20:19:46,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 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) [2022-11-18 20:19:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1363 transitions. [2022-11-18 20:19:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-11-18 20:19:46,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:46,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:46,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 20:19:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:19:46,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 394548677, now seen corresponding path program 1 times [2022-11-18 20:19:46,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:46,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985772759] [2022-11-18 20:19:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:46,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:46,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:19:46,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139802360] [2022-11-18 20:19:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:46,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:46,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:46,623 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:46,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:19:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 20:19:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:49,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 20:19:50,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:50,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985772759] [2022-11-18 20:19:50,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:19:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139802360] [2022-11-18 20:19:50,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139802360] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:50,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:50,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2022-11-18 20:19:50,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934716193] [2022-11-18 20:19:50,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:50,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:19:50,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:50,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:19:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:19:50,684 INFO L87 Difference]: Start difference. First operand 825 states and 1363 transitions. Second operand has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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) [2022-11-18 20:19:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:51,033 INFO L93 Difference]: Finished difference Result 2279 states and 3761 transitions. [2022-11-18 20:19:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:19:51,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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 317 [2022-11-18 20:19:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:51,038 INFO L225 Difference]: With dead ends: 2279 [2022-11-18 20:19:51,038 INFO L226 Difference]: Without dead ends: 1910 [2022-11-18 20:19:51,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:19:51,040 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 3379 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3379 SdHoareTripleChecker+Valid, 4324 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:51,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3379 Valid, 4324 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:19:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-11-18 20:19:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 813. [2022-11-18 20:19:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.6539408866995073) internal successors, (1343), 812 states have internal predecessors, (1343), 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) [2022-11-18 20:19:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1343 transitions. [2022-11-18 20:19:51,092 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1343 transitions. Word has length 317 [2022-11-18 20:19:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:51,092 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1343 transitions. [2022-11-18 20:19:51,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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) [2022-11-18 20:19:51,093 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1343 transitions. [2022-11-18 20:19:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-18 20:19:51,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:51,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:51,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:19:51,315 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash 310115915, now seen corresponding path program 1 times [2022-11-18 20:19:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698210351] [2022-11-18 20:19:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:51,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:19:51,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854055245] [2022-11-18 20:19:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:51,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:51,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:51,412 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:51,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:19:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 20:19:52,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:54,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:19:55,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:55,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698210351] [2022-11-18 20:19:55,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:19:55,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854055245] [2022-11-18 20:19:55,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854055245] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:55,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:55,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2022-11-18 20:19:55,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273537203] [2022-11-18 20:19:55,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:55,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:19:55,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:55,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:19:55,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:19:55,297 INFO L87 Difference]: Start difference. First operand 813 states and 1343 transitions. Second operand has 11 states, 11 states have (on average 22.636363636363637) internal successors, (249), 11 states have internal predecessors, (249), 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) [2022-11-18 20:20:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:03,713 INFO L93 Difference]: Finished difference Result 3010 states and 4963 transitions. [2022-11-18 20:20:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 20:20:03,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.636363636363637) internal successors, (249), 11 states have internal predecessors, (249), 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 318 [2022-11-18 20:20:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:03,721 INFO L225 Difference]: With dead ends: 3010 [2022-11-18 20:20:03,721 INFO L226 Difference]: Without dead ends: 3008 [2022-11-18 20:20:03,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=672, Invalid=3234, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 20:20:03,725 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 14662 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 4406 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14662 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:03,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14662 Valid, 2277 Invalid, 4416 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10 Valid, 4406 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-18 20:20:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2022-11-18 20:20:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 828. [2022-11-18 20:20:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.6541717049576783) internal successors, (1368), 827 states have internal predecessors, (1368), 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) [2022-11-18 20:20:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1368 transitions. [2022-11-18 20:20:03,765 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1368 transitions. Word has length 318 [2022-11-18 20:20:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:03,765 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1368 transitions. [2022-11-18 20:20:03,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.636363636363637) internal successors, (249), 11 states have internal predecessors, (249), 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) [2022-11-18 20:20:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1368 transitions. [2022-11-18 20:20:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-18 20:20:03,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:03,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:03,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:03,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:03,978 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:03,978 INFO L85 PathProgramCache]: Analyzing trace with hash 310175497, now seen corresponding path program 1 times [2022-11-18 20:20:03,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:03,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894763905] [2022-11-18 20:20:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:03,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:04,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:20:04,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571774433] [2022-11-18 20:20:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:04,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:04,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:04,101 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:04,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:20:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:05,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:20:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:08,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:20:09,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:09,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894763905] [2022-11-18 20:20:09,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:20:09,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571774433] [2022-11-18 20:20:09,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571774433] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:09,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:20:09,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-11-18 20:20:09,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188840656] [2022-11-18 20:20:09,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:09,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:20:09,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:20:09,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:20:09,182 INFO L87 Difference]: Start difference. First operand 828 states and 1368 transitions. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2022-11-18 20:20:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:14,561 INFO L93 Difference]: Finished difference Result 3096 states and 5107 transitions. [2022-11-18 20:20:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:20:14,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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 318 [2022-11-18 20:20:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:14,565 INFO L225 Difference]: With dead ends: 3096 [2022-11-18 20:20:14,565 INFO L226 Difference]: Without dead ends: 2715 [2022-11-18 20:20:14,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:20:14,568 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 5122 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 5515 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5122 SdHoareTripleChecker+Valid, 3744 SdHoareTripleChecker+Invalid, 5519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:14,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5122 Valid, 3744 Invalid, 5519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5515 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-18 20:20:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2022-11-18 20:20:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 822. [2022-11-18 20:20:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.654080389768575) internal successors, (1358), 821 states have internal predecessors, (1358), 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) [2022-11-18 20:20:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1358 transitions. [2022-11-18 20:20:14,595 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1358 transitions. Word has length 318 [2022-11-18 20:20:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:14,596 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1358 transitions. [2022-11-18 20:20:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2022-11-18 20:20:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1358 transitions. [2022-11-18 20:20:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-18 20:20:14,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:14,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:14,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:14,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:14,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1959220319, now seen corresponding path program 1 times [2022-11-18 20:20:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:14,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849682413] [2022-11-18 20:20:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:14,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:20:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872788703] [2022-11-18 20:20:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:14,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:14,901 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:14,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:20:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-18 20:20:16,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:17,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:20:19,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:19,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849682413] [2022-11-18 20:20:19,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:20:19,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872788703] [2022-11-18 20:20:19,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872788703] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:19,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:20:19,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2022-11-18 20:20:19,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063525663] [2022-11-18 20:20:19,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:19,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:20:19,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:20:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:20:19,393 INFO L87 Difference]: Start difference. First operand 822 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 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) [2022-11-18 20:20:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:28,765 INFO L93 Difference]: Finished difference Result 3154 states and 5198 transitions. [2022-11-18 20:20:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:20:28,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 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 319 [2022-11-18 20:20:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:28,772 INFO L225 Difference]: With dead ends: 3154 [2022-11-18 20:20:28,772 INFO L226 Difference]: Without dead ends: 3152 [2022-11-18 20:20:28,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=886, Invalid=4370, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 20:20:28,776 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 14694 mSDsluCounter, 3020 mSDsCounter, 0 mSdLazyCounter, 5398 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14694 SdHoareTripleChecker+Valid, 3369 SdHoareTripleChecker+Invalid, 5408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 5398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:28,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14694 Valid, 3369 Invalid, 5408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10 Valid, 5398 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-18 20:20:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2022-11-18 20:20:28,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 840. [2022-11-18 20:20:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.6543504171632897) internal successors, (1388), 839 states have internal predecessors, (1388), 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) [2022-11-18 20:20:28,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1388 transitions. [2022-11-18 20:20:28,810 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1388 transitions. Word has length 319 [2022-11-18 20:20:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:28,810 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1388 transitions. [2022-11-18 20:20:28,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 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) [2022-11-18 20:20:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1388 transitions. [2022-11-18 20:20:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-18 20:20:28,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:28,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:28,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:29,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:29,033 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1959279901, now seen corresponding path program 1 times [2022-11-18 20:20:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:29,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777837835] [2022-11-18 20:20:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:29,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:29,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:20:29,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168716788] [2022-11-18 20:20:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:29,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:29,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:29,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:29,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:20:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:30,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-18 20:20:30,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:20:34,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777837835] [2022-11-18 20:20:34,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:20:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168716788] [2022-11-18 20:20:34,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168716788] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:34,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:20:34,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2022-11-18 20:20:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803780498] [2022-11-18 20:20:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:34,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:20:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:20:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:20:34,403 INFO L87 Difference]: Start difference. First operand 840 states and 1388 transitions. Second operand has 10 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 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) [2022-11-18 20:20:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:40,602 INFO L93 Difference]: Finished difference Result 3222 states and 5317 transitions. [2022-11-18 20:20:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:20:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 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 319 [2022-11-18 20:20:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:40,608 INFO L225 Difference]: With dead ends: 3222 [2022-11-18 20:20:40,608 INFO L226 Difference]: Without dead ends: 2829 [2022-11-18 20:20:40,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=1878, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:20:40,611 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 5721 mSDsluCounter, 3740 mSDsCounter, 0 mSdLazyCounter, 6294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5721 SdHoareTripleChecker+Valid, 4287 SdHoareTripleChecker+Invalid, 6298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:40,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5721 Valid, 4287 Invalid, 6298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6294 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-18 20:20:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2022-11-18 20:20:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 825. [2022-11-18 20:20:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 1.654126213592233) internal successors, (1363), 824 states have internal predecessors, (1363), 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) [2022-11-18 20:20:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1363 transitions. [2022-11-18 20:20:40,638 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1363 transitions. Word has length 319 [2022-11-18 20:20:40,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:40,639 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 1363 transitions. [2022-11-18 20:20:40,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 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) [2022-11-18 20:20:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1363 transitions. [2022-11-18 20:20:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-11-18 20:20:40,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:40,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:40,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:20:40,859 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 504922799, now seen corresponding path program 1 times [2022-11-18 20:20:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318261214] [2022-11-18 20:20:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:40,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:20:40,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979442425] [2022-11-18 20:20:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:40,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:40,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:40,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:40,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:20:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:42,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2592 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-18 20:20:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:44,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:20:45,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:45,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318261214] [2022-11-18 20:20:45,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:20:45,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979442425] [2022-11-18 20:20:45,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979442425] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:45,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:20:45,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 26 [2022-11-18 20:20:45,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632800592] [2022-11-18 20:20:45,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:45,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:20:45,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:45,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:20:45,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:20:45,639 INFO L87 Difference]: Start difference. First operand 825 states and 1363 transitions. Second operand has 13 states, 13 states have (on average 19.615384615384617) internal successors, (255), 13 states have internal predecessors, (255), 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) [2022-11-18 20:20:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:55,827 INFO L93 Difference]: Finished difference Result 3243 states and 5345 transitions. [2022-11-18 20:20:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 20:20:55,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.615384615384617) internal successors, (255), 13 states have internal predecessors, (255), 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 320 [2022-11-18 20:20:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:55,834 INFO L225 Difference]: With dead ends: 3243 [2022-11-18 20:20:55,834 INFO L226 Difference]: Without dead ends: 3241 [2022-11-18 20:20:55,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1081, Invalid=5399, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:20:55,839 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 16537 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 5662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16537 SdHoareTripleChecker+Valid, 2741 SdHoareTripleChecker+Invalid, 5676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:55,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16537 Valid, 2741 Invalid, 5676 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 5662 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-18 20:20:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2022-11-18 20:20:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 846. [2022-11-18 20:20:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.6544378698224853) internal successors, (1398), 845 states have internal predecessors, (1398), 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) [2022-11-18 20:20:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1398 transitions. [2022-11-18 20:20:55,876 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1398 transitions. Word has length 320 [2022-11-18 20:20:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:55,877 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1398 transitions. [2022-11-18 20:20:55,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.615384615384617) internal successors, (255), 13 states have internal predecessors, (255), 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) [2022-11-18 20:20:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1398 transitions. [2022-11-18 20:20:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-11-18 20:20:55,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:55,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:55,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:56,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:20:56,116 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:56,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:56,117 INFO L85 PathProgramCache]: Analyzing trace with hash 504982381, now seen corresponding path program 1 times [2022-11-18 20:20:56,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:56,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889625851] [2022-11-18 20:20:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:56,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:56,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:20:56,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942499816] [2022-11-18 20:20:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:56,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:56,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:56,216 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:56,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:20:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:57,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 2592 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 20:20:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:00,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:21:01,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:01,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889625851] [2022-11-18 20:21:01,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:21:01,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942499816] [2022-11-18 20:21:01,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942499816] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:01,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:21:01,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 25 [2022-11-18 20:21:01,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583279093] [2022-11-18 20:21:01,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:21:01,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:21:01,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:01,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:21:01,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:21:01,518 INFO L87 Difference]: Start difference. First operand 846 states and 1398 transitions. Second operand has 11 states, 11 states have (on average 23.181818181818183) internal successors, (255), 11 states have internal predecessors, (255), 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) [2022-11-18 20:21:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:21:07,753 INFO L93 Difference]: Finished difference Result 3282 states and 5417 transitions. [2022-11-18 20:21:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:21:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.181818181818183) internal successors, (255), 11 states have internal predecessors, (255), 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 320 [2022-11-18 20:21:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:21:07,756 INFO L225 Difference]: With dead ends: 3282 [2022-11-18 20:21:07,756 INFO L226 Difference]: Without dead ends: 2883 [2022-11-18 20:21:07,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=2694, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:21:07,759 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 6327 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 6927 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6327 SdHoareTripleChecker+Valid, 4775 SdHoareTripleChecker+Invalid, 6933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 6927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:21:07,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6327 Valid, 4775 Invalid, 6933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 6927 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-18 20:21:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-11-18 20:21:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 828. [2022-11-18 20:21:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.6541717049576783) internal successors, (1368), 827 states have internal predecessors, (1368), 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) [2022-11-18 20:21:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1368 transitions. [2022-11-18 20:21:07,786 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1368 transitions. Word has length 320 [2022-11-18 20:21:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:21:07,786 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1368 transitions. [2022-11-18 20:21:07,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.181818181818183) internal successors, (255), 11 states have internal predecessors, (255), 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) [2022-11-18 20:21:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1368 transitions. [2022-11-18 20:21:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-18 20:21:07,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:21:07,790 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:07,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:08,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:21:08,009 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:21:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1636067977, now seen corresponding path program 1 times [2022-11-18 20:21:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:08,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066004593] [2022-11-18 20:21:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:08,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:08,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:21:08,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539062967] [2022-11-18 20:21:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:08,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:08,089 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:08,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:21:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 20:21:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:10,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:21:12,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066004593] [2022-11-18 20:21:12,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:21:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539062967] [2022-11-18 20:21:12,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539062967] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:12,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:21:12,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 28 [2022-11-18 20:21:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247853598] [2022-11-18 20:21:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:21:12,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:21:12,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:21:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:21:12,452 INFO L87 Difference]: Start difference. First operand 828 states and 1368 transitions. Second operand has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 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) [2022-11-18 20:21:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:21:23,336 INFO L93 Difference]: Finished difference Result 3298 states and 5438 transitions. [2022-11-18 20:21:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:21:23,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 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 321 [2022-11-18 20:21:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:21:23,339 INFO L225 Difference]: With dead ends: 3298 [2022-11-18 20:21:23,339 INFO L226 Difference]: Without dead ends: 3296 [2022-11-18 20:21:23,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1401, Invalid=7155, Unknown=0, NotChecked=0, Total=8556 [2022-11-18 20:21:23,342 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 18869 mSDsluCounter, 2618 mSDsCounter, 0 mSdLazyCounter, 6213 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18869 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 6226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 6213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:21:23,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18869 Valid, 2955 Invalid, 6226 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 6213 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-18 20:21:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2022-11-18 20:21:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 852. [2022-11-18 20:21:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 1.654524089306698) internal successors, (1408), 851 states have internal predecessors, (1408), 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) [2022-11-18 20:21:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1408 transitions. [2022-11-18 20:21:23,365 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1408 transitions. Word has length 321 [2022-11-18 20:21:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:21:23,365 INFO L495 AbstractCegarLoop]: Abstraction has 852 states and 1408 transitions. [2022-11-18 20:21:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 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) [2022-11-18 20:21:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1408 transitions. [2022-11-18 20:21:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-18 20:21:23,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:21:23,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:23,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:23,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:23,586 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:21:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1636008395, now seen corresponding path program 1 times [2022-11-18 20:21:23,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:23,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572234803] [2022-11-18 20:21:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:23,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:23,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:21:23,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102799701] [2022-11-18 20:21:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:23,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:23,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:23,668 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:23,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:21:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:24,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:21:24,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:26,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:21:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572234803] [2022-11-18 20:21:27,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:21:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102799701] [2022-11-18 20:21:27,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102799701] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:27,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:21:27,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2022-11-18 20:21:27,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55923741] [2022-11-18 20:21:27,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:21:27,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:21:27,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:27,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:21:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:21:27,583 INFO L87 Difference]: Start difference. First operand 852 states and 1408 transitions. Second operand has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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) [2022-11-18 20:21:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:21:28,408 INFO L93 Difference]: Finished difference Result 2502 states and 4132 transitions. [2022-11-18 20:21:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:21:28,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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 321 [2022-11-18 20:21:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:21:28,411 INFO L225 Difference]: With dead ends: 2502 [2022-11-18 20:21:28,411 INFO L226 Difference]: Without dead ends: 2097 [2022-11-18 20:21:28,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 20:21:28,413 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 5737 mSDsluCounter, 6559 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5737 SdHoareTripleChecker+Valid, 7304 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:21:28,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5737 Valid, 7304 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:21:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2022-11-18 20:21:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 828. [2022-11-18 20:21:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.6541717049576783) internal successors, (1368), 827 states have internal predecessors, (1368), 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) [2022-11-18 20:21:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1368 transitions. [2022-11-18 20:21:28,435 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1368 transitions. Word has length 321 [2022-11-18 20:21:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:21:28,436 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1368 transitions. [2022-11-18 20:21:28,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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) [2022-11-18 20:21:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1368 transitions. [2022-11-18 20:21:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-18 20:21:28,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:21:28,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:28,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:28,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:28,656 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:21:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:28,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1845324843, now seen corresponding path program 1 times [2022-11-18 20:21:28,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:28,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110298833] [2022-11-18 20:21:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:28,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:21:28,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286195751] [2022-11-18 20:21:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:28,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:28,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:28,738 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:28,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:21:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-18 20:21:29,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:31,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-18 20:21:33,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110298833] [2022-11-18 20:21:33,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:21:33,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286195751] [2022-11-18 20:21:33,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286195751] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:33,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:21:33,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [17] total 30 [2022-11-18 20:21:33,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541096307] [2022-11-18 20:21:33,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:21:33,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:21:33,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:21:33,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:21:33,121 INFO L87 Difference]: Start difference. First operand 828 states and 1368 transitions. Second operand has 15 states, 15 states have (on average 17.4) internal successors, (261), 15 states have internal predecessors, (261), 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) [2022-11-18 20:21:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:21:43,784 INFO L93 Difference]: Finished difference Result 3290 states and 5429 transitions. [2022-11-18 20:21:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-18 20:21:43,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 17.4) internal successors, (261), 15 states have internal predecessors, (261), 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 322 [2022-11-18 20:21:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:21:43,787 INFO L225 Difference]: With dead ends: 3290 [2022-11-18 20:21:43,787 INFO L226 Difference]: Without dead ends: 3288 [2022-11-18 20:21:43,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 677 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1702, Invalid=8804, Unknown=0, NotChecked=0, Total=10506 [2022-11-18 20:21:43,791 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 21718 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 6654 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21718 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 6664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 6654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:21:43,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21718 Valid, 3109 Invalid, 6664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 6654 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-18 20:21:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2022-11-18 20:21:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 855. [2022-11-18 20:21:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.654566744730679) internal successors, (1413), 854 states have internal predecessors, (1413), 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) [2022-11-18 20:21:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1413 transitions. [2022-11-18 20:21:43,816 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1413 transitions. Word has length 322 [2022-11-18 20:21:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:21:43,817 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1413 transitions. [2022-11-18 20:21:43,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.4) internal successors, (261), 15 states have internal predecessors, (261), 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) [2022-11-18 20:21:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1413 transitions. [2022-11-18 20:21:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-18 20:21:43,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:21:43,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:43,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:44,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 20:21:44,036 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:21:44,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:44,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1845265261, now seen corresponding path program 1 times [2022-11-18 20:21:44,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:44,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625171347] [2022-11-18 20:21:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:44,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:44,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:21:44,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078359205] [2022-11-18 20:21:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:44,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:44,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:44,115 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:44,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:21:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 20:21:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:46,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-18 20:21:48,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:48,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625171347] [2022-11-18 20:21:48,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:21:48,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078359205] [2022-11-18 20:21:48,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078359205] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:48,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:21:48,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 24 [2022-11-18 20:21:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381369041] [2022-11-18 20:21:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:21:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:21:48,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:21:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:21:48,009 INFO L87 Difference]: Start difference. First operand 855 states and 1413 transitions. Second operand has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 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) [2022-11-18 20:21:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:21:49,005 INFO L93 Difference]: Finished difference Result 2559 states and 4227 transitions. [2022-11-18 20:21:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:21:49,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 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 322 [2022-11-18 20:21:49,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:21:49,016 INFO L225 Difference]: With dead ends: 2559 [2022-11-18 20:21:49,016 INFO L226 Difference]: Without dead ends: 2139 [2022-11-18 20:21:49,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:21:49,018 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 6339 mSDsluCounter, 7301 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6339 SdHoareTripleChecker+Valid, 8044 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:21:49,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6339 Valid, 8044 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:21:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2022-11-18 20:21:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 828. [2022-11-18 20:21:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.6541717049576783) internal successors, (1368), 827 states have internal predecessors, (1368), 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) [2022-11-18 20:21:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1368 transitions. [2022-11-18 20:21:49,035 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1368 transitions. Word has length 322 [2022-11-18 20:21:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:21:49,036 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1368 transitions. [2022-11-18 20:21:49,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 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) [2022-11-18 20:21:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1368 transitions. [2022-11-18 20:21:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-11-18 20:21:49,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:21:49,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:49,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:49,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:49,241 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:21:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:49,242 INFO L85 PathProgramCache]: Analyzing trace with hash -97915055, now seen corresponding path program 1 times [2022-11-18 20:21:49,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:49,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810782359] [2022-11-18 20:21:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:49,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:49,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:21:49,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326295911] [2022-11-18 20:21:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:49,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:49,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:49,318 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:49,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:21:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:21:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:52,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:55,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:55,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810782359] [2022-11-18 20:21:55,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:21:55,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326295911] [2022-11-18 20:21:55,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326295911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:55,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:21:55,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-18 20:21:55,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454617554] [2022-11-18 20:21:55,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:55,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:21:55,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:21:55,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:21:55,268 INFO L87 Difference]: Start difference. First operand 828 states and 1368 transitions. Second operand has 25 states, 25 states have (on average 25.76) internal successors, (644), 25 states have internal predecessors, (644), 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) [2022-11-18 20:22:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:22:26,578 INFO L93 Difference]: Finished difference Result 21108 states and 34856 transitions. [2022-11-18 20:22:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-11-18 20:22:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 25.76) internal successors, (644), 25 states have internal predecessors, (644), 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 323 [2022-11-18 20:22:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:22:26,596 INFO L225 Difference]: With dead ends: 21108 [2022-11-18 20:22:26,596 INFO L226 Difference]: Without dead ends: 20712 [2022-11-18 20:22:26,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25781 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=9954, Invalid=52796, Unknown=0, NotChecked=0, Total=62750 [2022-11-18 20:22:26,611 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 72536 mSDsluCounter, 4009 mSDsCounter, 0 mSdLazyCounter, 17973 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72536 SdHoareTripleChecker+Valid, 4180 SdHoareTripleChecker+Invalid, 18088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 17973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:22:26,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72536 Valid, 4180 Invalid, 18088 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [115 Valid, 17973 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2022-11-18 20:22:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20712 states. [2022-11-18 20:22:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20712 to 1499. [2022-11-18 20:22:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 1.6522029372496663) internal successors, (2475), 1498 states have internal predecessors, (2475), 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) [2022-11-18 20:22:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 2475 transitions. [2022-11-18 20:22:26,715 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 2475 transitions. Word has length 323 [2022-11-18 20:22:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:22:26,716 INFO L495 AbstractCegarLoop]: Abstraction has 1499 states and 2475 transitions. [2022-11-18 20:22:26,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 25.76) internal successors, (644), 25 states have internal predecessors, (644), 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) [2022-11-18 20:22:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 2475 transitions. [2022-11-18 20:22:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-11-18 20:22:26,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:22:26,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:22:26,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:22:26,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:26,944 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:22:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:22:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash 780521373, now seen corresponding path program 1 times [2022-11-18 20:22:26,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:22:26,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546754171] [2022-11-18 20:22:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:26,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:22:27,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:22:27,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030680741] [2022-11-18 20:22:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:27,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:27,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:27,027 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:27,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:22:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 20:22:28,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:30,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:34,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:34,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546754171] [2022-11-18 20:22:34,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:22:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030680741] [2022-11-18 20:22:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030680741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:22:34,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:22:34,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2022-11-18 20:22:34,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109850934] [2022-11-18 20:22:34,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:34,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 20:22:34,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 20:22:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:22:34,191 INFO L87 Difference]: Start difference. First operand 1499 states and 2475 transitions. Second operand has 31 states, 31 states have (on average 20.838709677419356) internal successors, (646), 31 states have internal predecessors, (646), 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) [2022-11-18 20:23:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:23:19,374 INFO L93 Difference]: Finished difference Result 42859 states and 70812 transitions. [2022-11-18 20:23:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 360 states. [2022-11-18 20:23:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 20.838709677419356) internal successors, (646), 31 states have internal predecessors, (646), 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 324 [2022-11-18 20:23:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:23:19,405 INFO L225 Difference]: With dead ends: 42859 [2022-11-18 20:23:19,405 INFO L226 Difference]: Without dead ends: 41788 [2022-11-18 20:23:19,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63405 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=20679, Invalid=127931, Unknown=0, NotChecked=0, Total=148610 [2022-11-18 20:23:19,421 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 117076 mSDsluCounter, 4054 mSDsCounter, 0 mSdLazyCounter, 18772 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117076 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 18927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 18772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:23:19,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117076 Valid, 4216 Invalid, 18927 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [155 Valid, 18772 Invalid, 0 Unknown, 0 Unchecked, 19.4s Time] [2022-11-18 20:23:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41788 states. [2022-11-18 20:23:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41788 to 1523. [2022-11-18 20:23:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 1.652431011826544) internal successors, (2515), 1522 states have internal predecessors, (2515), 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) [2022-11-18 20:23:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2515 transitions. [2022-11-18 20:23:19,604 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2515 transitions. Word has length 324 [2022-11-18 20:23:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:23:19,605 INFO L495 AbstractCegarLoop]: Abstraction has 1523 states and 2515 transitions. [2022-11-18 20:23:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 20.838709677419356) internal successors, (646), 31 states have internal predecessors, (646), 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) [2022-11-18 20:23:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2515 transitions. [2022-11-18 20:23:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-11-18 20:23:19,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:23:19,609 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:19,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:23:19,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 20:23:19,823 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:23:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash -516114887, now seen corresponding path program 1 times [2022-11-18 20:23:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:19,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228427369] [2022-11-18 20:23:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:19,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:19,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:23:19,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794884693] [2022-11-18 20:23:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:19,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:23:19,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:23:19,906 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:23:19,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:23:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-18 20:23:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:23:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:23,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:23:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:27,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:27,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228427369] [2022-11-18 20:23:27,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:23:27,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794884693] [2022-11-18 20:23:27,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794884693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:23:27,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:23:27,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-11-18 20:23:27,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235609529] [2022-11-18 20:23:27,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:23:27,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:23:27,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:27,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:23:27,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:23:27,928 INFO L87 Difference]: Start difference. First operand 1523 states and 2515 transitions. Second operand has 39 states, 39 states have (on average 16.615384615384617) internal successors, (648), 39 states have internal predecessors, (648), 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) [2022-11-18 20:26:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:09,826 INFO L93 Difference]: Finished difference Result 75569 states and 124786 transitions. [2022-11-18 20:26:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1020 states. [2022-11-18 20:26:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 16.615384615384617) internal successors, (648), 39 states have internal predecessors, (648), 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 325 [2022-11-18 20:26:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:09,894 INFO L225 Difference]: With dead ends: 75569 [2022-11-18 20:26:09,894 INFO L226 Difference]: Without dead ends: 74474 [2022-11-18 20:26:09,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1744 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 1052 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528761 ImplicationChecksByTransitivity, 109.0s TimeCoverageRelationStatistics Valid=117678, Invalid=992184, Unknown=0, NotChecked=0, Total=1109862 [2022-11-18 20:26:09,962 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 191852 mSDsluCounter, 6825 mSDsCounter, 0 mSdLazyCounter, 34730 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191852 SdHoareTripleChecker+Valid, 7081 SdHoareTripleChecker+Invalid, 34989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 34730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:09,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191852 Valid, 7081 Invalid, 34989 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [259 Valid, 34730 Invalid, 0 Unknown, 0 Unchecked, 41.6s Time] [2022-11-18 20:26:10,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74474 states. [2022-11-18 20:26:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74474 to 1553. [2022-11-18 20:26:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1552 states have (on average 1.6527061855670102) internal successors, (2565), 1552 states have internal predecessors, (2565), 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) [2022-11-18 20:26:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2565 transitions. [2022-11-18 20:26:10,259 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2565 transitions. Word has length 325 [2022-11-18 20:26:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:10,259 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 2565 transitions. [2022-11-18 20:26:10,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 16.615384615384617) internal successors, (648), 39 states have internal predecessors, (648), 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) [2022-11-18 20:26:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2565 transitions. [2022-11-18 20:26:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-18 20:26:10,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:10,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:10,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-18 20:26:10,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:26:10,465 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:10,466 INFO L85 PathProgramCache]: Analyzing trace with hash 888161949, now seen corresponding path program 1 times [2022-11-18 20:26:10,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:10,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676222507] [2022-11-18 20:26:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:10,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:10,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:26:10,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122321153] [2022-11-18 20:26:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:10,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:10,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:10,698 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:10,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:26:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-18 20:26:12,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:15,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:20,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:20,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676222507] [2022-11-18 20:26:20,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:26:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122321153] [2022-11-18 20:26:20,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122321153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:20,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:26:20,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-11-18 20:26:20,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933570125] [2022-11-18 20:26:20,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:20,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:26:20,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:26:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:26:20,094 INFO L87 Difference]: Start difference. First operand 1553 states and 2565 transitions. Second operand has 39 states, 39 states have (on average 16.666666666666668) internal successors, (650), 39 states have internal predecessors, (650), 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) [2022-11-18 20:28:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:21,582 INFO L93 Difference]: Finished difference Result 70126 states and 115921 transitions. [2022-11-18 20:28:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 683 states. [2022-11-18 20:28:21,583 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 16.666666666666668) internal successors, (650), 39 states have internal predecessors, (650), 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 326 [2022-11-18 20:28:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:21,638 INFO L225 Difference]: With dead ends: 70126 [2022-11-18 20:28:21,638 INFO L226 Difference]: Without dead ends: 69001 [2022-11-18 20:28:21,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 714 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230995 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=55809, Invalid=456131, Unknown=0, NotChecked=0, Total=511940 [2022-11-18 20:28:21,665 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 92149 mSDsluCounter, 10829 mSDsCounter, 0 mSdLazyCounter, 52348 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92149 SdHoareTripleChecker+Valid, 11166 SdHoareTripleChecker+Invalid, 52452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 52348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:21,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92149 Valid, 11166 Invalid, 52452 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [104 Valid, 52348 Invalid, 0 Unknown, 0 Unchecked, 49.3s Time] [2022-11-18 20:28:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69001 states. [2022-11-18 20:28:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69001 to 1553. [2022-11-18 20:28:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1552 states have (on average 1.6527061855670102) internal successors, (2565), 1552 states have internal predecessors, (2565), 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) [2022-11-18 20:28:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2565 transitions. [2022-11-18 20:28:21,908 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2565 transitions. Word has length 326 [2022-11-18 20:28:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:21,909 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 2565 transitions. [2022-11-18 20:28:21,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 16.666666666666668) internal successors, (650), 39 states have internal predecessors, (650), 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) [2022-11-18 20:28:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2565 transitions. [2022-11-18 20:28:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-11-18 20:28:21,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:21,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:21,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:22,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:28:22,119 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1805973201, now seen corresponding path program 1 times [2022-11-18 20:28:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24478207] [2022-11-18 20:28:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:22,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:22,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:22,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781821584] [2022-11-18 20:28:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:22,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:22,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:22,205 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:22,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:28:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:24,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-18 20:28:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:29,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:32,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24478207] [2022-11-18 20:28:32,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781821584] [2022-11-18 20:28:32,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781821584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:32,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:28:32,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2022-11-18 20:28:32,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849734399] [2022-11-18 20:28:32,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:32,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:28:32,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:28:32,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:28:32,750 INFO L87 Difference]: Start difference. First operand 1553 states and 2565 transitions. Second operand has 26 states, 26 states have (on average 25.076923076923077) internal successors, (652), 26 states have internal predecessors, (652), 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) [2022-11-18 20:29:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:08,752 INFO L93 Difference]: Finished difference Result 33963 states and 56185 transitions. [2022-11-18 20:29:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-18 20:29:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 25.076923076923077) internal successors, (652), 26 states have internal predecessors, (652), 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 327 [2022-11-18 20:29:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:08,776 INFO L225 Difference]: With dead ends: 33963 [2022-11-18 20:29:08,777 INFO L226 Difference]: Without dead ends: 32838 [2022-11-18 20:29:08,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4484 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2676, Invalid=9314, Unknown=0, NotChecked=0, Total=11990 [2022-11-18 20:29:08,781 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 49750 mSDsluCounter, 5078 mSDsCounter, 0 mSdLazyCounter, 20170 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49750 SdHoareTripleChecker+Valid, 5397 SdHoareTripleChecker+Invalid, 20273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 20170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:08,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49750 Valid, 5397 Invalid, 20273 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [103 Valid, 20170 Invalid, 0 Unknown, 0 Unchecked, 28.7s Time] [2022-11-18 20:29:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32838 states. [2022-11-18 20:29:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32838 to 3660. [2022-11-18 20:29:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3660 states, 3659 states have (on average 1.654550423613009) internal successors, (6054), 3659 states have internal predecessors, (6054), 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) [2022-11-18 20:29:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3660 states to 3660 states and 6054 transitions. [2022-11-18 20:29:08,934 INFO L78 Accepts]: Start accepts. Automaton has 3660 states and 6054 transitions. Word has length 327 [2022-11-18 20:29:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:08,935 INFO L495 AbstractCegarLoop]: Abstraction has 3660 states and 6054 transitions. [2022-11-18 20:29:08,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 25.076923076923077) internal successors, (652), 26 states have internal predecessors, (652), 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) [2022-11-18 20:29:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3660 states and 6054 transitions. [2022-11-18 20:29:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-11-18 20:29:08,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:08,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:08,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-18 20:29:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:29:09,155 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:09,159 INFO L85 PathProgramCache]: Analyzing trace with hash 878692865, now seen corresponding path program 1 times [2022-11-18 20:29:09,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:09,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375171792] [2022-11-18 20:29:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:09,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:29:09,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296448990] [2022-11-18 20:29:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:09,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:09,251 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:09,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:29:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2616 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-18 20:29:11,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:16,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:20,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:20,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375171792] [2022-11-18 20:29:20,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:29:20,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296448990] [2022-11-18 20:29:20,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296448990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:20,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:29:20,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2022-11-18 20:29:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867164072] [2022-11-18 20:29:20,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:20,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:29:20,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:20,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:29:20,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:29:20,229 INFO L87 Difference]: Start difference. First operand 3660 states and 6054 transitions. Second operand has 27 states, 27 states have (on average 24.22222222222222) internal successors, (654), 27 states have internal predecessors, (654), 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) [2022-11-18 20:30:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:23,744 INFO L93 Difference]: Finished difference Result 105926 states and 175129 transitions. [2022-11-18 20:30:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-11-18 20:30:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 24.22222222222222) internal successors, (654), 27 states have internal predecessors, (654), 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 328 [2022-11-18 20:30:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:23,820 INFO L225 Difference]: With dead ends: 105926 [2022-11-18 20:30:23,820 INFO L226 Difference]: Without dead ends: 103645 [2022-11-18 20:30:23,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19588 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=8592, Invalid=38280, Unknown=0, NotChecked=0, Total=46872 [2022-11-18 20:30:23,837 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 57977 mSDsluCounter, 8125 mSDsCounter, 0 mSdLazyCounter, 37056 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57977 SdHoareTripleChecker+Valid, 8657 SdHoareTripleChecker+Invalid, 37195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 37056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:23,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57977 Valid, 8657 Invalid, 37195 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [139 Valid, 37056 Invalid, 0 Unknown, 0 Unchecked, 43.5s Time] [2022-11-18 20:30:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103645 states. [2022-11-18 20:30:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103645 to 3698. [2022-11-18 20:30:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3697 states have (on average 1.6545847984852584) internal successors, (6117), 3697 states have internal predecessors, (6117), 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) [2022-11-18 20:30:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 6117 transitions. [2022-11-18 20:30:24,413 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 6117 transitions. Word has length 328 [2022-11-18 20:30:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:24,413 INFO L495 AbstractCegarLoop]: Abstraction has 3698 states and 6117 transitions. [2022-11-18 20:30:24,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 24.22222222222222) internal successors, (654), 27 states have internal predecessors, (654), 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) [2022-11-18 20:30:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 6117 transitions. [2022-11-18 20:30:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-18 20:30:24,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:24,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:24,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:30:24,633 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1499585901, now seen corresponding path program 1 times [2022-11-18 20:30:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:24,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008807695] [2022-11-18 20:30:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:24,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:30:24,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151748258] [2022-11-18 20:30:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:24,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:24,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:24,717 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:24,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:30:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-18 20:30:26,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:33,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:37,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:37,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008807695] [2022-11-18 20:30:37,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:30:37,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151748258] [2022-11-18 20:30:37,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151748258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:37,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:30:37,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-11-18 20:30:37,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075417064] [2022-11-18 20:30:37,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:37,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:30:37,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:30:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:30:37,258 INFO L87 Difference]: Start difference. First operand 3698 states and 6117 transitions. Second operand has 27 states, 27 states have (on average 24.296296296296298) internal successors, (656), 27 states have internal predecessors, (656), 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) [2022-11-18 20:31:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:16,376 INFO L93 Difference]: Finished difference Result 65890 states and 109094 transitions. [2022-11-18 20:31:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-18 20:31:16,377 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 24.296296296296298) internal successors, (656), 27 states have internal predecessors, (656), 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 329 [2022-11-18 20:31:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:16,426 INFO L225 Difference]: With dead ends: 65890 [2022-11-18 20:31:16,427 INFO L226 Difference]: Without dead ends: 63582 [2022-11-18 20:31:16,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5065 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3044, Invalid=10998, Unknown=0, NotChecked=0, Total=14042 [2022-11-18 20:31:16,438 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 52544 mSDsluCounter, 5902 mSDsCounter, 0 mSdLazyCounter, 25518 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52544 SdHoareTripleChecker+Valid, 6368 SdHoareTripleChecker+Invalid, 25589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 25518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:16,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52544 Valid, 6368 Invalid, 25589 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [71 Valid, 25518 Invalid, 0 Unknown, 0 Unchecked, 31.2s Time] [2022-11-18 20:31:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63582 states. [2022-11-18 20:31:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63582 to 5285. [2022-11-18 20:31:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5284 states have (on average 1.6534822104466314) internal successors, (8737), 5284 states have internal predecessors, (8737), 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) [2022-11-18 20:31:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 8737 transitions. [2022-11-18 20:31:16,742 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 8737 transitions. Word has length 329 [2022-11-18 20:31:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:16,743 INFO L495 AbstractCegarLoop]: Abstraction has 5285 states and 8737 transitions. [2022-11-18 20:31:16,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 24.296296296296298) internal successors, (656), 27 states have internal predecessors, (656), 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) [2022-11-18 20:31:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 8737 transitions. [2022-11-18 20:31:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-18 20:31:16,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:16,751 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:16,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:16,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:31:16,971 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -566535745, now seen corresponding path program 1 times [2022-11-18 20:31:16,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:16,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129200399] [2022-11-18 20:31:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:16,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:17,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:17,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990015473] [2022-11-18 20:31:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:17,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:17,068 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:17,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:31:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:19,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-18 20:31:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:22,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:22,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:22,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129200399] [2022-11-18 20:31:22,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:22,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990015473] [2022-11-18 20:31:22,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990015473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:22,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:22,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 20:31:22,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227004894] [2022-11-18 20:31:22,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:22,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:31:22,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:22,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:31:22,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:31:22,398 INFO L87 Difference]: Start difference. First operand 5285 states and 8737 transitions. Second operand has 13 states, 13 states have (on average 25.384615384615383) internal successors, (330), 13 states have internal predecessors, (330), 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) [2022-11-18 20:31:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:37,505 INFO L93 Difference]: Finished difference Result 26643 states and 44017 transitions. [2022-11-18 20:31:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:31:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 25.384615384615383) internal successors, (330), 13 states have internal predecessors, (330), 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 330 [2022-11-18 20:31:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:37,522 INFO L225 Difference]: With dead ends: 26643 [2022-11-18 20:31:37,522 INFO L226 Difference]: Without dead ends: 24177 [2022-11-18 20:31:37,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:31:37,528 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 7427 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 13535 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7427 SdHoareTripleChecker+Valid, 3190 SdHoareTripleChecker+Invalid, 13546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:37,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7427 Valid, 3190 Invalid, 13546 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 13535 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-11-18 20:31:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24177 states. [2022-11-18 20:31:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24177 to 6507. [2022-11-18 20:31:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 1.6507838917921918) internal successors, (10740), 6506 states have internal predecessors, (10740), 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) [2022-11-18 20:31:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 10740 transitions. [2022-11-18 20:31:37,704 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 10740 transitions. Word has length 330 [2022-11-18 20:31:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:37,704 INFO L495 AbstractCegarLoop]: Abstraction has 6507 states and 10740 transitions. [2022-11-18 20:31:37,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.384615384615383) internal successors, (330), 13 states have internal predecessors, (330), 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) [2022-11-18 20:31:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 10740 transitions. [2022-11-18 20:31:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-18 20:31:37,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:37,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:37,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-18 20:31:37,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:37,927 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash -361581759, now seen corresponding path program 1 times [2022-11-18 20:31:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:37,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058191698] [2022-11-18 20:31:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:37,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:38,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:38,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999341438] [2022-11-18 20:31:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:38,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:38,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:38,019 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:38,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d36479-e8a7-4dfc-a21f-e55b35041536/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:31:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-18 20:31:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates...