./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.6.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.6.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc --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 faaf34901f5f5a211f3b74681e433b190577835ce59b610133b3e6a3d516daae --- 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-5e519f3 [2022-11-02 21:12:21,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:12:21,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:12:21,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:12:21,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:12:21,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:12:21,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:12:21,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:12:21,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:12:21,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:12:21,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:12:21,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:12:21,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:12:21,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:12:21,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:12:21,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:12:21,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:12:21,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:12:21,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:12:21,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:12:21,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:12:21,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:12:21,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:12:21,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:12:21,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:12:21,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:12:21,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:12:21,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:12:21,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:12:21,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:12:21,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:12:21,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:12:21,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:12:21,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:12:21,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:12:21,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:12:21,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:12:21,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:12:21,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:12:21,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:12:21,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:12:21,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 21:12:21,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:12:21,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:12:21,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:12:21,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:12:21,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:12:21,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:12:21,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:12:21,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:12:21,475 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:12:21,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:12:21,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:12:21,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:12:21,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:12:21,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:12:21,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:12:21,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:12:21,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:12:21,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:12:21,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:12:21,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:12:21,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:12:21,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:12:21,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:12:21,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:12:21,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:12:21,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:12:21,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:12:21,482 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:12:21,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:12:21,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:12:21,483 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_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faaf34901f5f5a211f3b74681e433b190577835ce59b610133b3e6a3d516daae [2022-11-02 21:12:21,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:12:21,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:12:21,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:12:21,882 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:12:21,882 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:12:21,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.6.prop1-back-serstep.c [2022-11-02 21:12:21,979 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/data/da58e89ee/72bfc38a407f44208497cfb499db2263/FLAG68e8b58d9 [2022-11-02 21:12:22,733 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:12:22,733 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.6.prop1-back-serstep.c [2022-11-02 21:12:22,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/data/da58e89ee/72bfc38a407f44208497cfb499db2263/FLAG68e8b58d9 [2022-11-02 21:12:22,840 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/data/da58e89ee/72bfc38a407f44208497cfb499db2263 [2022-11-02 21:12:22,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:12:22,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:12:22,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:12:22,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:12:22,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:12:22,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:12:22" (1/1) ... [2022-11-02 21:12:22,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b6b5bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:22, skipping insertion in model container [2022-11-02 21:12:22,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:12:22" (1/1) ... [2022-11-02 21:12:22,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:12:22,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:12:23,207 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.6.prop1-back-serstep.c[1014,1027] [2022-11-02 21:12:23,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:12:23,822 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:12:23,835 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.anderson.6.prop1-back-serstep.c[1014,1027] [2022-11-02 21:12:24,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:12:24,152 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:12:24,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24 WrapperNode [2022-11-02 21:12:24,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:12:24,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:12:24,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:12:24,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:12:24,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:24,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:24,889 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 4225 [2022-11-02 21:12:24,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:12:24,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:12:24,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:12:24,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:12:24,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:24,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:25,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:25,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:25,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:25,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:25,364 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:25,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:25,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:12:25,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:12:25,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:12:25,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:12:25,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (1/1) ... [2022-11-02 21:12:25,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:12:25,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:25,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:12:25,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:12:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:12:25,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:12:26,504 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:12:26,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:14:18,216 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:14:18,228 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:14:18,228 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:14:18,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:14:18 BoogieIcfgContainer [2022-11-02 21:14:18,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:14:18,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:14:18,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:14:18,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:14:18,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:12:22" (1/3) ... [2022-11-02 21:14:18,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2d29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:14:18, skipping insertion in model container [2022-11-02 21:14:18,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:12:24" (2/3) ... [2022-11-02 21:14:18,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2d29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:14:18, skipping insertion in model container [2022-11-02 21:14:18,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:14:18" (3/3) ... [2022-11-02 21:14:18,240 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.anderson.6.prop1-back-serstep.c [2022-11-02 21:14:18,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:14:18,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:14:18,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:14:18,338 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;@4447fd6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:14:18,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:14:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 323 states have (on average 1.498452012383901) internal successors, (484), 324 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:14:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 21:14:18,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:14:18,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 21:14:18,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:14:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:14:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 21:14:18,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:14:18,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44348539] [2022-11-02 21:14:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:18,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:14:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:14:29,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:14:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44348539] [2022-11-02 21:14:29,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44348539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:14:29,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:14:29,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:14:29,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659241917] [2022-11-02 21:14:29,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:14:29,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:14:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:14:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:14:29,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:14:29,822 INFO L87 Difference]: Start difference. First operand has 325 states, 323 states have (on average 1.498452012383901) internal successors, (484), 324 states have internal predecessors, (484), 0 states have call successors, (0), 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 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:14:31,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 21:14:33,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 21:14:35,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 21:14:37,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 21:14:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:14:37,988 INFO L93 Difference]: Finished difference Result 947 states and 1419 transitions. [2022-11-02 21:14:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:14:38,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-02 21:14:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:14:38,016 INFO L225 Difference]: With dead ends: 947 [2022-11-02 21:14:38,016 INFO L226 Difference]: Without dead ends: 624 [2022-11-02 21:14:38,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:14:38,024 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1353 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:14:38,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1353 Valid, 973 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2022-11-02 21:14:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-11-02 21:14:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 323. [2022-11-02 21:14:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.4906832298136645) internal successors, (480), 322 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:14:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 480 transitions. [2022-11-02 21:14:38,083 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 480 transitions. Word has length 5 [2022-11-02 21:14:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:14:38,084 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 480 transitions. [2022-11-02 21:14:38,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:14:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 480 transitions. [2022-11-02 21:14:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-02 21:14:38,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:14:38,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:14:38,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:14:38,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:14:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:14:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 970165303, now seen corresponding path program 1 times [2022-11-02 21:14:38,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:14:38,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357582990] [2022-11-02 21:14:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:14:38,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:14:38,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683998171] [2022-11-02 21:14:38,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:38,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:14:38,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:14:38,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:14:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 7028 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 21:14:42,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:14:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:14:52,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:14:52,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:14:52,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357582990] [2022-11-02 21:14:52,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:14:52,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683998171] [2022-11-02 21:14:52,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683998171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:14:52,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:14:52,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:14:52,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847944896] [2022-11-02 21:14:52,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:14:52,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:14:52,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:14:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:14:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:14:52,175 INFO L87 Difference]: Start difference. First operand 323 states and 480 transitions. Second operand has 10 states, 10 states have (on average 32.2) internal successors, (322), 10 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:14:54,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 21:14:57,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 21:14:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:14:58,772 INFO L93 Difference]: Finished difference Result 1274 states and 1901 transitions. [2022-11-02 21:14:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:14:58,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 32.2) internal successors, (322), 10 states have internal predecessors, (322), 0 states have call successors, (0), 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 [2022-11-02 21:14:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:14:58,779 INFO L225 Difference]: With dead ends: 1274 [2022-11-02 21:14:58,779 INFO L226 Difference]: Without dead ends: 955 [2022-11-02 21:14:58,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:14:58,782 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 1439 mSDsluCounter, 2684 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 3620 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:14:58,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 3620 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-02 21:14:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-11-02 21:14:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 637. [2022-11-02 21:14:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 1.4937106918238994) internal successors, (950), 636 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:14:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 950 transitions. [2022-11-02 21:14:58,814 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 950 transitions. Word has length 322 [2022-11-02 21:14:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:14:58,815 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 950 transitions. [2022-11-02 21:14:58,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.2) internal successors, (322), 10 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:14:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 950 transitions. [2022-11-02 21:14:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-02 21:14:58,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:14:58,821 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:14:58,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 21:14:59,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:59,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:14:59,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:14:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash 972012345, now seen corresponding path program 1 times [2022-11-02 21:14:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:14:59,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7039366] [2022-11-02 21:14:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:59,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:14:59,468 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:14:59,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540633010] [2022-11-02 21:14:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:59,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:59,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:14:59,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:14:59,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd47693-aeba-4443-8b63-f0f669afaeee/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:15:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:15:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 7029 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 21:15:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates...