./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/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_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/pcomp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/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 32bit --witnessprinter.graph.data.programhash 1472da9c0a8f011e4f758f37d66a1227b497d4a96142a431b3f2f304a275b1b7 --- 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 20:36:59,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:36:59,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:36:59,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:36:59,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:36:59,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:36:59,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:36:59,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:36:59,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:36:59,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:36:59,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:36:59,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:36:59,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:36:59,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:36:59,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:36:59,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:36:59,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:36:59,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:36:59,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:36:59,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:36:59,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:36:59,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:36:59,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:36:59,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:36:59,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:36:59,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:36:59,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:36:59,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:36:59,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:36:59,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:36:59,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:36:59,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:36:59,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:36:59,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:36:59,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:36:59,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:36:59,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:36:59,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:36:59,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:36:59,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:36:59,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:36:59,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:36:59,455 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:36:59,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:36:59,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:36:59,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:36:59,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:36:59,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:36:59,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:36:59,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:36:59,460 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:36:59,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:36:59,461 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:36:59,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:36:59,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:36:59,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:36:59,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:36:59,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:36:59,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:36:59,463 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:36:59,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:36:59,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:36:59,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:36:59,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:36:59,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:36:59,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:36:59,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:59,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:36:59,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:36:59,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:36:59,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:36:59,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:36:59,468 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:36:59,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:36:59,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:36:59,468 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_95d09485-fa33-4c31-8396-70541dcbf59f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1472da9c0a8f011e4f758f37d66a1227b497d4a96142a431b3f2f304a275b1b7 [2022-11-02 20:36:59,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:36:59,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:36:59,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:36:59,808 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:36:59,809 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:36:59,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-fpi/pcomp.c [2022-11-02 20:36:59,890 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/data/42b95579d/62044cf937aa41348f1206dadafb487b/FLAGe1eedd5a6 [2022-11-02 20:37:00,438 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:37:00,440 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/sv-benchmarks/c/array-fpi/pcomp.c [2022-11-02 20:37:00,452 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/data/42b95579d/62044cf937aa41348f1206dadafb487b/FLAGe1eedd5a6 [2022-11-02 20:37:00,788 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/data/42b95579d/62044cf937aa41348f1206dadafb487b [2022-11-02 20:37:00,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:37:00,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:37:00,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:37:00,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:37:00,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:37:00,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:37:00" (1/1) ... [2022-11-02 20:37:00,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ec7e21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:00, skipping insertion in model container [2022-11-02 20:37:00,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:37:00" (1/1) ... [2022-11-02 20:37:00,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:37:00,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:37:01,026 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_95d09485-fa33-4c31-8396-70541dcbf59f/sv-benchmarks/c/array-fpi/pcomp.c[588,601] [2022-11-02 20:37:01,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:37:01,057 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:37:01,069 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_95d09485-fa33-4c31-8396-70541dcbf59f/sv-benchmarks/c/array-fpi/pcomp.c[588,601] [2022-11-02 20:37:01,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:37:01,092 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:37:01,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01 WrapperNode [2022-11-02 20:37:01,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:37:01,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:37:01,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:37:01,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:37:01,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,130 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-11-02 20:37:01,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:37:01,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:37:01,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:37:01,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:37:01,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,156 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:37:01,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:37:01,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:37:01,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:37:01,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2022-11-02 20:37:01,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:37:01,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:01,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:37:01,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:37:01,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:37:01,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:37:01,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:37:01,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:37:01,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:37:01,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:37:01,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:37:01,366 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:37:01,383 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:37:01,637 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:37:01,643 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:37:01,644 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:37:01,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:37:01 BoogieIcfgContainer [2022-11-02 20:37:01,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:37:01,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:37:01,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:37:01,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:37:01,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:37:00" (1/3) ... [2022-11-02 20:37:01,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138963e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:37:01, skipping insertion in model container [2022-11-02 20:37:01,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (2/3) ... [2022-11-02 20:37:01,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138963e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:37:01, skipping insertion in model container [2022-11-02 20:37:01,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:37:01" (3/3) ... [2022-11-02 20:37:01,655 INFO L112 eAbstractionObserver]: Analyzing ICFG pcomp.c [2022-11-02 20:37:01,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:37:01,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:37:01,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:37:01,773 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;@605f6fad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:37:01,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:37:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:37:01,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:01,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:01,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2022-11-02 20:37:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:01,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604945638] [2022-11-02 20:37:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:01,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:02,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:02,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604945638] [2022-11-02 20:37:02,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:37:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148474912] [2022-11-02 20:37:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:02,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:02,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:02,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:02,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:37:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:02,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:37:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:02,207 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 20:37:02,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:37:02,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148474912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:37:02,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:37:02,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:37:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814894459] [2022-11-02 20:37:02,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:37:02,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:37:02,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:02,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:37:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:37:02,255 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:02,277 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-11-02 20:37:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:37:02,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 20:37:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:02,305 INFO L225 Difference]: With dead ends: 44 [2022-11-02 20:37:02,306 INFO L226 Difference]: Without dead ends: 20 [2022-11-02 20:37:02,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:37:02,315 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:02,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:37:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-02 20:37:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-02 20:37:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 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 20:37:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-02 20:37:02,360 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-11-02 20:37:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:02,361 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-02 20:37:02,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-02 20:37:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:37:02,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:02,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:02,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:02,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 20:37:02,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:02,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2022-11-02 20:37:02,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:02,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603191504] [2022-11-02 20:37:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:02,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:02,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:02,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53322286] [2022-11-02 20:37:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:02,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:02,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:02,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:02,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:37:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:37:02,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:03,057 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-02 20:37:03,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-11-02 20:37:03,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:03,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:03,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:04,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:37:04,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:04,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-11-02 20:37:04,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:37:04,146 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-02 20:37:04,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 57 [2022-11-02 20:37:04,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:37:04,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-02 20:37:04,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:37:04,350 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 20:37:04,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:37:04,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:04,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603191504] [2022-11-02 20:37:04,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:04,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53322286] [2022-11-02 20:37:04,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53322286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:37:04,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:37:04,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:37:04,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536481669] [2022-11-02 20:37:04,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:37:04,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:37:04,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:37:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:37:04,360 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:04,487 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-02 20:37:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:37:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 20:37:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:04,489 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:37:04,489 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 20:37:04,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:37:04,491 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:04,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 65 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:37:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 20:37:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-11-02 20:37:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-02 20:37:04,499 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2022-11-02 20:37:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:04,499 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-02 20:37:04,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-02 20:37:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:37:04,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:04,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:04,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:04,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:04,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:04,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:04,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1850906398, now seen corresponding path program 1 times [2022-11-02 20:37:04,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:04,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182657250] [2022-11-02 20:37:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:04,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:04,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:04,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343194242] [2022-11-02 20:37:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:04,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:04,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:04,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:37:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:37:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:04,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:37:04,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:04,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182657250] [2022-11-02 20:37:04,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:04,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343194242] [2022-11-02 20:37:04,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343194242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:37:04,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:37:04,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:37:04,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788631628] [2022-11-02 20:37:04,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:37:04,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:37:04,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:04,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:37:04,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:37:04,898 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:37:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:05,018 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-11-02 20:37:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:37:05,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-02 20:37:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:05,019 INFO L225 Difference]: With dead ends: 62 [2022-11-02 20:37:05,020 INFO L226 Difference]: Without dead ends: 50 [2022-11-02 20:37:05,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:37:05,021 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:05,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:37:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-02 20:37:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2022-11-02 20:37:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 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 20:37:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-02 20:37:05,028 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2022-11-02 20:37:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:05,028 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-02 20:37:05,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:37:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-02 20:37:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:37:05,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:05,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:05,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:05,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 20:37:05,258 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:05,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1060218526, now seen corresponding path program 1 times [2022-11-02 20:37:05,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:05,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302402799] [2022-11-02 20:37:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:05,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:05,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:05,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233791388] [2022-11-02 20:37:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:05,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:05,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:05,315 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:05,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:37:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:05,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:37:05,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:05,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:05,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:05,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302402799] [2022-11-02 20:37:05,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:05,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233791388] [2022-11-02 20:37:05,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233791388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:05,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:05,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-02 20:37:05,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069302100] [2022-11-02 20:37:05,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:05,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:37:05,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:37:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:37:05,460 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:05,599 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-11-02 20:37:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:37:05,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:37:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:05,601 INFO L225 Difference]: With dead ends: 53 [2022-11-02 20:37:05,601 INFO L226 Difference]: Without dead ends: 44 [2022-11-02 20:37:05,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:37:05,603 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:05,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 44 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:37:05,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-02 20:37:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-11-02 20:37:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-02 20:37:05,609 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2022-11-02 20:37:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:05,610 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-02 20:37:05,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-02 20:37:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:37:05,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:05,611 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:05,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:05,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:05,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1120615462, now seen corresponding path program 1 times [2022-11-02 20:37:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:05,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109053288] [2022-11-02 20:37:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:05,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:05,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139847168] [2022-11-02 20:37:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:05,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:05,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:05,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:37:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:37:05,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:06,031 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 20:37:06,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:37:06,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109053288] [2022-11-02 20:37:06,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:06,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139847168] [2022-11-02 20:37:06,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139847168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:37:06,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:37:06,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:37:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021428485] [2022-11-02 20:37:06,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:37:06,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:37:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:37:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:37:06,037 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:06,206 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-11-02 20:37:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:37:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:37:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:06,207 INFO L225 Difference]: With dead ends: 48 [2022-11-02 20:37:06,208 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 20:37:06,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:37:06,209 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:06,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:37:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 20:37:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-11-02 20:37:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 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 20:37:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-02 20:37:06,214 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2022-11-02 20:37:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:06,214 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-02 20:37:06,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-02 20:37:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:37:06,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:06,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:06,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:06,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:06,430 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2022-11-02 20:37:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:06,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395515422] [2022-11-02 20:37:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:06,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:06,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:06,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549362108] [2022-11-02 20:37:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:06,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:06,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:06,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:06,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:37:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:06,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:37:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:06,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-02 20:37:06,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:06,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:06,706 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:37:06,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-02 20:37:06,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:06,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:37:06,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:37:06,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:37:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:06,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:07,044 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_313) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2022-11-02 20:37:07,064 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_313 (Array Int Int)) (v_ArrVal_312 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_312) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_313) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2022-11-02 20:37:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-02 20:37:07,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:07,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395515422] [2022-11-02 20:37:07,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:07,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549362108] [2022-11-02 20:37:07,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549362108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:07,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:07,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-11-02 20:37:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816901759] [2022-11-02 20:37:07,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:37:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:37:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=67, Unknown=2, NotChecked=34, Total=132 [2022-11-02 20:37:07,104 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 20:37:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:07,339 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-11-02 20:37:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:37:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 20 [2022-11-02 20:37:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:07,341 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:37:07,341 INFO L226 Difference]: Without dead ends: 44 [2022-11-02 20:37:07,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=127, Unknown=2, NotChecked=50, Total=240 [2022-11-02 20:37:07,342 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:07,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 105 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 71 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-02 20:37:07,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-02 20:37:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2022-11-02 20:37:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:37:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-02 20:37:07,347 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-11-02 20:37:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:07,348 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-02 20:37:07,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 20:37:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-02 20:37:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:37:07,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:07,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:07,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:07,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:37:07,550 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:07,551 INFO L85 PathProgramCache]: Analyzing trace with hash 859342364, now seen corresponding path program 2 times [2022-11-02 20:37:07,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:07,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366407100] [2022-11-02 20:37:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:07,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:07,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:07,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260721579] [2022-11-02 20:37:07,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:37:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:07,613 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:07,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:37:07,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:37:07,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:37:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:37:07,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:37:07,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:07,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366407100] [2022-11-02 20:37:07,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:07,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260721579] [2022-11-02 20:37:07,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260721579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:07,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:07,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-02 20:37:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280640823] [2022-11-02 20:37:07,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:07,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:37:07,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:37:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:37:07,826 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 20:37:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:08,033 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-11-02 20:37:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:37:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 22 [2022-11-02 20:37:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:08,035 INFO L225 Difference]: With dead ends: 81 [2022-11-02 20:37:08,035 INFO L226 Difference]: Without dead ends: 63 [2022-11-02 20:37:08,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:37:08,036 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:08,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:37:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-02 20:37:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2022-11-02 20:37:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-02 20:37:08,044 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 22 [2022-11-02 20:37:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:08,045 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-02 20:37:08,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 20:37:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-02 20:37:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:37:08,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:08,046 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] [2022-11-02 20:37:08,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:08,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:08,261 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:08,262 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2022-11-02 20:37:08,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:08,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969297797] [2022-11-02 20:37:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:08,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:08,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:08,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365760904] [2022-11-02 20:37:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:08,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:08,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:08,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:08,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:37:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:08,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 20:37:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:08,549 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:08,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-02 20:37:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:08,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:08,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:08,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-02 20:37:08,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:08,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:08,616 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:08,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-02 20:37:08,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:08,701 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:08,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-02 20:37:08,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:08,761 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:08,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-11-02 20:37:08,927 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:37:08,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2022-11-02 20:37:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:08,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:09,639 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_447 (Array Int Int)) (v_ArrVal_448 Int)) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_447))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse1 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_448)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|)))) 1)) is different from false [2022-11-02 20:37:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-02 20:37:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969297797] [2022-11-02 20:37:09,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365760904] [2022-11-02 20:37:09,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365760904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:09,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:09,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2022-11-02 20:37:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549953023] [2022-11-02 20:37:09,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:09,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:37:09,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:37:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2022-11-02 20:37:09,661 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 20:37:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:09,921 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-02 20:37:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:37:09,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 20:37:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:09,923 INFO L225 Difference]: With dead ends: 62 [2022-11-02 20:37:09,923 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 20:37:09,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=315, Unknown=1, NotChecked=38, Total=462 [2022-11-02 20:37:09,924 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:09,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 170 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-11-02 20:37:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 20:37:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2022-11-02 20:37:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 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 20:37:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-02 20:37:09,933 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 24 [2022-11-02 20:37:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:09,934 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-02 20:37:09,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 20:37:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-02 20:37:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:37:09,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:09,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:09,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:10,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:10,135 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash -404894190, now seen corresponding path program 2 times [2022-11-02 20:37:10,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:10,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612542142] [2022-11-02 20:37:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:10,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:10,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:10,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803954841] [2022-11-02 20:37:10,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:37:10,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:10,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:10,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:10,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:37:10,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:37:10,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:37:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:37:10,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:37:10,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:10,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612542142] [2022-11-02 20:37:10,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:10,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803954841] [2022-11-02 20:37:10,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803954841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:10,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:10,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-02 20:37:10,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188479652] [2022-11-02 20:37:10,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:10,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:37:10,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:37:10,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:37:10,473 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 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 20:37:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:10,725 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2022-11-02 20:37:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:37:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 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 26 [2022-11-02 20:37:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:10,727 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:37:10,727 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:37:10,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:37:10,728 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:10,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 54 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:37:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:37:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2022-11-02 20:37:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 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 20:37:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-02 20:37:10,735 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2022-11-02 20:37:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:10,736 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-02 20:37:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 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 20:37:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-02 20:37:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:37:10,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:10,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:10,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:37:10,947 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 3 times [2022-11-02 20:37:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:10,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047315740] [2022-11-02 20:37:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:11,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:11,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279746213] [2022-11-02 20:37:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:37:11,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:11,030 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:11,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:37:11,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:37:11,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:11,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 20:37:11,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:11,604 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-02 20:37:11,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-11-02 20:37:11,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:11,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:11,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:11,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:11,941 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-02 20:37:11,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 84 [2022-11-02 20:37:11,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:37:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:12,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:12,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:12,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 36 [2022-11-02 20:37:12,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:37:12,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:37:12,110 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-02 20:37:12,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 16 [2022-11-02 20:37:12,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:37:12,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-02 20:37:12,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:37:12,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:37:12,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:37:12,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:37:12,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-11-02 20:37:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:12,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2022-11-02 20:37:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:12,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 24 [2022-11-02 20:37:12,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:12,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:37:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:37:12,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:12,995 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_596 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_596) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) is different from false [2022-11-02 20:37:13,020 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_594 (Array Int Int)) (v_ArrVal_596 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_594) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_596) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) is different from false [2022-11-02 20:37:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-11-02 20:37:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:13,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047315740] [2022-11-02 20:37:13,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:13,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279746213] [2022-11-02 20:37:13,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279746213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:13,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:13,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-11-02 20:37:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419060781] [2022-11-02 20:37:13,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:37:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:37:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=134, Unknown=2, NotChecked=50, Total=240 [2022-11-02 20:37:13,049 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:13,646 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-11-02 20:37:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:37:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 20:37:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:13,647 INFO L225 Difference]: With dead ends: 99 [2022-11-02 20:37:13,647 INFO L226 Difference]: Without dead ends: 97 [2022-11-02 20:37:13,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=569, Unknown=2, NotChecked=106, Total=870 [2022-11-02 20:37:13,649 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:13,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 120 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 101 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-11-02 20:37:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-02 20:37:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 49. [2022-11-02 20:37:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 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 20:37:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-02 20:37:13,659 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 26 [2022-11-02 20:37:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:13,660 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-02 20:37:13,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-02 20:37:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:37:13,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:13,661 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:13,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:13,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:37:13,868 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:13,869 INFO L85 PathProgramCache]: Analyzing trace with hash -231193078, now seen corresponding path program 3 times [2022-11-02 20:37:13,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:13,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158034037] [2022-11-02 20:37:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:13,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:13,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:13,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694357384] [2022-11-02 20:37:13,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:37:13,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:13,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:13,899 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:13,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:37:14,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:37:14,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:14,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:37:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:37:14,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:37:14,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:14,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158034037] [2022-11-02 20:37:14,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:14,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694357384] [2022-11-02 20:37:14,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694357384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:14,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:14,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:37:14,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54349812] [2022-11-02 20:37:14,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:14,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:37:14,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:14,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:37:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:37:14,327 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:14,547 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-11-02 20:37:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:37:14,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-02 20:37:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:14,548 INFO L225 Difference]: With dead ends: 74 [2022-11-02 20:37:14,548 INFO L226 Difference]: Without dead ends: 50 [2022-11-02 20:37:14,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:37:14,549 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:14,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:37:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-02 20:37:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2022-11-02 20:37:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 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 20:37:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-02 20:37:14,556 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 28 [2022-11-02 20:37:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:14,556 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-02 20:37:14,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-02 20:37:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:37:14,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:14,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:14,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:14,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:14,773 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:14,774 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 4 times [2022-11-02 20:37:14,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:14,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764079065] [2022-11-02 20:37:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:14,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:14,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:14,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381970011] [2022-11-02 20:37:14,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:37:14,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:14,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:14,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:14,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:37:15,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:37:15,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:15,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 20:37:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:15,296 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:15,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-02 20:37:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-02 20:37:15,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:15,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:37:15,369 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:15,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-02 20:37:15,424 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:15,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-02 20:37:15,510 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:37:15,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2022-11-02 20:37:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2022-11-02 20:37:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 24 [2022-11-02 20:37:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,606 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:15,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-02 20:37:15,672 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:37:15,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2022-11-02 20:37:15,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2022-11-02 20:37:15,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-02 20:37:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,836 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:37:15,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2022-11-02 20:37:16,020 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:37:16,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 32 [2022-11-02 20:37:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:16,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:19,527 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_745 Int) (v_ArrVal_741 (Array Int Int)) (v_ArrVal_743 Int)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_741))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store (store .cse0 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_743) (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_745)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) 1)) is different from false [2022-11-02 20:37:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-02 20:37:19,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:19,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764079065] [2022-11-02 20:37:19,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:19,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381970011] [2022-11-02 20:37:19,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381970011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:19,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:19,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2022-11-02 20:37:19,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546634867] [2022-11-02 20:37:19,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:19,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:37:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:37:19,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=414, Unknown=1, NotChecked=42, Total=552 [2022-11-02 20:37:19,562 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:21,963 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-11-02 20:37:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:37:21,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-02 20:37:21,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:21,964 INFO L225 Difference]: With dead ends: 69 [2022-11-02 20:37:21,965 INFO L226 Difference]: Without dead ends: 67 [2022-11-02 20:37:21,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=178, Invalid=817, Unknown=1, NotChecked=60, Total=1056 [2022-11-02 20:37:21,966 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:21,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 71 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 59 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-11-02 20:37:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-02 20:37:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-11-02 20:37:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 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 20:37:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-11-02 20:37:21,979 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 30 [2022-11-02 20:37:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:21,979 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-11-02 20:37:21,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-11-02 20:37:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:37:21,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:21,981 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:21,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:22,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:37:22,187 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:22,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1792212012, now seen corresponding path program 4 times [2022-11-02 20:37:22,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:22,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804398446] [2022-11-02 20:37:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:22,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:22,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:22,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645515447] [2022-11-02 20:37:22,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:37:22,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:22,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:22,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:37:22,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:37:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:37:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:37:22,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:37:22,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:22,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804398446] [2022-11-02 20:37:22,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:37:22,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645515447] [2022-11-02 20:37:22,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645515447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:22,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:22,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-02 20:37:22,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555232400] [2022-11-02 20:37:22,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:22,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:37:22,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:37:22,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:37:22,512 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:22,813 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-11-02 20:37:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:37:22,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-02 20:37:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:22,815 INFO L225 Difference]: With dead ends: 137 [2022-11-02 20:37:22,815 INFO L226 Difference]: Without dead ends: 100 [2022-11-02 20:37:22,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:37:22,817 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:22,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 61 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:37:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-02 20:37:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2022-11-02 20:37:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 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 20:37:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2022-11-02 20:37:22,831 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 30 [2022-11-02 20:37:22,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:22,832 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2022-11-02 20:37:22,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2022-11-02 20:37:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:37:22,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:22,833 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:22,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:23,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:37:23,053 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:23,054 INFO L85 PathProgramCache]: Analyzing trace with hash 505093188, now seen corresponding path program 5 times [2022-11-02 20:37:23,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:23,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013766556] [2022-11-02 20:37:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:23,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:23,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:37:23,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938349526] [2022-11-02 20:37:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:37:23,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:23,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:23,098 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:23,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95d09485-fa33-4c31-8396-70541dcbf59f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process