./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R --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 298a2fa3454ac9d826b4a2fcda5c49527e83e26e7b8633f156b47d33577c1902 --- 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-38b53e6 [2022-11-25 17:19:11,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:19:11,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:19:12,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:19:12,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:19:12,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:19:12,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:19:12,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:19:12,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:19:12,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:19:12,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:19:12,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:19:12,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:19:12,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:19:12,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:19:12,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:19:12,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:19:12,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:19:12,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:19:12,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:19:12,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:19:12,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:19:12,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:19:12,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:19:12,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:19:12,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:19:12,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:19:12,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:19:12,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:19:12,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:19:12,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:19:12,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:19:12,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:19:12,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:19:12,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:19:12,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:19:12,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:19:12,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:19:12,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:19:12,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:19:12,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:19:12,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:19:12,153 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:19:12,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:19:12,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:19:12,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:19:12,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:19:12,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:19:12,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:19:12,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:19:12,157 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:19:12,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:19:12,158 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:19:12,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:19:12,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:19:12,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:19:12,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:19:12,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:19:12,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:19:12,160 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:19:12,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:19:12,161 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:19:12,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:19:12,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:19:12,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:19:12,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:19:12,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:19:12,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:19:12,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:19:12,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:19:12,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:19:12,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:19:12,164 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:19:12,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:19:12,165 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:19:12,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:19:12,165 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 298a2fa3454ac9d826b4a2fcda5c49527e83e26e7b8633f156b47d33577c1902 [2022-11-25 17:19:12,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:19:12,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:19:12,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:19:12,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:19:12,536 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:19:12,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c [2022-11-25 17:19:15,896 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:19:16,119 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:19:16,120 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c [2022-11-25 17:19:16,127 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/data/76a800ebd/5ba25d4f93a4428b866b7f7201d811ab/FLAG6b18b89df [2022-11-25 17:19:16,144 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/data/76a800ebd/5ba25d4f93a4428b866b7f7201d811ab [2022-11-25 17:19:16,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:19:16,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:19:16,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:19:16,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:19:16,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:19:16,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544eee5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16, skipping insertion in model container [2022-11-25 17:19:16,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:19:16,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:19:16,368 WARN L237 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_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c[537,550] [2022-11-25 17:19:16,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:19:16,403 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:19:16,427 WARN L237 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_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound2.c[537,550] [2022-11-25 17:19:16,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:19:16,465 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:19:16,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16 WrapperNode [2022-11-25 17:19:16,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:19:16,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:19:16,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:19:16,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:19:16,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,515 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-11-25 17:19:16,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:19:16,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:19:16,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:19:16,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:19:16,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:19:16,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:19:16,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:19:16,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:19:16,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (1/1) ... [2022-11-25 17:19:16,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:19:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:16,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:19:16,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:19:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:19:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 17:19:16,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 17:19:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:19:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:19:16,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:19:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:19:16,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:19:16,750 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:19:16,752 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:19:16,933 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:19:16,940 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:19:16,941 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:19:16,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:19:16 BoogieIcfgContainer [2022-11-25 17:19:16,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:19:16,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:19:16,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:19:16,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:19:16,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:19:16" (1/3) ... [2022-11-25 17:19:16,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cb739d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:19:16, skipping insertion in model container [2022-11-25 17:19:16,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:16" (2/3) ... [2022-11-25 17:19:16,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cb739d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:19:16, skipping insertion in model container [2022-11-25 17:19:16,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:19:16" (3/3) ... [2022-11-25 17:19:16,956 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound2.c [2022-11-25 17:19:16,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:19:16,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:19:17,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:19:17,051 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;@5cd5e04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:19:17,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:19:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:19:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:19:17,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:17,067 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:17,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash 902207739, now seen corresponding path program 1 times [2022-11-25 17:19:17,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:17,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050200120] [2022-11-25 17:19:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:17,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:17,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:17,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050200120] [2022-11-25 17:19:17,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:19:17,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606897581] [2022-11-25 17:19:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:17,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:17,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:17,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:19:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:19:17,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-25 17:19:17,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:17,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606897581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:17,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:17,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:19:17,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643813952] [2022-11-25 17:19:17,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:17,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:19:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:17,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:19:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:19:17,701 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 17:19:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:17,761 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2022-11-25 17:19:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:19:17,764 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-11-25 17:19:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:17,773 INFO L225 Difference]: With dead ends: 55 [2022-11-25 17:19:17,787 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 17:19:17,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:19:17,795 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-11-25 17:19:17,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:19:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 17:19:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-25 17:19:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:19:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-25 17:19:17,871 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 39 [2022-11-25 17:19:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:17,872 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-25 17:19:17,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 17:19:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-25 17:19:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:19:17,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:17,881 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:17,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:18,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 17:19:18,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash -722599373, now seen corresponding path program 1 times [2022-11-25 17:19:18,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:18,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186041997] [2022-11-25 17:19:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:18,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:18,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:19:18,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723933798] [2022-11-25 17:19:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:18,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:18,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:18,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:18,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:19:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:19:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 17:19:18,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:18,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186041997] [2022-11-25 17:19:18,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:19:18,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723933798] [2022-11-25 17:19:18,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723933798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:18,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:18,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:19:18,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916954864] [2022-11-25 17:19:18,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:18,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:19:18,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:19:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:19:18,670 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 17:19:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:19,031 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-11-25 17:19:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:19:19,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-11-25 17:19:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:19,035 INFO L225 Difference]: With dead ends: 38 [2022-11-25 17:19:19,035 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 17:19:19,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:19:19,037 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:19,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:19:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 17:19:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-11-25 17:19:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:19:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-25 17:19:19,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 39 [2022-11-25 17:19:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:19,051 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-25 17:19:19,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 17:19:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-25 17:19:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 17:19:19,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:19,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:19,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:19,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:19,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1459116230, now seen corresponding path program 1 times [2022-11-25 17:19:19,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:19,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238710877] [2022-11-25 17:19:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:19,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:19,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:19:19,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057342001] [2022-11-25 17:19:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:19,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:19,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:19,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:19,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa71385-ca5c-4d48-bf20-c37d9fcf448e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process