./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN --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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- 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-6b4ec56 [2022-11-20 09:35:37,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:35:37,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:35:37,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:35:37,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:35:37,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:35:37,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:35:37,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:35:37,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:35:37,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:35:37,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:35:37,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:35:37,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:35:37,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:35:37,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:35:37,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:35:37,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:35:37,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:35:37,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:35:37,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:35:37,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:35:37,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:35:37,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:35:37,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:35:37,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:35:37,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:35:37,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:35:37,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:35:37,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:35:37,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:35:37,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:35:37,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:35:37,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:35:37,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:35:37,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:35:37,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:35:37,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:35:37,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:35:37,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:35:37,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:35:37,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:35:37,120 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:35:37,154 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:35:37,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:35:37,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:35:37,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:35:37,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:35:37,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:35:37,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:35:37,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:35:37,160 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:35:37,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:35:37,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:35:37,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:35:37,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:35:37,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:35:37,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:35:37,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:35:37,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:35:37,163 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:35:37,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:35:37,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:35:37,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:35:37,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:35:37,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:35:37,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:35:37,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:35:37,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:35:37,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:35:37,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:35:37,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:35:37,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:35:37,166 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:35:37,166 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:35:37,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:35:37,167 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_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2022-11-20 09:35:37,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:35:37,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:35:37,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:35:37,506 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:35:37,506 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:35:37,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-11-20 09:35:40,526 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:35:40,749 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:35:40,749 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-11-20 09:35:40,756 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/data/55b9bd026/52b8f260714a4937a289e2b3340bff66/FLAG79ed64376 [2022-11-20 09:35:40,771 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/data/55b9bd026/52b8f260714a4937a289e2b3340bff66 [2022-11-20 09:35:40,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:35:40,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:35:40,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:35:40,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:35:40,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:35:40,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:35:40" (1/1) ... [2022-11-20 09:35:40,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55dde92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:40, skipping insertion in model container [2022-11-20 09:35:40,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:35:40" (1/1) ... [2022-11-20 09:35:40,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:35:40,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:35:40,973 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_2561546d-a80d-487d-88a9-66611c60427d/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-11-20 09:35:40,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:35:41,004 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:35:41,016 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_2561546d-a80d-487d-88a9-66611c60427d/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-11-20 09:35:41,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:35:41,039 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:35:41,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41 WrapperNode [2022-11-20 09:35:41,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:35:41,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:35:41,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:35:41,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:35:41,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,074 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-20 09:35:41,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:35:41,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:35:41,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:35:41,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:35:41,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,093 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:35:41,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:35:41,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:35:41,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:35:41,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (1/1) ... [2022-11-20 09:35:41,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:35:41,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:41,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:35:41,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:35:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:35:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 09:35:41,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 09:35:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:35:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:35:41,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:35:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 09:35:41,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 09:35:41,258 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:35:41,260 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:35:41,422 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:35:41,428 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:35:41,428 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:35:41,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:35:41 BoogieIcfgContainer [2022-11-20 09:35:41,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:35:41,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:35:41,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:35:41,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:35:41,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:35:40" (1/3) ... [2022-11-20 09:35:41,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662c53d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:35:41, skipping insertion in model container [2022-11-20 09:35:41,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:41" (2/3) ... [2022-11-20 09:35:41,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662c53d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:35:41, skipping insertion in model container [2022-11-20 09:35:41,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:35:41" (3/3) ... [2022-11-20 09:35:41,440 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2022-11-20 09:35:41,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:35:41,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:35:41,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:35:41,516 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;@47630b72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:35:41,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:35:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 09:35:41,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:35:41,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:41,527 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] [2022-11-20 09:35:41,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-11-20 09:35:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:41,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608406268] [2022-11-20 09:35:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:41,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:41,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608406268] [2022-11-20 09:35:41,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 09:35:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254154858] [2022-11-20 09:35:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:41,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:41,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:41,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:35:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:41,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 09:35:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-20 09:35:41,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:35:41,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254154858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:35:41,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:35:41,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:35:41,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939773198] [2022-11-20 09:35:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:35:41,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:35:41,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:35:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:35:41,892 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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) [2022-11-20 09:35:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:41,956 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-11-20 09:35:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:35:41,958 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 [2022-11-20 09:35:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:41,966 INFO L225 Difference]: With dead ends: 67 [2022-11-20 09:35:41,966 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 09:35:41,969 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 [2022-11-20 09:35:41,972 INFO L413 NwaCegarLoop]: 46 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, 46 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 [2022-11-20 09:35:41,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:35:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 09:35:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-20 09:35:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 09:35:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-11-20 09:35:42,025 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-11-20 09:35:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:42,026 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-11-20 09:35:42,026 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) [2022-11-20 09:35:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-11-20 09:35:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 09:35:42,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:42,028 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, 1] [2022-11-20 09:35:42,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:42,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 09:35:42,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-11-20 09:35:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:42,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858351524] [2022-11-20 09:35:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:42,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:42,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700050063] [2022-11-20 09:35:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:42,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:42,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:42,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:35:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:35:42,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 09:35:42,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 09:35:42,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:42,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858351524] [2022-11-20 09:35:42,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:42,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700050063] [2022-11-20 09:35:42,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700050063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:42,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:42,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-20 09:35:42,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122281324] [2022-11-20 09:35:42,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:42,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:35:42,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:35:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:35:42,603 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 09:35:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:42,756 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-11-20 09:35:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:35:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-11-20 09:35:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:42,758 INFO L225 Difference]: With dead ends: 48 [2022-11-20 09:35:42,759 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 09:35:42,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:35:42,761 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:42,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:35:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 09:35:42,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-20 09:35:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 09:35:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-11-20 09:35:42,774 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-11-20 09:35:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:42,775 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-11-20 09:35:42,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 09:35:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-11-20 09:35:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 09:35:42,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:42,777 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, 1, 1] [2022-11-20 09:35:42,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 09:35:42,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:42,983 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-11-20 09:35:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:42,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164754451] [2022-11-20 09:35:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:43,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:43,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736041808] [2022-11-20 09:35:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:43,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:43,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:43,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:43,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:35:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:35:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 09:35:43,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 09:35:43,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:43,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164754451] [2022-11-20 09:35:43,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:43,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736041808] [2022-11-20 09:35:43,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736041808] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:43,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:35:43,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-20 09:35:43,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307119506] [2022-11-20 09:35:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:35:43,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:35:43,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:35:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:35:43,374 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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), 1 states have call successors, (6) [2022-11-20 09:35:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:43,460 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-20 09:35:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:35:43,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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), 1 states have call successors, (6) Word has length 41 [2022-11-20 09:35:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:43,465 INFO L225 Difference]: With dead ends: 39 [2022-11-20 09:35:43,465 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 09:35:43,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:35:43,470 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:43,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:35:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 09:35:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-20 09:35:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 09:35:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-20 09:35:43,488 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-11-20 09:35:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:43,488 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-20 09:35:43,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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), 1 states have call successors, (6) [2022-11-20 09:35:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-20 09:35:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 09:35:43,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:43,490 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:43,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:43,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:43,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-11-20 09:35:43,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:43,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766730770] [2022-11-20 09:35:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:43,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:43,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:43,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542654561] [2022-11-20 09:35:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:43,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:43,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:43,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:43,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:35:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:43,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:35:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 09:35:44,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 09:35:44,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:44,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766730770] [2022-11-20 09:35:44,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:44,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542654561] [2022-11-20 09:35:44,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542654561] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:44,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:35:44,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-20 09:35:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320220716] [2022-11-20 09:35:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:35:44,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:35:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:44,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:35:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:35:44,391 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 09:35:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:44,483 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-11-20 09:35:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:35:44,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-20 09:35:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:44,492 INFO L225 Difference]: With dead ends: 50 [2022-11-20 09:35:44,493 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 09:35:44,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:35:44,500 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:44,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:35:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 09:35:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-20 09:35:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 09:35:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-11-20 09:35:44,538 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-11-20 09:35:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:44,539 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-11-20 09:35:44,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 09:35:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-11-20 09:35:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 09:35:44,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:44,541 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:44,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:44,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:44,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-11-20 09:35:44,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:44,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001943675] [2022-11-20 09:35:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:44,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:44,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:44,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802433658] [2022-11-20 09:35:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:44,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:44,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:44,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:44,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:35:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:35:44,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 09:35:45,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 09:35:45,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001943675] [2022-11-20 09:35:45,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802433658] [2022-11-20 09:35:45,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802433658] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:45,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:35:45,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-20 09:35:45,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502089221] [2022-11-20 09:35:45,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:35:45,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:35:45,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:35:45,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:35:45,266 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 09:35:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:45,349 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-11-20 09:35:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:35:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-11-20 09:35:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:45,351 INFO L225 Difference]: With dead ends: 54 [2022-11-20 09:35:45,351 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 09:35:45,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:35:45,353 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:45,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:35:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 09:35:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-20 09:35:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 09:35:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-20 09:35:45,368 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-11-20 09:35:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:45,368 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-20 09:35:45,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 09:35:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-20 09:35:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 09:35:45,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:45,371 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:45,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:45,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:45,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:45,590 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-11-20 09:35:45,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:45,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145642964] [2022-11-20 09:35:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:45,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:45,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:45,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075370310] [2022-11-20 09:35:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:45,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:45,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:45,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:35:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 09:35:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 09:35:46,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:46,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:46,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145642964] [2022-11-20 09:35:46,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:46,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075370310] [2022-11-20 09:35:46,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075370310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:46,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:35:46,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-20 09:35:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841157510] [2022-11-20 09:35:46,158 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:46,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 09:35:46,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 09:35:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:35:46,160 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 09:35:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:46,434 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-11-20 09:35:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:35:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-11-20 09:35:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:46,436 INFO L225 Difference]: With dead ends: 60 [2022-11-20 09:35:46,437 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 09:35:46,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:35:46,438 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:46,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:35:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 09:35:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-11-20 09:35:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 09:35:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-11-20 09:35:46,456 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-11-20 09:35:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:46,457 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-11-20 09:35:46,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 09:35:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-11-20 09:35:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 09:35:46,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:46,459 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:46,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:46,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:46,664 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:46,665 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-11-20 09:35:46,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:46,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575260687] [2022-11-20 09:35:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:46,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:46,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:46,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282816290] [2022-11-20 09:35:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:46,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:46,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:46,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:35:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:35:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 09:35:46,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 09:35:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:46,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575260687] [2022-11-20 09:35:46,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:46,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282816290] [2022-11-20 09:35:46,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282816290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:46,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:46,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-20 09:35:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578702790] [2022-11-20 09:35:46,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:46,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:35:46,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:35:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:35:46,986 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 09:35:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:47,260 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-11-20 09:35:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:47,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-11-20 09:35:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:47,264 INFO L225 Difference]: With dead ends: 102 [2022-11-20 09:35:47,264 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 09:35:47,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:35:47,266 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:47,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:35:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 09:35:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-11-20 09:35:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-20 09:35:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-11-20 09:35:47,315 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-11-20 09:35:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:47,317 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-11-20 09:35:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 09:35:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-11-20 09:35:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 09:35:47,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:47,326 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:47,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:47,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 09:35:47,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:47,534 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-11-20 09:35:47,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:47,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415897466] [2022-11-20 09:35:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:47,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:47,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:47,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693081814] [2022-11-20 09:35:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:47,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:47,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:47,552 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:47,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:35:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 09:35:47,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 09:35:47,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-20 09:35:48,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415897466] [2022-11-20 09:35:48,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693081814] [2022-11-20 09:35:48,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693081814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:48,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:48,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2022-11-20 09:35:48,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48911418] [2022-11-20 09:35:48,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:48,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:35:48,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:35:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:35:48,051 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-20 09:35:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:48,682 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-11-20 09:35:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:35:48,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2022-11-20 09:35:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:48,690 INFO L225 Difference]: With dead ends: 128 [2022-11-20 09:35:48,690 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 09:35:48,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:35:48,692 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:48,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 203 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:35:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 09:35:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-11-20 09:35:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-20 09:35:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-11-20 09:35:48,751 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-11-20 09:35:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:48,751 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-11-20 09:35:48,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-20 09:35:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-11-20 09:35:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 09:35:48,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:48,753 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:48,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:48,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 09:35:48,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-11-20 09:35:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:48,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962117019] [2022-11-20 09:35:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:48,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:48,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:48,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757968742] [2022-11-20 09:35:48,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:35:48,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:48,975 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:48,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:35:49,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:49,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:49,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 09:35:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 09:35:49,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:57,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:57,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962117019] [2022-11-20 09:35:57,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:57,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757968742] [2022-11-20 09:35:57,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757968742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:57,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:35:57,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-20 09:35:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161252689] [2022-11-20 09:35:57,957 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=146, Unknown=4, NotChecked=0, Total=182 [2022-11-20 09:35:57,959 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 09:35:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:58,373 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2022-11-20 09:35:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:35:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2022-11-20 09:35:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:58,376 INFO L225 Difference]: With dead ends: 127 [2022-11-20 09:35:58,376 INFO L226 Difference]: Without dead ends: 125 [2022-11-20 09:35:58,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=59, Invalid=243, Unknown=4, NotChecked=0, Total=306 [2022-11-20 09:35:58,378 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:58,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 198 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 09:35:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-20 09:35:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-20 09:35:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-20 09:35:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2022-11-20 09:35:58,425 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 76 [2022-11-20 09:35:58,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:58,425 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2022-11-20 09:35:58,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 09:35:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2022-11-20 09:35:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 09:35:58,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:58,427 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:58,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:58,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:58,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-11-20 09:35:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469029361] [2022-11-20 09:35:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:58,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:35:58,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440485476] [2022-11-20 09:35:58,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:35:58,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:58,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:58,649 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:58,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:35:58,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:35:58,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 09:35:58,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-20 09:36:01,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:03,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:03,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469029361] [2022-11-20 09:36:03,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:36:03,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440485476] [2022-11-20 09:36:03,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440485476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:03,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:36:03,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-20 09:36:03,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748480960] [2022-11-20 09:36:03,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:03,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:36:03,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:03,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:36:03,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:36:03,132 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-20 09:36:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:04,888 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2022-11-20 09:36:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:36:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-11-20 09:36:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:04,891 INFO L225 Difference]: With dead ends: 132 [2022-11-20 09:36:04,892 INFO L226 Difference]: Without dead ends: 130 [2022-11-20 09:36:04,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:36:04,893 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:04,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 133 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:36:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-20 09:36:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-11-20 09:36:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 74 states have internal predecessors, (83), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-20 09:36:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2022-11-20 09:36:04,949 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 81 [2022-11-20 09:36:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:04,952 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2022-11-20 09:36:04,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-20 09:36:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2022-11-20 09:36:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 09:36:04,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:04,954 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:04,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:05,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 09:36:05,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:05,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-11-20 09:36:05,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:05,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110827711] [2022-11-20 09:36:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:05,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:05,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:36:05,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657467780] [2022-11-20 09:36:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:05,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:05,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:05,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:05,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 09:36:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:05,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 09:36:05,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-20 09:36:06,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-20 09:36:07,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110827711] [2022-11-20 09:36:07,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:36:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657467780] [2022-11-20 09:36:07,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657467780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:07,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:07,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-20 09:36:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059459930] [2022-11-20 09:36:07,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:07,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 09:36:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 09:36:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:36:07,138 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-20 09:36:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:23,144 INFO L93 Difference]: Finished difference Result 212 states and 298 transitions. [2022-11-20 09:36:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 09:36:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2022-11-20 09:36:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:23,146 INFO L225 Difference]: With dead ends: 212 [2022-11-20 09:36:23,146 INFO L226 Difference]: Without dead ends: 208 [2022-11-20 09:36:23,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 09:36:23,148 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 102 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:23,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 405 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-20 09:36:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-20 09:36:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2022-11-20 09:36:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 110 states have internal predecessors, (130), 79 states have call successors, (79), 15 states have call predecessors, (79), 15 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-20 09:36:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 287 transitions. [2022-11-20 09:36:23,230 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 287 transitions. Word has length 87 [2022-11-20 09:36:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:23,230 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 287 transitions. [2022-11-20 09:36:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-20 09:36:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 287 transitions. [2022-11-20 09:36:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 09:36:23,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:23,232 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:23,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:23,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:23,438 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2022-11-20 09:36:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:23,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913121897] [2022-11-20 09:36:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:23,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:36:23,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513112826] [2022-11-20 09:36:23,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:36:23,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:23,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:23,477 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:23,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 09:36:23,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:36:23,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:36:23,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-20 09:36:23,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:36:23,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:23,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913121897] [2022-11-20 09:36:23,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:36:23,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513112826] [2022-11-20 09:36:23,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513112826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:23,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:23,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:36:23,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702734011] [2022-11-20 09:36:23,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:23,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:36:23,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:23,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:36:23,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:36:23,615 INFO L87 Difference]: Start difference. First operand 204 states and 287 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 09:36:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:23,793 INFO L93 Difference]: Finished difference Result 257 states and 359 transitions. [2022-11-20 09:36:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:36:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2022-11-20 09:36:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:23,795 INFO L225 Difference]: With dead ends: 257 [2022-11-20 09:36:23,795 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 09:36:23,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:36:23,797 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:23,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:36:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 09:36:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2022-11-20 09:36:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 92 states have (on average 1.141304347826087) internal successors, (105), 93 states have internal predecessors, (105), 63 states have call successors, (63), 15 states have call predecessors, (63), 15 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-20 09:36:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 230 transitions. [2022-11-20 09:36:23,869 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 230 transitions. Word has length 101 [2022-11-20 09:36:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:23,870 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 230 transitions. [2022-11-20 09:36:23,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 09:36:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 230 transitions. [2022-11-20 09:36:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-20 09:36:23,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:23,872 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:23,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:24,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:24,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:24,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-11-20 09:36:24,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:24,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083309937] [2022-11-20 09:36:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:24,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:24,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:36:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284077782] [2022-11-20 09:36:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:24,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:24,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:24,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:24,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 09:36:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 09:36:24,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-20 09:36:25,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-20 09:36:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083309937] [2022-11-20 09:36:30,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:36:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284077782] [2022-11-20 09:36:30,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284077782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:30,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:30,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-11-20 09:36:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350735434] [2022-11-20 09:36:30,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:30,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:36:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:36:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:36:30,309 INFO L87 Difference]: Start difference. First operand 171 states and 230 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-20 09:36:32,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:36:40,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:36:48,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:36:50,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:36:53,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:00,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:06,492 INFO L93 Difference]: Finished difference Result 213 states and 290 transitions. [2022-11-20 09:37:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 09:37:06,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 103 [2022-11-20 09:37:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:06,495 INFO L225 Difference]: With dead ends: 213 [2022-11-20 09:37:06,495 INFO L226 Difference]: Without dead ends: 211 [2022-11-20 09:37:06,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 09:37:06,496 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 112 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 155 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:06,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 209 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1113 Invalid, 4 Unknown, 0 Unchecked, 21.1s Time] [2022-11-20 09:37:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-20 09:37:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2022-11-20 09:37:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 111 states have internal predecessors, (124), 75 states have call successors, (75), 16 states have call predecessors, (75), 16 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-20 09:37:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2022-11-20 09:37:06,593 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 103 [2022-11-20 09:37:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:06,594 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2022-11-20 09:37:06,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-20 09:37:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2022-11-20 09:37:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-20 09:37:06,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:06,596 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:06,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:06,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 09:37:06,802 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2022-11-20 09:37:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:06,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410873274] [2022-11-20 09:37:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:06,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:06,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:37:06,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152894948] [2022-11-20 09:37:06,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:37:06,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:06,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:06,814 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:06,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 09:37:06,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:37:06,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:06,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 09:37:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-11-20 09:37:07,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-20 09:37:09,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410873274] [2022-11-20 09:37:09,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:37:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152894948] [2022-11-20 09:37:09,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152894948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:09,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:09,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2022-11-20 09:37:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63621905] [2022-11-20 09:37:09,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:09,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:37:09,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:37:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:37:09,010 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-20 09:37:36,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:36,282 INFO L93 Difference]: Finished difference Result 282 states and 393 transitions. [2022-11-20 09:37:36,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 09:37:36,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 120 [2022-11-20 09:37:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:36,284 INFO L225 Difference]: With dead ends: 282 [2022-11-20 09:37:36,284 INFO L226 Difference]: Without dead ends: 280 [2022-11-20 09:37:36,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 09:37:36,286 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 118 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:36,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 244 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-11-20 09:37:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-20 09:37:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 248. [2022-11-20 09:37:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 139 states have internal predecessors, (155), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-20 09:37:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2022-11-20 09:37:36,457 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 120 [2022-11-20 09:37:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:36,457 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2022-11-20 09:37:36,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-20 09:37:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2022-11-20 09:37:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 09:37:36,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:36,460 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:36,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:36,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 09:37:36,666 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2022-11-20 09:37:36,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:36,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103287077] [2022-11-20 09:37:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:36,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:36,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:37:36,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273563949] [2022-11-20 09:37:36,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:37:36,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:36,682 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:36,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 09:37:36,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:37:36,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 09:37:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 81 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-11-20 09:37:37,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 67 proven. 29 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-11-20 09:37:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:38,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103287077] [2022-11-20 09:37:38,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:37:38,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273563949] [2022-11-20 09:37:38,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273563949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:38,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:38,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-11-20 09:37:38,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222965235] [2022-11-20 09:37:38,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:38,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:37:38,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:38,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:37:38,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:37:38,193 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-20 09:37:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:40,463 INFO L93 Difference]: Finished difference Result 287 states and 397 transitions. [2022-11-20 09:37:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:37:40,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) Word has length 123 [2022-11-20 09:37:40,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:40,467 INFO L225 Difference]: With dead ends: 287 [2022-11-20 09:37:40,467 INFO L226 Difference]: Without dead ends: 285 [2022-11-20 09:37:40,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 09:37:40,468 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 70 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:40,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 216 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 09:37:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-20 09:37:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 252. [2022-11-20 09:37:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 138 states have (on average 1.144927536231884) internal successors, (158), 142 states have internal predecessors, (158), 93 states have call successors, (93), 20 states have call predecessors, (93), 20 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-20 09:37:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 343 transitions. [2022-11-20 09:37:40,652 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 343 transitions. Word has length 123 [2022-11-20 09:37:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:40,653 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 343 transitions. [2022-11-20 09:37:40,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-20 09:37:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 343 transitions. [2022-11-20 09:37:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 09:37:40,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:40,658 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:40,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:40,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 09:37:40,863 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2022-11-20 09:37:40,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:40,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923043803] [2022-11-20 09:37:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:40,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:40,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:37:40,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372815905] [2022-11-20 09:37:40,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:37:40,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:40,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:40,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 09:37:40,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:37:40,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:40,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-20 09:37:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 113 proven. 94 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-20 09:37:42,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:45,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:45,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923043803] [2022-11-20 09:37:45,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:37:45,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372815905] [2022-11-20 09:37:45,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372815905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:45,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:37:45,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-20 09:37:45,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696454415] [2022-11-20 09:37:45,109 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:37:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:45,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:37:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:37:45,110 INFO L87 Difference]: Start difference. First operand 252 states and 343 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-20 09:37:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:47,217 INFO L93 Difference]: Finished difference Result 308 states and 414 transitions. [2022-11-20 09:37:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 09:37:47,218 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 134 [2022-11-20 09:37:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:47,220 INFO L225 Difference]: With dead ends: 308 [2022-11-20 09:37:47,220 INFO L226 Difference]: Without dead ends: 301 [2022-11-20 09:37:47,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 09:37:47,221 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:47,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 266 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 09:37:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-20 09:37:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 295. [2022-11-20 09:37:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 165 states have internal predecessors, (184), 109 states have call successors, (109), 24 states have call predecessors, (109), 24 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-20 09:37:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 401 transitions. [2022-11-20 09:37:47,415 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 401 transitions. Word has length 134 [2022-11-20 09:37:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:47,415 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 401 transitions. [2022-11-20 09:37:47,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-20 09:37:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 401 transitions. [2022-11-20 09:37:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-20 09:37:47,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:47,418 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:47,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:47,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:47,622 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:47,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2022-11-20 09:37:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:47,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298102312] [2022-11-20 09:37:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:47,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:37:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547941561] [2022-11-20 09:37:47,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:37:47,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:47,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:47,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:47,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 09:37:47,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:37:47,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-20 09:37:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 97 proven. 82 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2022-11-20 09:37:50,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:51,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298102312] [2022-11-20 09:37:51,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:37:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547941561] [2022-11-20 09:37:51,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547941561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:51,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:37:51,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-20 09:37:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018386735] [2022-11-20 09:37:51,636 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:51,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:37:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:37:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:37:51,637 INFO L87 Difference]: Start difference. First operand 295 states and 401 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-20 09:37:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:55,649 INFO L93 Difference]: Finished difference Result 313 states and 417 transitions. [2022-11-20 09:37:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:37:55,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 150 [2022-11-20 09:37:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:55,651 INFO L225 Difference]: With dead ends: 313 [2022-11-20 09:37:55,651 INFO L226 Difference]: Without dead ends: 311 [2022-11-20 09:37:55,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 09:37:55,652 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 80 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:55,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 216 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 09:37:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-20 09:37:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 303. [2022-11-20 09:37:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 171 states have internal predecessors, (190), 109 states have call successors, (109), 26 states have call predecessors, (109), 26 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-20 09:37:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 407 transitions. [2022-11-20 09:37:55,867 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 407 transitions. Word has length 150 [2022-11-20 09:37:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:55,867 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 407 transitions. [2022-11-20 09:37:55,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-20 09:37:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 407 transitions. [2022-11-20 09:37:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-20 09:37:55,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:55,870 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:55,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:56,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:56,077 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2022-11-20 09:37:56,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:56,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956917955] [2022-11-20 09:37:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:56,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:56,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:37:56,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009107434] [2022-11-20 09:37:56,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:37:56,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:56,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:56,091 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:56,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 09:37:56,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:37:56,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 09:37:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 28 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2022-11-20 09:37:56,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:59,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:59,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956917955] [2022-11-20 09:37:59,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:37:59,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009107434] [2022-11-20 09:37:59,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009107434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:59,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:37:59,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-20 09:37:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057661445] [2022-11-20 09:37:59,299 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:59,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2022-11-20 09:37:59,301 INFO L87 Difference]: Start difference. First operand 303 states and 407 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-20 09:38:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:00,049 INFO L93 Difference]: Finished difference Result 348 states and 469 transitions. [2022-11-20 09:38:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:38:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 153 [2022-11-20 09:38:00,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:00,051 INFO L225 Difference]: With dead ends: 348 [2022-11-20 09:38:00,051 INFO L226 Difference]: Without dead ends: 341 [2022-11-20 09:38:00,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=75, Invalid=344, Unknown=1, NotChecked=0, Total=420 [2022-11-20 09:38:00,053 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:00,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 174 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:38:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-20 09:38:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 323. [2022-11-20 09:38:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 177 states have (on average 1.1355932203389831) internal successors, (201), 181 states have internal predecessors, (201), 117 states have call successors, (117), 28 states have call predecessors, (117), 28 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-20 09:38:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 434 transitions. [2022-11-20 09:38:00,296 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 434 transitions. Word has length 153 [2022-11-20 09:38:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:00,296 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 434 transitions. [2022-11-20 09:38:00,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-20 09:38:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 434 transitions. [2022-11-20 09:38:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-20 09:38:00,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:00,299 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:00,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-20 09:38:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 09:38:00,504 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:38:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2018058068, now seen corresponding path program 4 times [2022-11-20 09:38:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527110975] [2022-11-20 09:38:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:00,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:38:00,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266734669] [2022-11-20 09:38:00,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:38:00,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:00,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:38:00,522 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:38:00,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 09:38:00,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:38:00,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:00,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 09:38:00,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 46 proven. 85 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-11-20 09:38:02,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-11-20 09:38:04,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:04,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527110975] [2022-11-20 09:38:04,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:38:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266734669] [2022-11-20 09:38:04,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266734669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:04,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:04,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-11-20 09:38:04,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251099504] [2022-11-20 09:38:04,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:04,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 09:38:04,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 09:38:04,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:38:04,466 INFO L87 Difference]: Start difference. First operand 323 states and 434 transitions. Second operand has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2022-11-20 09:39:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:03,221 INFO L93 Difference]: Finished difference Result 505 states and 723 transitions. [2022-11-20 09:39:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-20 09:39:03,221 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 156 [2022-11-20 09:39:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:03,225 INFO L225 Difference]: With dead ends: 505 [2022-11-20 09:39:03,225 INFO L226 Difference]: Without dead ends: 497 [2022-11-20 09:39:03,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=1063, Invalid=4789, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 09:39:03,228 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 258 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 3148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:03,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 802 Invalid, 3148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 22.3s Time] [2022-11-20 09:39:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-20 09:39:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 455. [2022-11-20 09:39:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 235 states have (on average 1.1702127659574468) internal successors, (275), 241 states have internal predecessors, (275), 188 states have call successors, (188), 31 states have call predecessors, (188), 31 states have return successors, (187), 182 states have call predecessors, (187), 187 states have call successors, (187) [2022-11-20 09:39:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 650 transitions. [2022-11-20 09:39:03,739 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 650 transitions. Word has length 156 [2022-11-20 09:39:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:03,740 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 650 transitions. [2022-11-20 09:39:03,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2022-11-20 09:39:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 650 transitions. [2022-11-20 09:39:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-20 09:39:03,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:03,743 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:03,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:03,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:39:03,950 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:39:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1664660918, now seen corresponding path program 5 times [2022-11-20 09:39:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:39:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107948510] [2022-11-20 09:39:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:39:03,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:39:03,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:39:03,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128167045] [2022-11-20 09:39:03,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:39:03,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:39:03,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:39:03,962 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:39:03,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 09:39:04,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 09:39:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:04,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:39:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-11-20 09:39:05,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-11-20 09:39:09,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:39:09,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107948510] [2022-11-20 09:39:09,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:39:09,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128167045] [2022-11-20 09:39:09,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128167045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:09,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:09,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-20 09:39:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197398883] [2022-11-20 09:39:09,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:09,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 09:39:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:39:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 09:39:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:39:09,575 INFO L87 Difference]: Start difference. First operand 455 states and 650 transitions. Second operand has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-20 09:39:39,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:39:49,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:40:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:21,258 INFO L93 Difference]: Finished difference Result 665 states and 980 transitions. [2022-11-20 09:40:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 09:40:21,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) Word has length 156 [2022-11-20 09:40:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:21,263 INFO L225 Difference]: With dead ends: 665 [2022-11-20 09:40:21,264 INFO L226 Difference]: Without dead ends: 656 [2022-11-20 09:40:21,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=1025, Invalid=4981, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 09:40:21,266 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 170 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:21,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 625 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1982 Invalid, 0 Unknown, 0 Unchecked, 36.8s Time] [2022-11-20 09:40:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-11-20 09:40:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 603. [2022-11-20 09:40:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 302 states have (on average 1.1788079470198676) internal successors, (356), 306 states have internal predecessors, (356), 265 states have call successors, (265), 35 states have call predecessors, (265), 35 states have return successors, (264), 261 states have call predecessors, (264), 264 states have call successors, (264) [2022-11-20 09:40:22,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 885 transitions. [2022-11-20 09:40:22,015 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 885 transitions. Word has length 156 [2022-11-20 09:40:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:22,015 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 885 transitions. [2022-11-20 09:40:22,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-20 09:40:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 885 transitions. [2022-11-20 09:40:22,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 09:40:22,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:22,018 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:22,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-20 09:40:22,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:40:22,225 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:40:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:22,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1404546792, now seen corresponding path program 5 times [2022-11-20 09:40:22,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:40:22,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436200945] [2022-11-20 09:40:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:40:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:40:22,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:40:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303237768] [2022-11-20 09:40:22,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:40:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:40:22,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:40:22,242 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:40:22,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 09:40:22,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-20 09:40:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:22,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-20 09:40:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 114 proven. 105 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2022-11-20 09:40:25,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 111 proven. 92 refuted. 1 times theorem prover too weak. 1006 trivial. 0 not checked. [2022-11-20 09:40:35,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:40:35,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436200945] [2022-11-20 09:40:35,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:40:35,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303237768] [2022-11-20 09:40:35,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303237768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:35,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:35,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2022-11-20 09:40:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203477876] [2022-11-20 09:40:35,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:35,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 09:40:35,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:40:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 09:40:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=801, Unknown=1, NotChecked=0, Total=992 [2022-11-20 09:40:35,231 INFO L87 Difference]: Start difference. First operand 603 states and 885 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 17 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (57), 17 states have call predecessors, (57), 16 states have call successors, (57) [2022-11-20 09:40:36,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:41:01,752 WARN L233 SmtUtils]: Spent 19.79s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:41:17,551 WARN L233 SmtUtils]: Spent 15.48s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:41:50,366 WARN L233 SmtUtils]: Spent 31.92s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:41:52,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:41:54,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:41:57,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:42:18,108 WARN L233 SmtUtils]: Spent 18.68s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:42:20,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:42:21,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:09,310 WARN L233 SmtUtils]: Spent 46.32s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:43:12,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:14,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:16,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:23,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:27,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:29,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:31,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:33,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:43,497 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:43:45,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:48,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:50,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:43:58,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:01,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:12,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:14,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:16,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:18,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:20,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:28,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:30,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:32,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:34,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:36,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:38,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:47,824 WARN L233 SmtUtils]: Spent 6.53s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:44:50,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:52,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:54,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:56,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:44:59,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:01,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:04,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:07,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:09,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:11,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:13,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:15,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:18,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:20,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:23,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:25,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:29,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:31,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:45:55,749 WARN L233 SmtUtils]: Spent 17.85s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:46:07,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:46:10,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:46:12,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:46:14,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:46:16,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:46:25,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:46:27,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:46:29,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:46:37,658 WARN L233 SmtUtils]: Spent 7.92s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:46:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:46:38,579 INFO L93 Difference]: Finished difference Result 672 states and 986 transitions. [2022-11-20 09:46:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 09:46:38,580 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 17 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (57), 17 states have call predecessors, (57), 16 states have call successors, (57) Word has length 172 [2022-11-20 09:46:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:46:38,583 INFO L225 Difference]: With dead ends: 672 [2022-11-20 09:46:38,584 INFO L226 Difference]: Without dead ends: 670 [2022-11-20 09:46:38,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 219.7s TimeCoverageRelationStatistics Valid=719, Invalid=2349, Unknown=12, NotChecked=0, Total=3080 [2022-11-20 09:46:38,586 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 197 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 361 mSolverCounterUnsat, 48 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 48 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:46:38,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 295 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1916 Invalid, 48 Unknown, 0 Unchecked, 149.2s Time] [2022-11-20 09:46:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-11-20 09:46:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 666. [2022-11-20 09:46:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 335 states have (on average 1.1791044776119404) internal successors, (395), 341 states have internal predecessors, (395), 293 states have call successors, (293), 37 states have call predecessors, (293), 37 states have return successors, (292), 287 states have call predecessors, (292), 292 states have call successors, (292) [2022-11-20 09:46:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 980 transitions. [2022-11-20 09:46:39,802 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 980 transitions. Word has length 172 [2022-11-20 09:46:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:46:39,803 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 980 transitions. [2022-11-20 09:46:39,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 17 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (57), 17 states have call predecessors, (57), 16 states have call successors, (57) [2022-11-20 09:46:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 980 transitions. [2022-11-20 09:46:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-20 09:46:39,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:46:39,807 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:46:39,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 09:46:40,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:46:40,015 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:46:40,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:46:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 6 times [2022-11-20 09:46:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:46:40,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185830101] [2022-11-20 09:46:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:46:40,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:46:40,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:46:40,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716069761] [2022-11-20 09:46:40,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:46:40,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:46:40,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:46:40,040 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:46:40,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 09:46:45,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 09:46:45,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:46:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 09:46:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:46:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 180 proven. 38 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2022-11-20 09:46:48,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:46:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:46:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185830101] [2022-11-20 09:46:48,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:46:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716069761] [2022-11-20 09:46:48,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716069761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:46:48,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:46:48,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-20 09:46:48,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245558414] [2022-11-20 09:46:48,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:46:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:46:48,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:46:48,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:46:48,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:46:48,741 INFO L87 Difference]: Start difference. First operand 666 states and 980 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-11-20 09:46:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:46:59,312 INFO L93 Difference]: Finished difference Result 751 states and 1103 transitions. [2022-11-20 09:46:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 09:46:59,313 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 175 [2022-11-20 09:46:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:46:59,318 INFO L225 Difference]: With dead ends: 751 [2022-11-20 09:46:59,318 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 09:46:59,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 09:46:59,320 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:46:59,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 201 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 09:46:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 09:47:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2022-11-20 09:47:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 371 states have (on average 1.1805929919137466) internal successors, (438), 377 states have internal predecessors, (438), 329 states have call successors, (329), 42 states have call predecessors, (329), 42 states have return successors, (328), 323 states have call predecessors, (328), 328 states have call successors, (328) [2022-11-20 09:47:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1095 transitions. [2022-11-20 09:47:00,665 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1095 transitions. Word has length 175 [2022-11-20 09:47:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:47:00,665 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1095 transitions. [2022-11-20 09:47:00,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-11-20 09:47:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1095 transitions. [2022-11-20 09:47:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-20 09:47:00,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:47:00,671 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:47:00,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:47:00,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 09:47:00,885 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:47:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:47:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1249596117, now seen corresponding path program 7 times [2022-11-20 09:47:00,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:47:00,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642322255] [2022-11-20 09:47:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:47:00,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:47:00,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:47:00,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089452805] [2022-11-20 09:47:00,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:47:00,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:47:00,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:47:00,904 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:47:00,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 09:47:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:47:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:47:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:47:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 366 proven. 112 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2022-11-20 09:47:01,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:47:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 93 proven. 103 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2022-11-20 09:47:02,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:47:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642322255] [2022-11-20 09:47:02,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:47:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089452805] [2022-11-20 09:47:02,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089452805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:47:02,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:47:02,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-11-20 09:47:02,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777112901] [2022-11-20 09:47:02,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:47:02,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 09:47:02,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:47:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 09:47:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:47:02,122 INFO L87 Difference]: Start difference. First operand 743 states and 1095 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) [2022-11-20 09:47:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:47:07,415 INFO L93 Difference]: Finished difference Result 1009 states and 1479 transitions. [2022-11-20 09:47:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 09:47:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) Word has length 194 [2022-11-20 09:47:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:47:07,422 INFO L225 Difference]: With dead ends: 1009 [2022-11-20 09:47:07,423 INFO L226 Difference]: Without dead ends: 828 [2022-11-20 09:47:07,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=606, Invalid=2474, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 09:47:07,426 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 99 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:47:07,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 610 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 09:47:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-20 09:47:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 778. [2022-11-20 09:47:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 390 states have (on average 1.1692307692307693) internal successors, (456), 397 states have internal predecessors, (456), 345 states have call successors, (345), 42 states have call predecessors, (345), 42 states have return successors, (344), 338 states have call predecessors, (344), 344 states have call successors, (344) [2022-11-20 09:47:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1145 transitions. [2022-11-20 09:47:09,084 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1145 transitions. Word has length 194 [2022-11-20 09:47:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:47:09,085 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 1145 transitions. [2022-11-20 09:47:09,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) [2022-11-20 09:47:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1145 transitions. [2022-11-20 09:47:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-20 09:47:09,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:47:09,091 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:47:09,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 09:47:09,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 09:47:09,299 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:47:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:47:09,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1062534286, now seen corresponding path program 8 times [2022-11-20 09:47:09,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:47:09,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595236954] [2022-11-20 09:47:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:47:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:47:09,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:47:09,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791230811] [2022-11-20 09:47:09,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:47:09,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:47:09,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:47:09,316 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:47:09,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2561546d-a80d-487d-88a9-66611c60427d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 09:47:09,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:47:09,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:47:09,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-20 09:47:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:47:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 264 proven. 156 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2022-11-20 09:47:20,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:47:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 258 proven. 141 refuted. 6 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-11-20 09:47:48,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:47:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595236954] [2022-11-20 09:47:48,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:47:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791230811] [2022-11-20 09:47:48,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791230811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:47:48,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:47:48,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2022-11-20 09:47:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400637162] [2022-11-20 09:47:48,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:47:48,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 09:47:48,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:47:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 09:47:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1245, Unknown=5, NotChecked=0, Total=1560 [2022-11-20 09:47:48,104 INFO L87 Difference]: Start difference. First operand 778 states and 1145 transitions. Second operand has 40 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 23 states have call successors, (65), 3 states have call predecessors, (65), 3 states have return successors, (64), 23 states have call predecessors, (64), 22 states have call successors, (64) [2022-11-20 09:47:51,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:47:56,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:48:31,383 WARN L233 SmtUtils]: Spent 32.70s on a formula simplification. DAG size of input: 142 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:49:15,234 WARN L233 SmtUtils]: Spent 43.31s on a formula simplification. DAG size of input: 143 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:49:17,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:49:19,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:50:15,131 WARN L233 SmtUtils]: Spent 52.69s on a formula simplification. DAG size of input: 128 DAG size of output: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:50:43,581 WARN L233 SmtUtils]: Spent 26.31s on a formula simplification. DAG size of input: 128 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)