./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX --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 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:32:46,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:32:46,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:32:47,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:32:47,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:32:47,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:32:47,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:32:47,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:32:47,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:32:47,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:32:47,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:32:47,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:32:47,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:32:47,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:32:47,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:32:47,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:32:47,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:32:47,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:32:47,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:32:47,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:32:47,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:32:47,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:32:47,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:32:47,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:32:47,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:32:47,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:32:47,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:32:47,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:32:47,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:32:47,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:32:47,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:32:47,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:32:47,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:32:47,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:32:47,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:32:47,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:32:47,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:32:47,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:32:47,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:32:47,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:32:47,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:32:47,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:32:47,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:32:47,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:32:47,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:32:47,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:32:47,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:32:47,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:32:47,194 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:32:47,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:32:47,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:32:47,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:32:47,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:32:47,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:32:47,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:32:47,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:32:47,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:32:47,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:32:47,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:32:47,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:32:47,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:32:47,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:32:47,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:32:47,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:32:47,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:47,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:32:47,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:32:47,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:32:47,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:32:47,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:32:47,200 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:32:47,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:32:47,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:32:47,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:32:47,202 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_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 [2021-11-09 09:32:47,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:32:47,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:32:47,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:32:47,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:32:47,512 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:32:47,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-11-09 09:32:47,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/data/c12009aee/46eb9eb0888341b6ba79d9d665cf7111/FLAG71afaa43d [2021-11-09 09:32:48,062 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:32:48,063 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-11-09 09:32:48,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/data/c12009aee/46eb9eb0888341b6ba79d9d665cf7111/FLAG71afaa43d [2021-11-09 09:32:48,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/data/c12009aee/46eb9eb0888341b6ba79d9d665cf7111 [2021-11-09 09:32:48,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:32:48,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:32:48,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:48,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:32:48,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:32:48,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d7a0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48, skipping insertion in model container [2021-11-09 09:32:48,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:32:48,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:32:48,647 WARN L228 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_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-11-09 09:32:48,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:48,682 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:32:48,702 WARN L228 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_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-11-09 09:32:48,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:48,740 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:32:48,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48 WrapperNode [2021-11-09 09:32:48,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:48,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:48,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:32:48,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:32:48,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:48,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:32:48,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:32:48,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:32:48,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:32:48,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:32:48,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:32:48,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:32:48,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (1/1) ... [2021-11-09 09:32:48,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:48,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:32:48,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:32:48,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:32:48,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:32:48,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:32:48,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:32:49,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:32:49,138 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 09:32:49,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:49 BoogieIcfgContainer [2021-11-09 09:32:49,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:32:49,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:32:49,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:32:49,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:32:49,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:32:48" (1/3) ... [2021-11-09 09:32:49,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64760e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:49, skipping insertion in model container [2021-11-09 09:32:49,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:48" (2/3) ... [2021-11-09 09:32:49,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64760e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:49, skipping insertion in model container [2021-11-09 09:32:49,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:49" (3/3) ... [2021-11-09 09:32:49,159 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2021-11-09 09:32:49,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:32:49,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-09 09:32:49,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:32:49,269 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:32:49,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 09:32:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 09:32:49,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:49,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 09:32:49,318 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-11-09 09:32:49,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:49,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057733196] [2021-11-09 09:32:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:49,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:49,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:49,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714233437] [2021-11-09 09:32:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:49,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:49,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:49,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:32:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:32:49,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:49,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:49,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057733196] [2021-11-09 09:32:49,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:49,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714233437] [2021-11-09 09:32:49,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714233437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:49,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:49,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:32:49,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774704611] [2021-11-09 09:32:49,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:49,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:49,751 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:49,823 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-09 09:32:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:32:49,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-09 09:32:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:49,832 INFO L225 Difference]: With dead ends: 54 [2021-11-09 09:32:49,833 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 09:32:49,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 09:32:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-11-09 09:32:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-09 09:32:49,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2021-11-09 09:32:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:49,868 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-09 09:32:49,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-09 09:32:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:32:49,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:49,870 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:49,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:50,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:50,082 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:50,083 INFO L85 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-11-09 09:32:50,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:50,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322709913] [2021-11-09 09:32:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:50,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:50,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:50,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895663556] [2021-11-09 09:32:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:50,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:50,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:50,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:50,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:32:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:32:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:50,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:50,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322709913] [2021-11-09 09:32:50,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:50,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895663556] [2021-11-09 09:32:50,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895663556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:50,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:50,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 09:32:50,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150547277] [2021-11-09 09:32:50,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:50,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:50,311 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:50,377 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-09 09:32:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:32:50,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 09:32:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:50,378 INFO L225 Difference]: With dead ends: 37 [2021-11-09 09:32:50,379 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 09:32:50,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 09:32:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-09 09:32:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-09 09:32:50,386 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2021-11-09 09:32:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:50,386 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-09 09:32:50,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-09 09:32:50,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:32:50,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:50,388 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:50,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:50,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-09 09:32:50,590 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2021-11-09 09:32:50,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:50,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163483641] [2021-11-09 09:32:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:50,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:50,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:50,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597537876] [2021-11-09 09:32:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:50,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:50,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:50,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:50,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:32:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:32:50,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:50,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:50,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163483641] [2021-11-09 09:32:50,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:50,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597537876] [2021-11-09 09:32:50,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597537876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:50,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:50,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-09 09:32:50,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134975273] [2021-11-09 09:32:50,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:50,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:50,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:50,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:50,801 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:50,841 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-09 09:32:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:32:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 09:32:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:50,846 INFO L225 Difference]: With dead ends: 30 [2021-11-09 09:32:50,846 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 09:32:50,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 09:32:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-09 09:32:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-09 09:32:50,864 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2021-11-09 09:32:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:50,865 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-09 09:32:50,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-09 09:32:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:32:50,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:50,868 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:50,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:51,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:51,086 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2021-11-09 09:32:51,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:51,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825392209] [2021-11-09 09:32:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:51,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:51,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:51,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995143283] [2021-11-09 09:32:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:51,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:51,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:51,102 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:51,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:32:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:32:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:51,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:51,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825392209] [2021-11-09 09:32:51,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:51,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995143283] [2021-11-09 09:32:51,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995143283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:51,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:51,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:32:51,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448939106] [2021-11-09 09:32:51,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:32:51,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:32:51,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:51,436 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:51,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:51,507 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-09 09:32:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:32:51,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 09:32:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:51,508 INFO L225 Difference]: With dead ends: 28 [2021-11-09 09:32:51,509 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 09:32:51,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 09:32:51,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-09 09:32:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-09 09:32:51,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2021-11-09 09:32:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:51,514 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-09 09:32:51,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-09 09:32:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:32:51,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:51,516 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-11-09 09:32:51,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 09:32:51,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:51,730 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:51,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2021-11-09 09:32:51,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:51,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057784532] [2021-11-09 09:32:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:51,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:51,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:51,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975642483] [2021-11-09 09:32:51,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:51,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:51,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:51,746 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:51,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:32:51,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:51,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:32:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:52,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:52,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057784532] [2021-11-09 09:32:52,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:52,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975642483] [2021-11-09 09:32:52,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975642483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:52,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:52,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:32:52,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316796497] [2021-11-09 09:32:52,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:32:52,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:52,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:32:52,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:52,107 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:52,199 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-09 09:32:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:32:52,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 09:32:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:52,203 INFO L225 Difference]: With dead ends: 41 [2021-11-09 09:32:52,204 INFO L226 Difference]: Without dead ends: 35 [2021-11-09 09:32:52,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-09 09:32:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-09 09:32:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-09 09:32:52,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 14 [2021-11-09 09:32:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:52,220 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-09 09:32:52,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-09 09:32:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:32:52,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:52,221 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:52,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:52,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:52,427 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:52,427 INFO L85 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 2 times [2021-11-09 09:32:52,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:52,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934293529] [2021-11-09 09:32:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:52,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:52,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:52,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111180010] [2021-11-09 09:32:52,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:52,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:52,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:52,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:32:52,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:32:52,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:52,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:52,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934293529] [2021-11-09 09:32:52,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:52,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111180010] [2021-11-09 09:32:52,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111180010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:52,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:52,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 09:32:52,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646962268] [2021-11-09 09:32:52,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:32:52,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:32:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:52,603 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:52,662 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-09 09:32:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:32:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 09:32:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:52,664 INFO L225 Difference]: With dead ends: 34 [2021-11-09 09:32:52,664 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 09:32:52,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 09:32:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-09 09:32:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-09 09:32:52,670 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2021-11-09 09:32:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:52,670 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-09 09:32:52,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-09 09:32:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 09:32:52,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:52,672 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:52,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:52,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:52,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:52,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 2 times [2021-11-09 09:32:52,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:52,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684913696] [2021-11-09 09:32:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:52,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:52,910 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:52,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569325805] [2021-11-09 09:32:52,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:52,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:52,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:52,912 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:52,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:32:53,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:53,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:32:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:53,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:53,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684913696] [2021-11-09 09:32:53,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:53,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569325805] [2021-11-09 09:32:53,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569325805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:53,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:53,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:32:53,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451349892] [2021-11-09 09:32:53,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:53,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:53,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:53,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:53,243 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:53,326 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-09 09:32:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:32:53,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 09:32:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:53,329 INFO L225 Difference]: With dead ends: 32 [2021-11-09 09:32:53,333 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 09:32:53,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 09:32:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-09 09:32:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-09 09:32:53,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2021-11-09 09:32:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:53,342 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-09 09:32:53,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-09 09:32:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:32:53,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:53,344 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-11-09 09:32:53,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:53,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:53,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2021-11-09 09:32:53,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:53,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60953247] [2021-11-09 09:32:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:53,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:53,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:53,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872687631] [2021-11-09 09:32:53,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:32:53,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:53,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:53,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:53,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:32:53,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:32:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:53,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:32:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:32:53,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:53,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60953247] [2021-11-09 09:32:53,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:53,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872687631] [2021-11-09 09:32:53,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872687631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:53,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:53,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 09:32:53,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693243729] [2021-11-09 09:32:53,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:53,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:53,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:53,807 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:53,983 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-09 09:32:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 09:32:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:53,984 INFO L225 Difference]: With dead ends: 28 [2021-11-09 09:32:53,984 INFO L226 Difference]: Without dead ends: 22 [2021-11-09 09:32:53,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-09 09:32:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-09 09:32:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-09 09:32:53,989 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-11-09 09:32:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:53,989 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-09 09:32:53,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-09 09:32:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:32:53,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:53,990 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:54,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:54,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 09:32:54,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 3 times [2021-11-09 09:32:54,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:54,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711758366] [2021-11-09 09:32:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:54,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:54,225 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:54,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073919218] [2021-11-09 09:32:54,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:32:54,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:54,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:54,227 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:54,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:32:54,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:32:54,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:54,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:32:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:54,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:54,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711758366] [2021-11-09 09:32:54,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:54,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073919218] [2021-11-09 09:32:54,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073919218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:54,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:54,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:32:54,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161800047] [2021-11-09 09:32:54,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:54,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:54,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:54,428 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:54,471 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-09 09:32:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:32:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 09:32:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:54,474 INFO L225 Difference]: With dead ends: 28 [2021-11-09 09:32:54,474 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 09:32:54,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 09:32:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-09 09:32:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-09 09:32:54,486 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2021-11-09 09:32:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:54,487 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-09 09:32:54,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-09 09:32:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:32:54,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:54,488 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:54,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-09 09:32:54,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:54,702 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1493484688, now seen corresponding path program 3 times [2021-11-09 09:32:54,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:54,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601188688] [2021-11-09 09:32:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:54,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:54,712 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:54,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451915327] [2021-11-09 09:32:54,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:32:54,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:54,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:54,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:54,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:32:54,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:32:54,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:32:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:55,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:55,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601188688] [2021-11-09 09:32:55,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:55,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451915327] [2021-11-09 09:32:55,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451915327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:55,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:55,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 09:32:55,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034547458] [2021-11-09 09:32:55,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:32:55,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:32:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:55,121 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:55,210 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-09 09:32:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:32:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 09:32:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:55,211 INFO L225 Difference]: With dead ends: 30 [2021-11-09 09:32:55,211 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 09:32:55,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 09:32:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-09 09:32:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-09 09:32:55,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-11-09 09:32:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:55,224 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-09 09:32:55,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-09 09:32:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:32:55,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:55,225 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:55,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:55,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:32:55,454 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:55,454 INFO L85 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 4 times [2021-11-09 09:32:55,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:55,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344415444] [2021-11-09 09:32:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:55,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:55,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:55,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961417539] [2021-11-09 09:32:55,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:32:55,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:55,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:55,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:55,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:32:55,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:32:55,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:32:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:55,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:55,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344415444] [2021-11-09 09:32:55,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:55,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961417539] [2021-11-09 09:32:55,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961417539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:55,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:55,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:32:55,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383519984] [2021-11-09 09:32:55,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:32:55,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:55,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:32:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:55,719 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:55,772 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-09 09:32:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:32:55,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:32:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:55,774 INFO L225 Difference]: With dead ends: 32 [2021-11-09 09:32:55,774 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 09:32:55,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:32:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 09:32:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-09 09:32:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-09 09:32:55,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2021-11-09 09:32:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:55,780 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-09 09:32:55,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-09 09:32:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:32:55,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:55,781 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:55,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:55,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:32:55,994 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:55,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1128495004, now seen corresponding path program 4 times [2021-11-09 09:32:55,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:55,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723572167] [2021-11-09 09:32:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:55,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:56,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:56,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499676770] [2021-11-09 09:32:56,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:32:56,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:56,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:56,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:32:56,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:32:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:32:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:56,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:56,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723572167] [2021-11-09 09:32:56,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:56,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499676770] [2021-11-09 09:32:56,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499676770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:56,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:56,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:32:56,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536713857] [2021-11-09 09:32:56,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:32:56,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:32:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:56,488 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:56,613 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-09 09:32:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:32:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 09:32:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:56,614 INFO L225 Difference]: With dead ends: 34 [2021-11-09 09:32:56,614 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 09:32:56,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:32:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 09:32:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-09 09:32:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-09 09:32:56,620 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-11-09 09:32:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:56,620 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-09 09:32:56,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-09 09:32:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:32:56,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:56,621 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:56,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:56,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:56,833 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:56,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2117565153, now seen corresponding path program 5 times [2021-11-09 09:32:56,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:56,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453176969] [2021-11-09 09:32:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:56,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:56,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:56,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462771037] [2021-11-09 09:32:56,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:32:56,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:56,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:56,860 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:56,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:32:57,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:32:57,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:57,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:32:57,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:57,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:57,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453176969] [2021-11-09 09:32:57,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:57,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462771037] [2021-11-09 09:32:57,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462771037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:57,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:57,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 09:32:57,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123309462] [2021-11-09 09:32:57,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:32:57,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:57,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:32:57,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:57,488 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:57,559 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-09 09:32:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:32:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 09:32:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:57,560 INFO L225 Difference]: With dead ends: 36 [2021-11-09 09:32:57,560 INFO L226 Difference]: Without dead ends: 32 [2021-11-09 09:32:57,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:32:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-09 09:32:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-09 09:32:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-09 09:32:57,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-11-09 09:32:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:57,570 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-09 09:32:57,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-09 09:32:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:32:57,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:57,574 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:57,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:57,780 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash 881214008, now seen corresponding path program 5 times [2021-11-09 09:32:57,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:57,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741622699] [2021-11-09 09:32:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:57,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:57,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:57,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144027485] [2021-11-09 09:32:57,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:32:57,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:57,793 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:57,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:32:58,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:32:58,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:58,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:32:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:58,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:58,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741622699] [2021-11-09 09:32:58,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:58,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144027485] [2021-11-09 09:32:58,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144027485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:58,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:58,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:32:58,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613400201] [2021-11-09 09:32:58,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:32:58,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:32:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:58,628 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:58,899 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-09 09:32:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:32:58,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:32:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:58,900 INFO L225 Difference]: With dead ends: 38 [2021-11-09 09:32:58,900 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 09:32:58,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:32:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 09:32:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-09 09:32:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-09 09:32:58,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-11-09 09:32:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:58,919 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-09 09:32:58,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-09 09:32:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:32:58,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:58,920 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:58,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:59,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:32:59,126 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash 772479475, now seen corresponding path program 6 times [2021-11-09 09:32:59,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:59,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953671046] [2021-11-09 09:32:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:59,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:59,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:59,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119573638] [2021-11-09 09:32:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:32:59,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:59,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:59,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:32:59,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:32:59,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:32:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:59,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:59,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953671046] [2021-11-09 09:32:59,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:59,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119573638] [2021-11-09 09:32:59,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119573638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:59,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:59,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:32:59,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983875729] [2021-11-09 09:32:59,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:32:59,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:32:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:59,498 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:59,573 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-09 09:32:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:32:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 09:32:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:59,575 INFO L225 Difference]: With dead ends: 40 [2021-11-09 09:32:59,575 INFO L226 Difference]: Without dead ends: 36 [2021-11-09 09:32:59,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:32:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-09 09:32:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-09 09:32:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-09 09:32:59,581 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2021-11-09 09:32:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:59,581 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-09 09:32:59,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-09 09:32:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:32:59,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:59,583 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:59,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:59,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:32:59,783 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash -629738996, now seen corresponding path program 6 times [2021-11-09 09:32:59,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:59,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052877372] [2021-11-09 09:32:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:59,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:59,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:59,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824415115] [2021-11-09 09:32:59,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:32:59,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:59,805 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:59,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:33:00,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:33:00,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:00,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:33:00,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:00,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:00,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052877372] [2021-11-09 09:33:00,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:00,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824415115] [2021-11-09 09:33:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824415115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:00,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:00,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 09:33:00,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180321590] [2021-11-09 09:33:00,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:33:00,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:33:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:33:00,752 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:01,131 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-11-09 09:33:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:33:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 09:33:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:01,133 INFO L225 Difference]: With dead ends: 42 [2021-11-09 09:33:01,133 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 09:33:01,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:33:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 09:33:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-09 09:33:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-11-09 09:33:01,138 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-11-09 09:33:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:01,139 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-11-09 09:33:01,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-11-09 09:33:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:33:01,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:01,140 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:01,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:01,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:33:01,346 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash 445588679, now seen corresponding path program 7 times [2021-11-09 09:33:01,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:01,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999144237] [2021-11-09 09:33:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:01,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:01,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:01,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053838534] [2021-11-09 09:33:01,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:33:01,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:01,365 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:01,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:33:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:33:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:01,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:01,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999144237] [2021-11-09 09:33:01,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:01,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053838534] [2021-11-09 09:33:01,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053838534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:01,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:01,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:33:01,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451788169] [2021-11-09 09:33:01,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:33:01,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:01,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:33:01,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:33:01,732 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:01,821 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-09 09:33:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:33:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:33:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:01,822 INFO L225 Difference]: With dead ends: 44 [2021-11-09 09:33:01,822 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 09:33:01,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:33:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 09:33:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-09 09:33:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-09 09:33:01,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-11-09 09:33:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:01,829 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-09 09:33:01,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-09 09:33:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:33:01,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:01,830 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:01,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:02,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:33:02,058 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:02,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1239181344, now seen corresponding path program 7 times [2021-11-09 09:33:02,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:02,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471419222] [2021-11-09 09:33:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:02,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:02,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:02,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855056332] [2021-11-09 09:33:02,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:33:02,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:02,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:02,067 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:02,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:33:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:02,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:33:02,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:03,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:03,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471419222] [2021-11-09 09:33:03,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:03,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855056332] [2021-11-09 09:33:03,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855056332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:03,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:03,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 09:33:03,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427736434] [2021-11-09 09:33:03,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:33:03,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:33:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:33:03,028 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:03,334 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-09 09:33:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:33:03,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 09:33:03,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:03,335 INFO L225 Difference]: With dead ends: 46 [2021-11-09 09:33:03,336 INFO L226 Difference]: Without dead ends: 42 [2021-11-09 09:33:03,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:33:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-09 09:33:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-09 09:33:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-09 09:33:03,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2021-11-09 09:33:03,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:03,343 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-09 09:33:03,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-09 09:33:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:33:03,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:03,343 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:03,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:03,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:33:03,544 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1112955493, now seen corresponding path program 8 times [2021-11-09 09:33:03,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:03,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110680420] [2021-11-09 09:33:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:03,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:03,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:03,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477216554] [2021-11-09 09:33:03,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:03,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:03,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:03,555 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:03,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:33:03,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:03,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:33:03,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:03,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:03,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110680420] [2021-11-09 09:33:03,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:03,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477216554] [2021-11-09 09:33:03,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477216554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:03,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:03,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 09:33:03,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368106755] [2021-11-09 09:33:03,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:33:03,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:33:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:33:03,999 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:04,104 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-11-09 09:33:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:33:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 09:33:04,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:04,106 INFO L225 Difference]: With dead ends: 48 [2021-11-09 09:33:04,106 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 09:33:04,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:33:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 09:33:04,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-09 09:33:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-09 09:33:04,112 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2021-11-09 09:33:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:04,112 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-09 09:33:04,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:04,113 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-09 09:33:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:33:04,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:04,116 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:04,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:04,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:04,330 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash -56544332, now seen corresponding path program 8 times [2021-11-09 09:33:04,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:04,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71343395] [2021-11-09 09:33:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:04,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:04,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:04,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331651817] [2021-11-09 09:33:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:04,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:04,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:04,341 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:04,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:33:05,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:33:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:05,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:05,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71343395] [2021-11-09 09:33:05,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:05,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331651817] [2021-11-09 09:33:05,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331651817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:05,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:05,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 09:33:05,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462579020] [2021-11-09 09:33:05,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:33:05,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:33:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:33:05,657 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:05,892 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-11-09 09:33:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:33:05,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 09:33:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:05,893 INFO L225 Difference]: With dead ends: 50 [2021-11-09 09:33:05,893 INFO L226 Difference]: Without dead ends: 46 [2021-11-09 09:33:05,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:33:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-09 09:33:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-09 09:33:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-09 09:33:05,912 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2021-11-09 09:33:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:05,912 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-09 09:33:05,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-09 09:33:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:33:05,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:05,913 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:05,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:06,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:06,118 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:06,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1529846895, now seen corresponding path program 9 times [2021-11-09 09:33:06,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:06,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924841429] [2021-11-09 09:33:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:06,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:06,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:06,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250953620] [2021-11-09 09:33:06,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:33:06,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:06,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:06,128 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:06,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:33:06,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:33:06,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:06,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:33:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:06,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:06,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924841429] [2021-11-09 09:33:06,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:06,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250953620] [2021-11-09 09:33:06,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250953620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:06,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:06,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 09:33:06,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365735181] [2021-11-09 09:33:06,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:33:06,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:33:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:33:06,740 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:06,870 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-09 09:33:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:33:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:33:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:06,871 INFO L225 Difference]: With dead ends: 52 [2021-11-09 09:33:06,872 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 09:33:06,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:33:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 09:33:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-09 09:33:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-09 09:33:06,878 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2021-11-09 09:33:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:06,879 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-09 09:33:06,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-09 09:33:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:33:06,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:06,880 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:06,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:07,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:07,086 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1350878600, now seen corresponding path program 9 times [2021-11-09 09:33:07,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:07,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863172136] [2021-11-09 09:33:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:07,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:07,093 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:07,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209853771] [2021-11-09 09:33:07,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:33:07,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:07,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:07,097 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:07,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:33:07,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:33:07,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:33:07,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:08,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:08,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863172136] [2021-11-09 09:33:08,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:08,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209853771] [2021-11-09 09:33:08,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209853771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:08,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:08,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:33:08,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112303766] [2021-11-09 09:33:08,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:33:08,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:33:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:33:08,434 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:08,764 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-11-09 09:33:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:33:08,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:33:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:08,768 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:33:08,768 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 09:33:08,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:33:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 09:33:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-11-09 09:33:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-11-09 09:33:08,775 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2021-11-09 09:33:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:08,775 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-11-09 09:33:08,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-11-09 09:33:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:33:08,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:08,783 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:08,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:08,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:08,990 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1148586307, now seen corresponding path program 10 times [2021-11-09 09:33:08,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:08,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630231997] [2021-11-09 09:33:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:08,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:08,999 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:08,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082203335] [2021-11-09 09:33:08,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:33:08,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:09,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:09,000 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:09,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:33:09,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:33:09,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:33:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:09,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:09,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630231997] [2021-11-09 09:33:09,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:09,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082203335] [2021-11-09 09:33:09,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082203335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:09,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:09,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 09:33:09,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883271716] [2021-11-09 09:33:09,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:33:09,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:33:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:33:09,599 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:09,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:09,725 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-09 09:33:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:33:09,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:33:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:09,727 INFO L225 Difference]: With dead ends: 56 [2021-11-09 09:33:09,727 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 09:33:09,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:33:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 09:33:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-09 09:33:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-09 09:33:09,734 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2021-11-09 09:33:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:09,734 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-09 09:33:09,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-09 09:33:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:33:09,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:09,735 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:09,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:09,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:33:09,962 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash 31673692, now seen corresponding path program 10 times [2021-11-09 09:33:09,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:09,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521212279] [2021-11-09 09:33:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:09,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:09,973 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:09,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496270146] [2021-11-09 09:33:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:33:09,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:09,975 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:09,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:33:11,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:33:11,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:33:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:12,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:12,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521212279] [2021-11-09 09:33:12,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:12,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496270146] [2021-11-09 09:33:12,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496270146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:12,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:12,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:33:12,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275612988] [2021-11-09 09:33:12,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:33:12,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:12,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:33:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:33:12,179 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:12,454 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-09 09:33:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:33:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 09:33:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:12,455 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:33:12,456 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 09:33:12,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:33:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 09:33:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-09 09:33:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-09 09:33:12,463 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2021-11-09 09:33:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:12,463 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-09 09:33:12,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-09 09:33:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:33:12,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:12,464 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:12,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-09 09:33:12,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:33:12,665 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash 408022039, now seen corresponding path program 11 times [2021-11-09 09:33:12,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:12,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107455217] [2021-11-09 09:33:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:12,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:12,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:12,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959263544] [2021-11-09 09:33:12,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:33:12,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:12,678 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:12,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:33:13,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 09:33:13,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:13,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:33:13,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:13,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:13,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107455217] [2021-11-09 09:33:13,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:13,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959263544] [2021-11-09 09:33:13,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959263544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:13,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:13,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 09:33:13,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744781882] [2021-11-09 09:33:13,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:33:13,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:33:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:33:13,505 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:13,650 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-11-09 09:33:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:33:13,651 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 09:33:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:13,651 INFO L225 Difference]: With dead ends: 60 [2021-11-09 09:33:13,651 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 09:33:13,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:33:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 09:33:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-09 09:33:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-09 09:33:13,658 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2021-11-09 09:33:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:13,658 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-09 09:33:13,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-09 09:33:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:33:13,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:13,660 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:13,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:13,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:33:13,871 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:13,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1313983280, now seen corresponding path program 11 times [2021-11-09 09:33:13,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:13,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390013603] [2021-11-09 09:33:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:13,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:13,880 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:13,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49439413] [2021-11-09 09:33:13,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:33:13,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:13,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:13,881 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:13,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:33:14,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 09:33:14,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:14,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 09:33:14,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:15,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:15,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390013603] [2021-11-09 09:33:15,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:15,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49439413] [2021-11-09 09:33:15,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49439413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:15,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:15,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-09 09:33:15,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787860031] [2021-11-09 09:33:15,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:33:15,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:33:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:33:15,150 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:15,437 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-11-09 09:33:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:33:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:33:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:15,438 INFO L225 Difference]: With dead ends: 62 [2021-11-09 09:33:15,438 INFO L226 Difference]: Without dead ends: 58 [2021-11-09 09:33:15,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:33:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-09 09:33:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-09 09:33:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-09 09:33:15,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-11-09 09:33:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:15,445 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-09 09:33:15,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-09 09:33:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:33:15,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:15,446 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:15,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:15,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:33:15,646 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 51922155, now seen corresponding path program 12 times [2021-11-09 09:33:15,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:15,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602967477] [2021-11-09 09:33:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:15,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:15,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:15,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133575419] [2021-11-09 09:33:15,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:33:15,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:15,659 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:15,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:33:16,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 09:33:16,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:33:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:16,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:16,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602967477] [2021-11-09 09:33:16,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:16,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133575419] [2021-11-09 09:33:16,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133575419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:16,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:16,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:33:16,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947964007] [2021-11-09 09:33:16,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:33:16,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:33:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:33:16,551 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:16,710 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-09 09:33:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:33:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-09 09:33:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:16,711 INFO L225 Difference]: With dead ends: 64 [2021-11-09 09:33:16,711 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 09:33:16,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:33:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 09:33:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-09 09:33:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-09 09:33:16,728 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2021-11-09 09:33:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:16,729 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-09 09:33:16,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-09 09:33:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:33:16,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:16,731 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:16,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:16,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:33:16,938 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1595588860, now seen corresponding path program 12 times [2021-11-09 09:33:16,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:16,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337570437] [2021-11-09 09:33:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:16,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:16,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:16,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948087255] [2021-11-09 09:33:16,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:33:16,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:16,951 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:16,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:33:22,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 09:33:22,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:22,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 09:33:22,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:23,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:23,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337570437] [2021-11-09 09:33:23,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:23,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948087255] [2021-11-09 09:33:23,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948087255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:23,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:23,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 09:33:23,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728940193] [2021-11-09 09:33:23,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:33:23,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:23,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:33:23,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:33:23,154 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:23,637 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-11-09 09:33:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:33:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 09:33:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:23,638 INFO L225 Difference]: With dead ends: 66 [2021-11-09 09:33:23,638 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 09:33:23,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:33:23,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 09:33:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-09 09:33:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-11-09 09:33:23,644 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2021-11-09 09:33:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:23,644 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-11-09 09:33:23,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-11-09 09:33:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 09:33:23,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:23,646 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:23,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:23,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:33:23,856 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash -23194689, now seen corresponding path program 13 times [2021-11-09 09:33:23,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:23,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891282906] [2021-11-09 09:33:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:23,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:23,866 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:23,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26493153] [2021-11-09 09:33:23,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:33:23,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:23,868 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:23,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:33:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:24,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:33:24,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:24,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:24,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891282906] [2021-11-09 09:33:24,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:24,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26493153] [2021-11-09 09:33:24,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26493153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:24,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:24,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-09 09:33:24,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039831972] [2021-11-09 09:33:24,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:33:24,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:33:24,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:33:24,707 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:24,900 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-09 09:33:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:33:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-09 09:33:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:24,902 INFO L225 Difference]: With dead ends: 68 [2021-11-09 09:33:24,902 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 09:33:24,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:33:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 09:33:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-09 09:33:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-09 09:33:24,915 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2021-11-09 09:33:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:24,916 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-09 09:33:24,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-09 09:33:24,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:33:24,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:24,917 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:24,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:25,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:33:25,138 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash -768431912, now seen corresponding path program 13 times [2021-11-09 09:33:25,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:25,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743214601] [2021-11-09 09:33:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:25,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:25,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:25,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635541533] [2021-11-09 09:33:25,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:33:25,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:25,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:25,150 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:25,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:33:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 09:33:26,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:27,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:27,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743214601] [2021-11-09 09:33:27,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:27,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635541533] [2021-11-09 09:33:27,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635541533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:27,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:27,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 09:33:27,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777342865] [2021-11-09 09:33:27,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:33:27,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:33:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:33:27,212 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:27,742 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-09 09:33:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:33:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 09:33:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:27,744 INFO L225 Difference]: With dead ends: 70 [2021-11-09 09:33:27,744 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 09:33:27,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:33:27,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 09:33:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-09 09:33:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-09 09:33:27,751 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2021-11-09 09:33:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:27,752 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-09 09:33:27,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-09 09:33:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:33:27,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:27,753 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:27,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:27,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:27,962 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash 305682579, now seen corresponding path program 14 times [2021-11-09 09:33:27,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:27,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556774658] [2021-11-09 09:33:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:27,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:28,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:28,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965511024] [2021-11-09 09:33:28,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:28,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:28,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:28,017 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:28,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:33:28,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:28,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:33:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:28,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:28,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556774658] [2021-11-09 09:33:28,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:28,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965511024] [2021-11-09 09:33:28,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965511024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:28,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:28,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 09:33:28,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722885298] [2021-11-09 09:33:28,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:33:28,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:33:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:33:28,921 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:29,110 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-11-09 09:33:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:33:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 09:33:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:29,111 INFO L225 Difference]: With dead ends: 72 [2021-11-09 09:33:29,111 INFO L226 Difference]: Without dead ends: 68 [2021-11-09 09:33:29,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:33:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-09 09:33:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-09 09:33:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-09 09:33:29,117 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2021-11-09 09:33:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:29,118 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-09 09:33:29,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:29,118 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-09 09:33:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:33:29,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:29,118 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:29,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:29,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:29,322 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1750010028, now seen corresponding path program 14 times [2021-11-09 09:33:29,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:29,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508566158] [2021-11-09 09:33:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:29,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:29,333 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:29,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267655779] [2021-11-09 09:33:29,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:29,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:29,335 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:29,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:33:31,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:31,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:31,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 09:33:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:31,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:31,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508566158] [2021-11-09 09:33:31,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:31,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267655779] [2021-11-09 09:33:31,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267655779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:31,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:31,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 09:33:31,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020205831] [2021-11-09 09:33:31,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:33:31,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:33:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:33:31,799 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:32,530 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-11-09 09:33:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:33:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:33:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:32,531 INFO L225 Difference]: With dead ends: 74 [2021-11-09 09:33:32,531 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 09:33:32,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:33:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 09:33:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-09 09:33:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-09 09:33:32,538 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2021-11-09 09:33:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:32,539 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-09 09:33:32,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-09 09:33:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:33:32,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:32,540 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:32,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-09 09:33:32,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-09 09:33:32,746 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1833168025, now seen corresponding path program 15 times [2021-11-09 09:33:32,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:32,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715384919] [2021-11-09 09:33:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:32,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:32,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:32,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72026560] [2021-11-09 09:33:32,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:33:32,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:32,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:32,771 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:32,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:33:33,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-09 09:33:33,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:33:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:34,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:34,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715384919] [2021-11-09 09:33:34,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:34,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72026560] [2021-11-09 09:33:34,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72026560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:34,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:34,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 09:33:34,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092688608] [2021-11-09 09:33:34,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:33:34,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:34,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:33:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:33:34,290 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:34,510 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-09 09:33:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:33:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 09:33:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:34,511 INFO L225 Difference]: With dead ends: 76 [2021-11-09 09:33:34,511 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 09:33:34,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:33:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 09:33:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-09 09:33:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-09 09:33:34,520 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2021-11-09 09:33:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:34,520 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-09 09:33:34,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-09 09:33:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 09:33:34,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:34,522 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:34,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-09 09:33:34,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 09:33:34,726 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash -691052928, now seen corresponding path program 15 times [2021-11-09 09:33:34,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:34,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882391032] [2021-11-09 09:33:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:34,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:34,738 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:34,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628571291] [2021-11-09 09:33:34,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:33:34,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:34,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:34,740 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:34,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:33:36,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-09 09:33:36,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 09:33:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:37,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:37,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882391032] [2021-11-09 09:33:37,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:37,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628571291] [2021-11-09 09:33:37,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628571291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:37,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:37,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 09:33:37,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247180611] [2021-11-09 09:33:37,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:33:37,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:37,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:33:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:33:37,153 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:37,997 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-11-09 09:33:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:33:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 09:33:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:37,998 INFO L225 Difference]: With dead ends: 78 [2021-11-09 09:33:37,998 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 09:33:37,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:33:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 09:33:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-09 09:33:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-11-09 09:33:38,006 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2021-11-09 09:33:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:38,006 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-11-09 09:33:38,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-11-09 09:33:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 09:33:38,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:38,008 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:38,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:38,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:33:38,208 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1652442171, now seen corresponding path program 16 times [2021-11-09 09:33:38,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:38,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683198490] [2021-11-09 09:33:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:38,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:38,222 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:38,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027011056] [2021-11-09 09:33:38,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:33:38,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:38,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:38,238 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:38,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:33:39,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:33:39,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 09:33:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:39,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:39,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683198490] [2021-11-09 09:33:39,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:39,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027011056] [2021-11-09 09:33:39,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027011056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:39,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:39,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 09:33:39,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994296138] [2021-11-09 09:33:39,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:33:39,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:33:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:33:39,430 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:39,654 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-11-09 09:33:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:33:39,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 09:33:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:39,655 INFO L225 Difference]: With dead ends: 80 [2021-11-09 09:33:39,656 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 09:33:39,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:33:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 09:33:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-09 09:33:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-11-09 09:33:39,665 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2021-11-09 09:33:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:39,666 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-11-09 09:33:39,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-11-09 09:33:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 09:33:39,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:39,667 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:39,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:39,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 09:33:39,882 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1094145452, now seen corresponding path program 16 times [2021-11-09 09:33:39,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:39,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128322840] [2021-11-09 09:33:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:39,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:39,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:39,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872826045] [2021-11-09 09:33:39,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:33:39,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:39,900 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:39,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:33:41,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:33:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-09 09:33:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:42,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:42,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128322840] [2021-11-09 09:33:42,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:42,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872826045] [2021-11-09 09:33:42,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872826045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:42,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:42,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 09:33:42,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027955274] [2021-11-09 09:33:42,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:33:42,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:33:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:33:42,413 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:43,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:43,117 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-11-09 09:33:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:33:43,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-09 09:33:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:43,119 INFO L225 Difference]: With dead ends: 82 [2021-11-09 09:33:43,119 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 09:33:43,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:33:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 09:33:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-09 09:33:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-11-09 09:33:43,127 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-11-09 09:33:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:43,128 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-11-09 09:33:43,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-11-09 09:33:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 09:33:43,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:43,129 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:43,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:43,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:43,338 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash 827583247, now seen corresponding path program 17 times [2021-11-09 09:33:43,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:43,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870734635] [2021-11-09 09:33:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:43,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:43,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:43,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496101091] [2021-11-09 09:33:43,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:33:43,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:43,368 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:43,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:33:47,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-09 09:33:47,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:47,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:33:47,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:48,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:48,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870734635] [2021-11-09 09:33:48,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:48,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496101091] [2021-11-09 09:33:48,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496101091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:48,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:48,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 09:33:48,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745864251] [2021-11-09 09:33:48,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:33:48,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:33:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:33:48,302 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:48,560 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-11-09 09:33:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 09:33:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 09:33:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:48,562 INFO L225 Difference]: With dead ends: 84 [2021-11-09 09:33:48,562 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 09:33:48,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:33:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 09:33:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-09 09:33:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-11-09 09:33:48,569 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2021-11-09 09:33:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:48,569 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-11-09 09:33:48,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-11-09 09:33:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:33:48,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:48,570 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:48,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:48,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 09:33:48,774 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:48,774 INFO L85 PathProgramCache]: Analyzing trace with hash 785378344, now seen corresponding path program 17 times [2021-11-09 09:33:48,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:48,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387252171] [2021-11-09 09:33:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:48,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:48,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:48,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606539956] [2021-11-09 09:33:48,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:33:48,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:48,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:48,795 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:48,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:33:55,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-09 09:33:55,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 09:33:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:55,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:55,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387252171] [2021-11-09 09:33:55,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:55,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606539956] [2021-11-09 09:33:55,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606539956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:55,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:55,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-09 09:33:55,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931410258] [2021-11-09 09:33:55,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:33:55,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:33:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:33:55,744 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:56,452 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-11-09 09:33:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:33:56,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:33:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:56,454 INFO L225 Difference]: With dead ends: 86 [2021-11-09 09:33:56,454 INFO L226 Difference]: Without dead ends: 82 [2021-11-09 09:33:56,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:33:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-09 09:33:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-09 09:33:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-09 09:33:56,463 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2021-11-09 09:33:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:56,463 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-09 09:33:56,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-09 09:33:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:33:56,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:56,464 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:56,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-09 09:33:56,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:33:56,665 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1131280413, now seen corresponding path program 18 times [2021-11-09 09:33:56,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:56,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891031395] [2021-11-09 09:33:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:56,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:56,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:56,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604735757] [2021-11-09 09:33:56,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:33:56,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:56,704 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:56,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:33:58,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 09:33:58,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:58,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 09:33:58,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:59,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:59,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891031395] [2021-11-09 09:33:59,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:59,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604735757] [2021-11-09 09:33:59,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604735757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:59,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:59,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 09:33:59,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569844761] [2021-11-09 09:33:59,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:33:59,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:33:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:33:59,073 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:59,427 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-09 09:33:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:33:59,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:33:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:59,428 INFO L225 Difference]: With dead ends: 88 [2021-11-09 09:33:59,428 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 09:33:59,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:33:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 09:33:59,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-09 09:33:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-09 09:33:59,437 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2021-11-09 09:33:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:59,438 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-09 09:33:59,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-09 09:33:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:33:59,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:59,439 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:59,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:59,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:33:59,639 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash -486923268, now seen corresponding path program 18 times [2021-11-09 09:33:59,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:59,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553542672] [2021-11-09 09:33:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:59,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:59,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:59,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599676827] [2021-11-09 09:33:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:33:59,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:59,660 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:59,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:34:01,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 09:34:01,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:01,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 09:34:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:02,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:02,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553542672] [2021-11-09 09:34:02,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:34:02,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599676827] [2021-11-09 09:34:02,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599676827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:02,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:34:02,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-09 09:34:02,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329989329] [2021-11-09 09:34:02,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:34:02,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:34:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:34:02,624 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:03,182 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-11-09 09:34:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:34:03,183 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 09:34:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:03,183 INFO L225 Difference]: With dead ends: 90 [2021-11-09 09:34:03,184 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 09:34:03,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:34:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 09:34:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-09 09:34:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-11-09 09:34:03,191 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2021-11-09 09:34:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:03,192 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-11-09 09:34:03,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-11-09 09:34:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 09:34:03,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:03,192 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:03,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:03,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:34:03,393 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash 252549815, now seen corresponding path program 19 times [2021-11-09 09:34:03,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:03,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592561889] [2021-11-09 09:34:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:03,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:03,416 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:34:03,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795858577] [2021-11-09 09:34:03,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:34:03,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:03,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:03,418 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:03,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:34:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:34:04,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:05,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:05,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592561889] [2021-11-09 09:34:05,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:34:05,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795858577] [2021-11-09 09:34:05,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795858577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:05,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:34:05,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-09 09:34:05,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915756554] [2021-11-09 09:34:05,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:34:05,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:05,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:34:05,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:34:05,057 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:05,416 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-11-09 09:34:05,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 09:34:05,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-09 09:34:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:05,417 INFO L225 Difference]: With dead ends: 92 [2021-11-09 09:34:05,417 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 09:34:05,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:34:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 09:34:05,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-09 09:34:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-11-09 09:34:05,438 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2021-11-09 09:34:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:05,439 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-11-09 09:34:05,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-11-09 09:34:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 09:34:05,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:05,440 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:05,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:05,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:05,654 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:05,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2065935920, now seen corresponding path program 19 times [2021-11-09 09:34:05,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:05,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827946137] [2021-11-09 09:34:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:05,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:05,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:34:05,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609114639] [2021-11-09 09:34:05,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:34:05,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:05,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:05,684 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:05,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:34:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-09 09:34:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:08,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:08,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827946137] [2021-11-09 09:34:08,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:34:08,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609114639] [2021-11-09 09:34:08,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609114639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:08,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:34:08,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-09 09:34:08,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098197276] [2021-11-09 09:34:08,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:34:08,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:34:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:34:08,095 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:08,914 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-11-09 09:34:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:34:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 09:34:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:08,915 INFO L225 Difference]: With dead ends: 94 [2021-11-09 09:34:08,915 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 09:34:08,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:34:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 09:34:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-09 09:34:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-09 09:34:08,923 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85 [2021-11-09 09:34:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:08,923 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-09 09:34:08,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-09 09:34:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:34:08,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:08,925 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:08,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:09,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 09:34:09,130 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1055153269, now seen corresponding path program 20 times [2021-11-09 09:34:09,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:09,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601802332] [2021-11-09 09:34:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:09,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:09,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:34:09,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6882762] [2021-11-09 09:34:09,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:34:09,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:09,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:09,152 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:09,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:34:10,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:34:10,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-09 09:34:10,983 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 09:34:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 09:34:11,342 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 09:34:11,342 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-09 09:34:11,343 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:34:11,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:34:11,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:34:11,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:11,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 09:34:11,562 INFO L731 BasicCegarLoop]: Path program histogram: [20, 19, 3, 1] [2021-11-09 09:34:11,566 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 09:34:11,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 09:34:11 BoogieIcfgContainer [2021-11-09 09:34:11,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 09:34:11,670 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 09:34:11,670 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 09:34:11,671 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 09:34:11,671 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:49" (3/4) ... [2021-11-09 09:34:11,674 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-09 09:34:11,763 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 09:34:11,764 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 09:34:11,765 INFO L168 Benchmark]: Toolchain (without parser) took 83330.88 ms. Allocated memory was 86.0 MB in the beginning and 383.8 MB in the end (delta: 297.8 MB). Free memory was 49.7 MB in the beginning and 107.1 MB in the end (delta: -57.4 MB). Peak memory consumption was 240.6 MB. Max. memory is 16.1 GB. [2021-11-09 09:34:11,766 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory was 65.9 MB in the beginning and 65.9 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:34:11,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.53 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.4 MB in the beginning and 81.5 MB in the end (delta: -32.1 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-11-09 09:34:11,767 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.45 ms. Allocated memory is still 104.9 MB. Free memory was 81.5 MB in the beginning and 79.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:34:11,768 INFO L168 Benchmark]: Boogie Preprocessor took 45.51 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 79.0 MB in the end (delta: 904.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:34:11,768 INFO L168 Benchmark]: RCFGBuilder took 308.23 ms. Allocated memory is still 104.9 MB. Free memory was 78.8 MB in the beginning and 69.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 09:34:11,769 INFO L168 Benchmark]: TraceAbstraction took 82528.00 ms. Allocated memory was 104.9 MB in the beginning and 383.8 MB in the end (delta: 278.9 MB). Free memory was 68.9 MB in the beginning and 114.5 MB in the end (delta: -45.6 MB). Peak memory consumption was 235.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:34:11,769 INFO L168 Benchmark]: Witness Printer took 93.45 ms. Allocated memory is still 383.8 MB. Free memory was 114.5 MB in the beginning and 107.1 MB in the end (delta: 7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 09:34:11,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory was 65.9 MB in the beginning and 65.9 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.53 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.4 MB in the beginning and 81.5 MB in the end (delta: -32.1 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.45 ms. Allocated memory is still 104.9 MB. Free memory was 81.5 MB in the beginning and 79.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.51 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 79.0 MB in the end (delta: 904.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 308.23 ms. Allocated memory is still 104.9 MB. Free memory was 78.8 MB in the beginning and 69.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 82528.00 ms. Allocated memory was 104.9 MB in the beginning and 383.8 MB in the end (delta: 278.9 MB). Free memory was 68.9 MB in the beginning and 114.5 MB in the end (delta: -45.6 MB). Peak memory consumption was 235.1 MB. Max. memory is 16.1 GB. * Witness Printer took 93.45 ms. Allocated memory is still 383.8 MB. Free memory was 114.5 MB in the beginning and 107.1 MB in the end (delta: 7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=11] [L27] EXPR counter++ VAL [counter=12] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=12] [L27] EXPR counter++ VAL [counter=13] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=13] [L27] EXPR counter++ VAL [counter=14] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=14] [L27] EXPR counter++ VAL [counter=15] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=15] [L27] EXPR counter++ VAL [counter=16] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=16] [L27] EXPR counter++ VAL [counter=17] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=17] [L27] EXPR counter++ VAL [counter=18] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=18] [L27] EXPR counter++ VAL [counter=19] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=19] [L27] EXPR counter++ VAL [counter=20] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=20] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=20] [L27] EXPR counter++ VAL [counter=21] [L27] COND FALSE !(counter++<20) [L10] COND TRUE !(cond) VAL [counter=21] [L12] reach_error() VAL [counter=21] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 82.3s, OverallIterations: 43, TraceHistogramMax: 21, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 762 SDtfs, 176 SDslu, 7931 SDs, 0 SdLazy, 8271 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2066 GetRequests, 1343 SyntacticMatches, 0 SemanticMatches, 723 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=42, InterpolantAutomatonStates: 767, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 42 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 29.2s SatisfiabilityAnalysisTime, 15.1s InterpolantComputationTime, 1959 NumberOfCodeBlocks, 1951 NumberOfCodeBlocksAsserted, 250 NumberOfCheckSat, 1830 ConstructedInterpolants, 0 QuantifiedInterpolants, 9431 SizeOfPredicates, 283 NumberOfNonLiveVariables, 8952 ConjunctsInSsa, 1403 ConjunctsInUnsatCore, 42 InterpolantComputations, 1 PerfectInterpolantSequences, 20/10294 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-09 09:34:11,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20ce5ba6-cf7a-4a8d-90be-ef0e151af5b4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE