./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY --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 df76811034b688387cfe28dd1eb6de91c21580662ac8ddb8163b41c1d6179172 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:33:38,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:33:38,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:33:38,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:33:38,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:33:38,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:33:38,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:33:38,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:33:38,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:33:38,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:33:38,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:33:38,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:33:38,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:33:38,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:33:38,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:33:38,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:33:38,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:33:38,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:33:38,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:33:38,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:33:38,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:33:38,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:33:38,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:33:38,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:33:38,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:33:38,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:33:38,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:33:38,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:33:38,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:33:38,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:33:38,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:33:38,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:33:38,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:33:38,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:33:38,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:33:38,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:33:38,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:33:38,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:33:38,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:33:38,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:33:38,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:33:38,139 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:33:38,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:33:38,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:33:38,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:33:38,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:33:38,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:33:38,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:33:38,188 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:33:38,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:33:38,188 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:33:38,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:33:38,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:33:38,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:33:38,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:33:38,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:33:38,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:33:38,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:33:38,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:33:38,189 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:33:38,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:33:38,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:33:38,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:33:38,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:33:38,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:33:38,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:33:38,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:33:38,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:33:38,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:33:38,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:33:38,191 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:33:38,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:33:38,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:33:38,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:33:38,192 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_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df76811034b688387cfe28dd1eb6de91c21580662ac8ddb8163b41c1d6179172 [2021-11-07 08:33:38,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:33:38,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:33:38,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:33:38,479 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:33:38,480 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:33:38,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c [2021-11-07 08:33:38,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/data/44b747c85/9818a68cfd3b474698bec4830f12cdfa/FLAG1c21db705 [2021-11-07 08:33:38,997 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:33:38,997 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c [2021-11-07 08:33:39,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/data/44b747c85/9818a68cfd3b474698bec4830f12cdfa/FLAG1c21db705 [2021-11-07 08:33:39,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/data/44b747c85/9818a68cfd3b474698bec4830f12cdfa [2021-11-07 08:33:39,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:33:39,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:33:39,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:33:39,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:33:39,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:33:39,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635422f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39, skipping insertion in model container [2021-11-07 08:33:39,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:33:39,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:33:39,596 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_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c[333,346] [2021-11-07 08:33:39,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:33:39,646 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:33:39,657 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_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c[333,346] [2021-11-07 08:33:39,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:33:39,681 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:33:39,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39 WrapperNode [2021-11-07 08:33:39,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:33:39,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:33:39,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:33:39,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:33:39,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:33:39,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:33:39,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:33:39,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:33:39,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:33:39,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:33:39,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:33:39,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:33:39,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (1/1) ... [2021-11-07 08:33:39,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:33:39,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:39,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:33:39,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:33:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:33:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:33:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:33:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:33:39,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:33:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:33:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:33:40,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:33:40,038 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-07 08:33:40,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:33:40 BoogieIcfgContainer [2021-11-07 08:33:40,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:33:40,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:33:40,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:33:40,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:33:40,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:33:39" (1/3) ... [2021-11-07 08:33:40,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394ff230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:33:40, skipping insertion in model container [2021-11-07 08:33:40,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:33:39" (2/3) ... [2021-11-07 08:33:40,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394ff230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:33:40, skipping insertion in model container [2021-11-07 08:33:40,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:33:40" (3/3) ... [2021-11-07 08:33:40,049 INFO L111 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2021-11-07 08:33:40,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:33:40,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:33:40,107 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:33:40,115 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 [2021-11-07 08:33:40,115 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:33:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 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) [2021-11-07 08:33:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:33:40,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:40,138 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:40,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash 468841592, now seen corresponding path program 1 times [2021-11-07 08:33:40,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:40,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237183403] [2021-11-07 08:33:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:40,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:40,256 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:40,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411984486] [2021-11-07 08:33:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:40,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:40,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:40,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:40,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:33:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:40,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 08:33:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:40,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:40,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237183403] [2021-11-07 08:33:40,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:40,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411984486] [2021-11-07 08:33:40,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411984486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:40,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:40,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:33:40,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566128845] [2021-11-07 08:33:40,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:33:40,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:40,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:33:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:33:40,455 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-07 08:33:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:40,473 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2021-11-07 08:33:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:33:40,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-07 08:33:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:40,484 INFO L225 Difference]: With dead ends: 40 [2021-11-07 08:33:40,484 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 08:33:40,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:33:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 08:33:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 08:33:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-11-07 08:33:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-07 08:33:40,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2021-11-07 08:33:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:40,523 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-07 08:33:40,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-07 08:33:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-07 08:33:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:33:40,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:40,524 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:40,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:40,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:40,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:40,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash -386465062, now seen corresponding path program 1 times [2021-11-07 08:33:40,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:40,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727512465] [2021-11-07 08:33:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:40,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:40,760 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:40,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143460830] [2021-11-07 08:33:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:40,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:40,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:40,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:40,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:33:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:40,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:33:40,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:40,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:40,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727512465] [2021-11-07 08:33:40,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:40,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143460830] [2021-11-07 08:33:40,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143460830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:40,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:40,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:40,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146899574] [2021-11-07 08:33:40,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:40,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:40,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:40,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:40,940 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-07 08:33:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:40,992 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-11-07 08:33:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-07 08:33:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:40,995 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:33:40,997 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 08:33:40,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 08:33:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-11-07 08:33:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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) [2021-11-07 08:33:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-11-07 08:33:41,007 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2021-11-07 08:33:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:41,008 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-11-07 08:33:41,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-07 08:33:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-11-07 08:33:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:33:41,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:41,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:41,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 08:33:41,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:41,247 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:41,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash 750439074, now seen corresponding path program 1 times [2021-11-07 08:33:41,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:41,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992272343] [2021-11-07 08:33:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:41,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:41,261 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:41,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073223337] [2021-11-07 08:33:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:41,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:41,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:41,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:41,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:33:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:41,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:33:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:41,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:41,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992272343] [2021-11-07 08:33:41,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:41,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073223337] [2021-11-07 08:33:41,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073223337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:41,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:41,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:33:41,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006865310] [2021-11-07 08:33:41,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:33:41,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:33:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:33:41,439 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-07 08:33:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:41,517 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-11-07 08:33:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:33:41,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-11-07 08:33:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:41,520 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:33:41,520 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 08:33:41,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:33:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 08:33:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-11-07 08:33:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) 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) [2021-11-07 08:33:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-07 08:33:41,540 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2021-11-07 08:33:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:41,541 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-07 08:33:41,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-07 08:33:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-07 08:33:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:33:41,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:41,544 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:41,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:41,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-07 08:33:41,759 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1168938424, now seen corresponding path program 1 times [2021-11-07 08:33:41,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:41,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436309194] [2021-11-07 08:33:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:41,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:41,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:41,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013778466] [2021-11-07 08:33:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:41,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:41,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:41,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:41,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:33:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:33:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:41,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:41,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436309194] [2021-11-07 08:33:41,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:41,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013778466] [2021-11-07 08:33:41,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013778466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:41,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:41,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:33:41,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089470634] [2021-11-07 08:33:41,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:33:41,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:33:41,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:33:41,945 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-11-07 08:33:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:41,988 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-11-07 08:33:41,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:33:41,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2021-11-07 08:33:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:41,990 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:33:41,990 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 08:33:41,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:33:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 08:33:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-07 08:33:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2021-11-07 08:33:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-07 08:33:41,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2021-11-07 08:33:41,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:41,996 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-07 08:33:41,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-11-07 08:33:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-07 08:33:41,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:33:41,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:41,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:42,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:42,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:42,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 18975699, now seen corresponding path program 1 times [2021-11-07 08:33:42,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:42,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071777313] [2021-11-07 08:33:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:42,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:42,211 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:42,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630158467] [2021-11-07 08:33:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:42,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:42,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:42,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:33:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:33:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:42,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:42,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071777313] [2021-11-07 08:33:42,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:42,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630158467] [2021-11-07 08:33:42,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630158467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:42,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:42,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 08:33:42,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968133645] [2021-11-07 08:33:42,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:33:42,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:33:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:33:42,373 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:42,459 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-11-07 08:33:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:33:42,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 08:33:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:42,460 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:33:42,460 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 08:33:42,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:33:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 08:33:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-11-07 08:33:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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) [2021-11-07 08:33:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-07 08:33:42,470 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2021-11-07 08:33:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:42,471 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-07 08:33:42,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-07 08:33:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:33:42,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:42,472 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:42,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:42,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:42,673 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1270130408, now seen corresponding path program 2 times [2021-11-07 08:33:42,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:42,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301281524] [2021-11-07 08:33:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:42,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:42,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:42,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770569080] [2021-11-07 08:33:42,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:33:42,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:42,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:42,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:42,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:33:42,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:33:42,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:33:42,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:42,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:42,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301281524] [2021-11-07 08:33:42,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:42,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770569080] [2021-11-07 08:33:42,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770569080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:42,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:42,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 08:33:42,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095517864] [2021-11-07 08:33:42,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:33:42,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:42,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:33:42,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:33:42,879 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-11-07 08:33:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:42,944 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-11-07 08:33:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:33:42,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 [2021-11-07 08:33:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:42,945 INFO L225 Difference]: With dead ends: 62 [2021-11-07 08:33:42,945 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 08:33:42,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:33:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 08:33:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-11-07 08:33:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2021-11-07 08:33:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-07 08:33:42,952 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2021-11-07 08:33:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:42,952 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-07 08:33:42,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-11-07 08:33:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-07 08:33:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:33:42,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:42,953 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:42,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:43,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:33:43,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1717253235, now seen corresponding path program 3 times [2021-11-07 08:33:43,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:43,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558609745] [2021-11-07 08:33:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:43,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:43,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:43,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600534832] [2021-11-07 08:33:43,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:33:43,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:43,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:43,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:43,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:33:43,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 08:33:43,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:43,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:33:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:33:43,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:43,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558609745] [2021-11-07 08:33:43,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:43,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600534832] [2021-11-07 08:33:43,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600534832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:43,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:43,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-07 08:33:43,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396538166] [2021-11-07 08:33:43,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:33:43,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:43,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:33:43,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:33:43,413 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:43,463 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-11-07 08:33:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:33:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 08:33:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:43,464 INFO L225 Difference]: With dead ends: 65 [2021-11-07 08:33:43,465 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 08:33:43,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:33:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 08:33:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2021-11-07 08:33:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-11-07 08:33:43,473 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2021-11-07 08:33:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:43,473 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-11-07 08:33:43,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-11-07 08:33:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:33:43,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:43,475 INFO L513 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:43,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:43,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:43,695 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash -939344134, now seen corresponding path program 4 times [2021-11-07 08:33:43,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:43,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167093755] [2021-11-07 08:33:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:43,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:43,718 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:43,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281174367] [2021-11-07 08:33:43,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:33:43,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:43,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:43,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:43,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:33:43,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:33:43,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:43,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:33:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:33:43,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:43,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167093755] [2021-11-07 08:33:43,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:43,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281174367] [2021-11-07 08:33:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281174367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:43,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:43,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-07 08:33:43,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438994607] [2021-11-07 08:33:43,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:33:43,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:43,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:33:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:33:43,993 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-11-07 08:33:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:44,132 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2021-11-07 08:33:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:33:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 [2021-11-07 08:33:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:44,134 INFO L225 Difference]: With dead ends: 122 [2021-11-07 08:33:44,134 INFO L226 Difference]: Without dead ends: 93 [2021-11-07 08:33:44,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:33:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-07 08:33:44,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2021-11-07 08:33:44,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 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) [2021-11-07 08:33:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2021-11-07 08:33:44,147 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 27 [2021-11-07 08:33:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:44,147 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2021-11-07 08:33:44,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-11-07 08:33:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2021-11-07 08:33:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:33:44,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:44,149 INFO L513 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:44,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:44,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:44,365 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:44,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2028398182, now seen corresponding path program 5 times [2021-11-07 08:33:44,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:44,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644240245] [2021-11-07 08:33:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:44,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:44,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:44,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709823887] [2021-11-07 08:33:44,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:33:44,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:44,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:44,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:44,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:33:44,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-07 08:33:44,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:33:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 08:33:45,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:45,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644240245] [2021-11-07 08:33:45,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:45,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709823887] [2021-11-07 08:33:45,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709823887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:45,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:45,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:33:45,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027116371] [2021-11-07 08:33:45,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:33:45,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:45,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:33:45,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:33:45,015 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2021-11-07 08:33:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:45,263 INFO L93 Difference]: Finished difference Result 170 states and 205 transitions. [2021-11-07 08:33:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:33:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) Word has length 39 [2021-11-07 08:33:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:45,265 INFO L225 Difference]: With dead ends: 170 [2021-11-07 08:33:45,265 INFO L226 Difference]: Without dead ends: 123 [2021-11-07 08:33:45,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:33:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-07 08:33:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-11-07 08:33:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.255813953488372) internal successors, (108), 86 states have internal predecessors, (108), 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) [2021-11-07 08:33:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2021-11-07 08:33:45,291 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 39 [2021-11-07 08:33:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:45,291 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2021-11-07 08:33:45,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2021-11-07 08:33:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2021-11-07 08:33:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 08:33:45,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:45,295 INFO L513 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:45,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:45,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:45,500 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash -804241990, now seen corresponding path program 6 times [2021-11-07 08:33:45,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:45,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829185907] [2021-11-07 08:33:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:45,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:45,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:45,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412417614] [2021-11-07 08:33:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:33:45,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:45,511 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:45,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:33:45,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-07 08:33:45,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:45,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:33:45,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 201 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-07 08:33:45,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:45,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829185907] [2021-11-07 08:33:45,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:45,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412417614] [2021-11-07 08:33:45,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412417614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:45,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:45,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:33:45,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432756543] [2021-11-07 08:33:45,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:33:45,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:45,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:33:45,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:45,833 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:45,897 INFO L93 Difference]: Finished difference Result 196 states and 248 transitions. [2021-11-07 08:33:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:33:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 08:33:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:45,899 INFO L225 Difference]: With dead ends: 196 [2021-11-07 08:33:45,899 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 08:33:45,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 08:33:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2021-11-07 08:33:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2475247524752475) internal successors, (126), 101 states have internal predecessors, (126), 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) [2021-11-07 08:33:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2021-11-07 08:33:45,917 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 51 [2021-11-07 08:33:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:45,917 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2021-11-07 08:33:45,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2021-11-07 08:33:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:33:45,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:45,919 INFO L513 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:45,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:46,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:46,146 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:46,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:46,147 INFO L85 PathProgramCache]: Analyzing trace with hash 597276054, now seen corresponding path program 7 times [2021-11-07 08:33:46,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:46,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399581670] [2021-11-07 08:33:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:46,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:46,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:46,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259649528] [2021-11-07 08:33:46,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:33:46,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:46,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:46,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:46,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:33:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:33:46,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-07 08:33:46,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:46,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399581670] [2021-11-07 08:33:46,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:46,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259649528] [2021-11-07 08:33:46,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259649528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:46,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:46,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-07 08:33:46,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148374056] [2021-11-07 08:33:46,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:33:46,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:33:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:33:46,542 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-11-07 08:33:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:46,618 INFO L93 Difference]: Finished difference Result 227 states and 284 transitions. [2021-11-07 08:33:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:33:46,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 57 [2021-11-07 08:33:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:46,620 INFO L225 Difference]: With dead ends: 227 [2021-11-07 08:33:46,620 INFO L226 Difference]: Without dead ends: 134 [2021-11-07 08:33:46,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:33:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-07 08:33:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2021-11-07 08:33:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 116 states have internal predecessors, (144), 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) [2021-11-07 08:33:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2021-11-07 08:33:46,652 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 57 [2021-11-07 08:33:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:46,652 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2021-11-07 08:33:46,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-11-07 08:33:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2021-11-07 08:33:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:33:46,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:46,655 INFO L513 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:46,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:46,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:33:46,871 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1929398778, now seen corresponding path program 8 times [2021-11-07 08:33:46,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:46,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007410662] [2021-11-07 08:33:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:46,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:46,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:46,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578864940] [2021-11-07 08:33:46,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:33:46,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:46,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:46,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:46,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:33:47,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:33:47,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:47,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:33:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-07 08:33:47,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:47,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007410662] [2021-11-07 08:33:47,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:47,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578864940] [2021-11-07 08:33:47,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578864940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:47,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:47,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:33:47,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993166338] [2021-11-07 08:33:47,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:33:47,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:33:47,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:33:47,257 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-11-07 08:33:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:47,334 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2021-11-07 08:33:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:33:47,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 [2021-11-07 08:33:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:47,336 INFO L225 Difference]: With dead ends: 258 [2021-11-07 08:33:47,336 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 08:33:47,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:33:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 08:33:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2021-11-07 08:33:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2366412213740459) internal successors, (162), 131 states have internal predecessors, (162), 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) [2021-11-07 08:33:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2021-11-07 08:33:47,353 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 63 [2021-11-07 08:33:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:47,353 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2021-11-07 08:33:47,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-11-07 08:33:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2021-11-07 08:33:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 08:33:47,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:47,355 INFO L513 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:47,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:47,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:33:47,571 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:47,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1555635498, now seen corresponding path program 9 times [2021-11-07 08:33:47,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:47,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986205578] [2021-11-07 08:33:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:47,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:47,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:47,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501238737] [2021-11-07 08:33:47,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:33:47,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:47,587 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:47,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:33:48,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 08:33:48,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:33:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 260 proven. 21 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2021-11-07 08:33:48,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:48,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986205578] [2021-11-07 08:33:48,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:48,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501238737] [2021-11-07 08:33:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501238737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:48,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:48,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-07 08:33:48,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102526108] [2021-11-07 08:33:48,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:33:48,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:33:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:33:48,372 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-11-07 08:33:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:48,459 INFO L93 Difference]: Finished difference Result 289 states and 356 transitions. [2021-11-07 08:33:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:33:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 69 [2021-11-07 08:33:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:48,462 INFO L225 Difference]: With dead ends: 289 [2021-11-07 08:33:48,462 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 08:33:48,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:33:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 08:33:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 147. [2021-11-07 08:33:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.2328767123287672) internal successors, (180), 146 states have internal predecessors, (180), 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) [2021-11-07 08:33:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2021-11-07 08:33:48,479 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 69 [2021-11-07 08:33:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:48,479 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2021-11-07 08:33:48,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-11-07 08:33:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2021-11-07 08:33:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:33:48,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:48,481 INFO L513 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:48,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:48,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:48,707 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2132596282, now seen corresponding path program 10 times [2021-11-07 08:33:48,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:48,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086773468] [2021-11-07 08:33:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:48,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:48,732 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:48,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192265947] [2021-11-07 08:33:48,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:33:48,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:48,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:48,735 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:48,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:33:48,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:33:48,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:48,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:33:48,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 624 proven. 208 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-07 08:33:49,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:49,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086773468] [2021-11-07 08:33:49,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:49,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192265947] [2021-11-07 08:33:49,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192265947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:49,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:49,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-07 08:33:49,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628952438] [2021-11-07 08:33:49,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:33:49,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:49,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:33:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:33:49,328 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:49,575 INFO L93 Difference]: Finished difference Result 366 states and 441 transitions. [2021-11-07 08:33:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:33:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 08:33:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:49,579 INFO L225 Difference]: With dead ends: 366 [2021-11-07 08:33:49,579 INFO L226 Difference]: Without dead ends: 253 [2021-11-07 08:33:49,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:33:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-07 08:33:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2021-11-07 08:33:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.231578947368421) internal successors, (234), 190 states have internal predecessors, (234), 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) [2021-11-07 08:33:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 234 transitions. [2021-11-07 08:33:49,603 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 234 transitions. Word has length 75 [2021-11-07 08:33:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:49,604 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 234 transitions. [2021-11-07 08:33:49,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 234 transitions. [2021-11-07 08:33:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 08:33:49,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:49,606 INFO L513 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:49,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:49,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:49,827 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:49,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1310270298, now seen corresponding path program 11 times [2021-11-07 08:33:49,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:49,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352983379] [2021-11-07 08:33:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:49,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:49,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:49,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197945041] [2021-11-07 08:33:49,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:33:49,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:49,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:49,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7807d47b-5e17-47f8-837a-c9f0e5b47b6b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process