./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-memory-alloca/fermat-alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-memory-alloca/fermat-alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e779827438904e8a0bb49f414cbe4d14072e556fff2389d3772808230457c73c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:06:43,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:06:43,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:06:43,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:06:43,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:06:43,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:06:43,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:06:43,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:06:43,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:06:43,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:06:43,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:06:43,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:06:43,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:06:43,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:06:43,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:06:43,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:06:43,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:06:43,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:06:43,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:06:43,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:06:43,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:06:43,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:06:43,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:06:43,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:06:43,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:06:43,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:06:43,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:06:43,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:06:43,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:06:43,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:06:43,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:06:43,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:06:43,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:06:43,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:06:43,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:06:43,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:06:43,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:06:43,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:06:43,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:06:43,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:06:43,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:06:43,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-23 14:06:43,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:06:43,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:06:43,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:06:43,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:06:43,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:06:43,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:06:43,538 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:06:43,538 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-23 14:06:43,538 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-23 14:06:43,539 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-23 14:06:43,539 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-23 14:06:43,539 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-23 14:06:43,539 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-23 14:06:43,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:06:43,540 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 14:06:43,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:06:43,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:06:43,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-23 14:06:43,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-23 14:06:43,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-23 14:06:43,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:06:43,542 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-23 14:06:43,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:06:43,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-23 14:06:43,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:06:43,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:06:43,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:06:43,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:06:43,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:06:43,545 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-23 14:06:43,545 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e779827438904e8a0bb49f414cbe4d14072e556fff2389d3772808230457c73c [2021-11-23 14:06:43,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:06:43,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:06:43,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:06:43,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:06:43,849 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:06:43,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/termination-memory-alloca/fermat-alloca.i [2021-11-23 14:06:43,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/data/247570c46/2546bbd29a1049bea267247c70ac7631/FLAGea0add028 [2021-11-23 14:06:44,442 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:06:44,443 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/sv-benchmarks/c/termination-memory-alloca/fermat-alloca.i [2021-11-23 14:06:44,455 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/data/247570c46/2546bbd29a1049bea267247c70ac7631/FLAGea0add028 [2021-11-23 14:06:44,750 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/data/247570c46/2546bbd29a1049bea267247c70ac7631 [2021-11-23 14:06:44,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:06:44,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:06:44,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:06:44,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:06:44,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:06:44,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:44" (1/1) ... [2021-11-23 14:06:44,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d634809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:44, skipping insertion in model container [2021-11-23 14:06:44,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:44" (1/1) ... [2021-11-23 14:06:44,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:06:44,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:06:45,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:06:45,171 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:06:45,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:06:45,266 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:06:45,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45 WrapperNode [2021-11-23 14:06:45,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:06:45,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:06:45,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:06:45,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:06:45,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,333 INFO L137 Inliner]: procedures = 109, calls = 45, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2021-11-23 14:06:45,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:06:45,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:06:45,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:06:45,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:06:45,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:06:45,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:06:45,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:06:45,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:06:45,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (1/1) ... [2021-11-23 14:06:45,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 14:06:45,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:06:45,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 14:06:45,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-23 14:06:45,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 14:06:45,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 14:06:45,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 14:06:45,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 14:06:45,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:06:45,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:06:45,549 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:06:45,551 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:06:45,736 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:06:45,742 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:06:45,742 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:06:45,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:45 BoogieIcfgContainer [2021-11-23 14:06:45,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:06:45,746 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-23 14:06:45,746 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-23 14:06:45,749 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-23 14:06:45,750 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-23 14:06:45,750 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 02:06:44" (1/3) ... [2021-11-23 14:06:45,752 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4b9c9077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 02:06:45, skipping insertion in model container [2021-11-23 14:06:45,752 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-23 14:06:45,752 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:45" (2/3) ... [2021-11-23 14:06:45,752 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4b9c9077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 02:06:45, skipping insertion in model container [2021-11-23 14:06:45,753 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-23 14:06:45,753 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:45" (3/3) ... [2021-11-23 14:06:45,754 INFO L388 chiAutomizerObserver]: Analyzing ICFG fermat-alloca.i [2021-11-23 14:06:45,803 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-23 14:06:45,803 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-23 14:06:45,803 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-23 14:06:45,803 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-23 14:06:45,803 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-23 14:06:45,803 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-23 14:06:45,804 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-23 14:06:45,804 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-23 14:06:45,819 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:45,839 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:06:45,840 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 14:06:45,840 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 14:06:45,846 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-23 14:06:45,847 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:45,847 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-23 14:06:45,847 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:45,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:06:45,849 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 14:06:45,849 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 14:06:45,850 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-23 14:06:45,850 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:45,858 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier; 11#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc2#1.base, main_#t~malloc2#1.offset, main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~malloc4#1.base, main_#t~malloc4#1.offset, main_#t~malloc5#1.base, main_#t~malloc5#1.offset, main_#t~mem6#1, main_#t~mem7#1, main_#t~mem8#1, main_#t~mem9#1, main_#t~mem10#1, main_#t~mem11#1, main_#t~mem12#1, main_#t~mem13#1, main_#t~mem14#1, main_#t~mem15#1, main_#t~post16#1, main_#t~mem17#1, main_#t~mem18#1, main_#t~mem19#1, main_#t~post20#1, main_#t~mem21#1, main_#t~mem22#1, main_#t~mem23#1, main_#t~post24#1, main_#t~mem25#1, main_#t~mem26#1, main_~MAX~0#1.base, main_~MAX~0#1.offset, main_~a~0#1.base, main_~a~0#1.offset, main_~b~0#1.base, main_~b~0#1.offset, main_~c~0#1.base, main_~c~0#1.offset;call main_#t~malloc2#1.base, main_#t~malloc2#1.offset := #Ultimate.allocOnStack(4);main_~MAX~0#1.base, main_~MAX~0#1.offset := main_#t~malloc2#1.base, main_#t~malloc2#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnStack(4);main_~a~0#1.base, main_~a~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;call main_#t~malloc4#1.base, main_#t~malloc4#1.offset := #Ultimate.allocOnStack(4);main_~b~0#1.base, main_~b~0#1.offset := main_#t~malloc4#1.base, main_#t~malloc4#1.offset;call main_#t~malloc5#1.base, main_#t~malloc5#1.offset := #Ultimate.allocOnStack(4);main_~c~0#1.base, main_~c~0#1.offset := main_#t~malloc5#1.base, main_#t~malloc5#1.offset;call write~int(1000, main_~MAX~0#1.base, main_~MAX~0#1.offset, 4);call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call write~int(1, main_~c~0#1.base, main_~c~0#1.offset, 4); 9#L556-2true [2021-11-23 14:06:45,859 INFO L793 eck$LassoCheckResult]: Loop: 9#L556-2true assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 14#L557true assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 7#L561true assume main_#t~mem17#1 > main_#t~mem18#1;havoc main_#t~mem17#1;havoc main_#t~mem18#1;call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem19#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);main_#t~post20#1 := main_#t~mem19#1;call write~int(1 + main_#t~post20#1, main_~b~0#1.base, main_~b~0#1.offset, 4);havoc main_#t~mem19#1;havoc main_#t~post20#1; 10#L561-2true call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 5#L565true assume main_#t~mem21#1 > main_#t~mem22#1;havoc main_#t~mem21#1;havoc main_#t~mem22#1;call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem23#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);main_#t~post24#1 := main_#t~mem23#1;call write~int(1 + main_#t~post24#1, main_~c~0#1.base, main_~c~0#1.offset, 4);havoc main_#t~mem23#1;havoc main_#t~post24#1; 12#L565-2true call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 4#L569true assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 9#L556-2true [2021-11-23 14:06:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:45,866 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-11-23 14:06:45,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:45,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462512912] [2021-11-23 14:06:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:45,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:06:46,133 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:06:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:06:46,262 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:06:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:46,269 INFO L85 PathProgramCache]: Analyzing trace with hash -903226603, now seen corresponding path program 1 times [2021-11-23 14:06:46,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:46,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431881041] [2021-11-23 14:06:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:46,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:46,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:06:46,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057175873] [2021-11-23 14:06:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:46,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:06:46,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:06:46,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:06:46,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:06:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:06:49,257 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:06:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:06:49,315 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:06:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash 643070227, now seen corresponding path program 1 times [2021-11-23 14:06:49,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:49,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120548984] [2021-11-23 14:06:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:49,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:49,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:06:49,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135578496] [2021-11-23 14:06:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:49,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:06:49,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:06:49,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:06:49,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 14:06:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:49,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 14:06:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:06:49,656 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 14:06:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2021-11-23 14:06:49,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 29 [2021-11-23 14:06:49,975 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 14:06:49,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2021-11-23 14:06:50,224 INFO L354 Elim1Store]: treesize reduction 228, result has 15.9 percent of original size [2021-11-23 14:06:50,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 119 treesize of output 107 [2021-11-23 14:06:50,371 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 14:06:50,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-11-23 14:06:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:50,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:06:50,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:50,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120548984] [2021-11-23 14:06:50,697 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 14:06:50,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135578496] [2021-11-23 14:06:50,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135578496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:50,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:50,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 14:06:50,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833743705] [2021-11-23 14:06:50,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:07:05,255 WARN L227 SmtUtils]: Spent 14.55s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-23 14:07:06,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:07:06,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:07:06,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:07:06,995 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2021-11-23 14:07:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:07:07,074 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-11-23 14:07:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:07:07,081 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 37 transitions. [2021-11-23 14:07:07,085 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:07:07,090 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 20 states and 24 transitions. [2021-11-23 14:07:07,091 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-11-23 14:07:07,092 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-11-23 14:07:07,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 24 transitions. [2021-11-23 14:07:07,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:07:07,093 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-23 14:07:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 24 transitions. [2021-11-23 14:07:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-11-23 14:07:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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) [2021-11-23 14:07:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 14:07:07,122 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 14:07:07,122 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 14:07:07,122 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-23 14:07:07,122 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 17 transitions. [2021-11-23 14:07:07,123 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:07:07,123 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 14:07:07,124 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 14:07:07,124 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-11-23 14:07:07,124 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:07,125 INFO L791 eck$LassoCheckResult]: Stem: 88#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier; 89#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc2#1.base, main_#t~malloc2#1.offset, main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~malloc4#1.base, main_#t~malloc4#1.offset, main_#t~malloc5#1.base, main_#t~malloc5#1.offset, main_#t~mem6#1, main_#t~mem7#1, main_#t~mem8#1, main_#t~mem9#1, main_#t~mem10#1, main_#t~mem11#1, main_#t~mem12#1, main_#t~mem13#1, main_#t~mem14#1, main_#t~mem15#1, main_#t~post16#1, main_#t~mem17#1, main_#t~mem18#1, main_#t~mem19#1, main_#t~post20#1, main_#t~mem21#1, main_#t~mem22#1, main_#t~mem23#1, main_#t~post24#1, main_#t~mem25#1, main_#t~mem26#1, main_~MAX~0#1.base, main_~MAX~0#1.offset, main_~a~0#1.base, main_~a~0#1.offset, main_~b~0#1.base, main_~b~0#1.offset, main_~c~0#1.base, main_~c~0#1.offset;call main_#t~malloc2#1.base, main_#t~malloc2#1.offset := #Ultimate.allocOnStack(4);main_~MAX~0#1.base, main_~MAX~0#1.offset := main_#t~malloc2#1.base, main_#t~malloc2#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnStack(4);main_~a~0#1.base, main_~a~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;call main_#t~malloc4#1.base, main_#t~malloc4#1.offset := #Ultimate.allocOnStack(4);main_~b~0#1.base, main_~b~0#1.offset := main_#t~malloc4#1.base, main_#t~malloc4#1.offset;call main_#t~malloc5#1.base, main_#t~malloc5#1.offset := #Ultimate.allocOnStack(4);main_~c~0#1.base, main_~c~0#1.offset := main_#t~malloc5#1.base, main_#t~malloc5#1.offset;call write~int(1000, main_~MAX~0#1.base, main_~MAX~0#1.offset, 4);call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call write~int(1, main_~c~0#1.base, main_~c~0#1.offset, 4); 92#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 95#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 94#L561 assume !(main_#t~mem17#1 > main_#t~mem18#1);havoc main_#t~mem17#1;havoc main_#t~mem18#1; 87#L561-2 [2021-11-23 14:07:07,125 INFO L793 eck$LassoCheckResult]: Loop: 87#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 93#L565 assume main_#t~mem21#1 > main_#t~mem22#1;havoc main_#t~mem21#1;havoc main_#t~mem22#1;call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem23#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);main_#t~post24#1 := main_#t~mem23#1;call write~int(1 + main_#t~post24#1, main_~c~0#1.base, main_~c~0#1.offset, 4);havoc main_#t~mem23#1;havoc main_#t~post24#1; 85#L565-2 call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 82#L569 assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 83#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 90#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 86#L561 assume main_#t~mem17#1 > main_#t~mem18#1;havoc main_#t~mem17#1;havoc main_#t~mem18#1;call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem19#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);main_#t~post20#1 := main_#t~mem19#1;call write~int(1 + main_#t~post20#1, main_~b~0#1.base, main_~b~0#1.offset, 4);havoc main_#t~mem19#1;havoc main_#t~post20#1; 87#L561-2 [2021-11-23 14:07:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 28699821, now seen corresponding path program 1 times [2021-11-23 14:07:07,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:07,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612718668] [2021-11-23 14:07:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:07,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:07,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:07,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427769864] [2021-11-23 14:07:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:07,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:07,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:07,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 14:07:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:07,259 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:07:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:07,294 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:07:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1453675845, now seen corresponding path program 2 times [2021-11-23 14:07:07,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889356949] [2021-11-23 14:07:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:07,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:07,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:07,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230996009] [2021-11-23 14:07:07,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:07:07,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:07,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:07,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 14:07:07,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 14:07:07,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-23 14:07:07,407 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:07:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:07,434 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:07:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1341656857, now seen corresponding path program 1 times [2021-11-23 14:07:07,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:07,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963037972] [2021-11-23 14:07:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:07,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:07,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:07,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626395355] [2021-11-23 14:07:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:07,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:07,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:07,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 14:07:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:07:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 14:07:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:07:07,655 INFO L354 Elim1Store]: treesize reduction 119, result has 27.0 percent of original size [2021-11-23 14:07:07,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 65 [2021-11-23 14:07:07,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2021-11-23 14:07:08,023 INFO L354 Elim1Store]: treesize reduction 94, result has 34.7 percent of original size [2021-11-23 14:07:08,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 104 [2021-11-23 14:07:10,351 INFO L354 Elim1Store]: treesize reduction 8, result has 86.9 percent of original size [2021-11-23 14:07:10,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 94 [2021-11-23 14:07:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:10,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:07:10,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:07:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963037972] [2021-11-23 14:07:10,484 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 14:07:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626395355] [2021-11-23 14:07:10,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626395355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:07:10,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:07:10,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 14:07:10,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725720583] [2021-11-23 14:07:10,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:07:23,462 WARN L227 SmtUtils]: Spent 12.97s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-23 14:07:24,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:07:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:07:24,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:07:24,477 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. cyclomatic complexity: 4 Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-23 14:07:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:07:24,509 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-11-23 14:07:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:07:24,510 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 19 transitions. [2021-11-23 14:07:24,511 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:07:24,512 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 19 transitions. [2021-11-23 14:07:24,512 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-11-23 14:07:24,513 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-11-23 14:07:24,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 19 transitions. [2021-11-23 14:07:24,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:07:24,513 INFO L681 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-23 14:07:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 19 transitions. [2021-11-23 14:07:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-11-23 14:07:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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) [2021-11-23 14:07:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 14:07:24,516 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 14:07:24,516 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 14:07:24,516 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-23 14:07:24,517 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 17 transitions. [2021-11-23 14:07:24,517 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:07:24,518 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 14:07:24,518 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 14:07:24,518 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:24,519 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:24,519 INFO L791 eck$LassoCheckResult]: Stem: 162#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier; 163#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc2#1.base, main_#t~malloc2#1.offset, main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~malloc4#1.base, main_#t~malloc4#1.offset, main_#t~malloc5#1.base, main_#t~malloc5#1.offset, main_#t~mem6#1, main_#t~mem7#1, main_#t~mem8#1, main_#t~mem9#1, main_#t~mem10#1, main_#t~mem11#1, main_#t~mem12#1, main_#t~mem13#1, main_#t~mem14#1, main_#t~mem15#1, main_#t~post16#1, main_#t~mem17#1, main_#t~mem18#1, main_#t~mem19#1, main_#t~post20#1, main_#t~mem21#1, main_#t~mem22#1, main_#t~mem23#1, main_#t~post24#1, main_#t~mem25#1, main_#t~mem26#1, main_~MAX~0#1.base, main_~MAX~0#1.offset, main_~a~0#1.base, main_~a~0#1.offset, main_~b~0#1.base, main_~b~0#1.offset, main_~c~0#1.base, main_~c~0#1.offset;call main_#t~malloc2#1.base, main_#t~malloc2#1.offset := #Ultimate.allocOnStack(4);main_~MAX~0#1.base, main_~MAX~0#1.offset := main_#t~malloc2#1.base, main_#t~malloc2#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnStack(4);main_~a~0#1.base, main_~a~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;call main_#t~malloc4#1.base, main_#t~malloc4#1.offset := #Ultimate.allocOnStack(4);main_~b~0#1.base, main_~b~0#1.offset := main_#t~malloc4#1.base, main_#t~malloc4#1.offset;call main_#t~malloc5#1.base, main_#t~malloc5#1.offset := #Ultimate.allocOnStack(4);main_~c~0#1.base, main_~c~0#1.offset := main_#t~malloc5#1.base, main_#t~malloc5#1.offset;call write~int(1000, main_~MAX~0#1.base, main_~MAX~0#1.offset, 4);call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call write~int(1, main_~c~0#1.base, main_~c~0#1.offset, 4); 168#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 167#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 164#L561 assume !(main_#t~mem17#1 > main_#t~mem18#1);havoc main_#t~mem17#1;havoc main_#t~mem18#1; 165#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 160#L565 assume !(main_#t~mem21#1 > main_#t~mem22#1);havoc main_#t~mem21#1;havoc main_#t~mem22#1; 161#L565-2 [2021-11-23 14:07:24,519 INFO L793 eck$LassoCheckResult]: Loop: 161#L565-2 call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 158#L569 assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 159#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 166#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 171#L561 assume main_#t~mem17#1 > main_#t~mem18#1;havoc main_#t~mem17#1;havoc main_#t~mem18#1;call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem19#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);main_#t~post20#1 := main_#t~mem19#1;call write~int(1 + main_#t~post20#1, main_~b~0#1.base, main_~b~0#1.offset, 4);havoc main_#t~mem19#1;havoc main_#t~post20#1; 170#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 169#L565 assume main_#t~mem21#1 > main_#t~mem22#1;havoc main_#t~mem21#1;havoc main_#t~mem22#1;call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem23#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);main_#t~post24#1 := main_#t~mem23#1;call write~int(1 + main_#t~post24#1, main_~c~0#1.base, main_~c~0#1.offset, 4);havoc main_#t~mem23#1;havoc main_#t~post24#1; 161#L565-2 [2021-11-23 14:07:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1810724946, now seen corresponding path program 1 times [2021-11-23 14:07:24,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:24,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420102431] [2021-11-23 14:07:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:24,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:24,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:24,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164245695] [2021-11-23 14:07:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:24,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:24,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:24,541 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:24,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 14:07:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:24,620 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:07:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:24,650 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:07:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash -684175637, now seen corresponding path program 3 times [2021-11-23 14:07:24,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:24,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756493093] [2021-11-23 14:07:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:24,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:24,658 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:24,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769217365] [2021-11-23 14:07:24,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:07:24,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:24,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:24,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 14:07:24,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 14:07:24,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-23 14:07:24,720 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:07:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:24,749 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:07:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:24,750 INFO L85 PathProgramCache]: Analyzing trace with hash 32704890, now seen corresponding path program 1 times [2021-11-23 14:07:24,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:24,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859911254] [2021-11-23 14:07:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:24,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:24,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:24,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115383423] [2021-11-23 14:07:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:24,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:24,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:24,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 14:07:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:07:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 14:07:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:07:24,971 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-23 14:07:24,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 75 [2021-11-23 14:07:24,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 14:07:24,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 59 [2021-11-23 14:07:25,156 INFO L354 Elim1Store]: treesize reduction 76, result has 26.2 percent of original size [2021-11-23 14:07:25,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 71 [2021-11-23 14:07:25,661 INFO L354 Elim1Store]: treesize reduction 76, result has 26.2 percent of original size [2021-11-23 14:07:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 71 [2021-11-23 14:07:25,815 INFO L354 Elim1Store]: treesize reduction 290, result has 0.3 percent of original size [2021-11-23 14:07:25,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 138 treesize of output 1 [2021-11-23 14:07:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:25,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:07:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:26,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:07:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859911254] [2021-11-23 14:07:26,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 14:07:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115383423] [2021-11-23 14:07:26,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115383423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:07:26,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 14:07:26,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-23 14:07:26,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683707324] [2021-11-23 14:07:26,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 14:07:28,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:07:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 14:07:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 14:07:28,850 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. cyclomatic complexity: 4 Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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) [2021-11-23 14:07:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:07:29,123 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-23 14:07:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 14:07:29,124 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 38 transitions. [2021-11-23 14:07:29,126 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:07:29,127 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 38 transitions. [2021-11-23 14:07:29,127 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-11-23 14:07:29,128 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2021-11-23 14:07:29,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 38 transitions. [2021-11-23 14:07:29,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:07:29,128 INFO L681 BuchiCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-23 14:07:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 38 transitions. [2021-11-23 14:07:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-11-23 14:07:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 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) [2021-11-23 14:07:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 14:07:29,132 INFO L704 BuchiCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 14:07:29,133 INFO L587 BuchiCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 14:07:29,133 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-23 14:07:29,133 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 33 transitions. [2021-11-23 14:07:29,134 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:07:29,134 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 14:07:29,135 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 14:07:29,135 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:29,135 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:29,136 INFO L791 eck$LassoCheckResult]: Stem: 312#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier; 313#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc2#1.base, main_#t~malloc2#1.offset, main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~malloc4#1.base, main_#t~malloc4#1.offset, main_#t~malloc5#1.base, main_#t~malloc5#1.offset, main_#t~mem6#1, main_#t~mem7#1, main_#t~mem8#1, main_#t~mem9#1, main_#t~mem10#1, main_#t~mem11#1, main_#t~mem12#1, main_#t~mem13#1, main_#t~mem14#1, main_#t~mem15#1, main_#t~post16#1, main_#t~mem17#1, main_#t~mem18#1, main_#t~mem19#1, main_#t~post20#1, main_#t~mem21#1, main_#t~mem22#1, main_#t~mem23#1, main_#t~post24#1, main_#t~mem25#1, main_#t~mem26#1, main_~MAX~0#1.base, main_~MAX~0#1.offset, main_~a~0#1.base, main_~a~0#1.offset, main_~b~0#1.base, main_~b~0#1.offset, main_~c~0#1.base, main_~c~0#1.offset;call main_#t~malloc2#1.base, main_#t~malloc2#1.offset := #Ultimate.allocOnStack(4);main_~MAX~0#1.base, main_~MAX~0#1.offset := main_#t~malloc2#1.base, main_#t~malloc2#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnStack(4);main_~a~0#1.base, main_~a~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;call main_#t~malloc4#1.base, main_#t~malloc4#1.offset := #Ultimate.allocOnStack(4);main_~b~0#1.base, main_~b~0#1.offset := main_#t~malloc4#1.base, main_#t~malloc4#1.offset;call main_#t~malloc5#1.base, main_#t~malloc5#1.offset := #Ultimate.allocOnStack(4);main_~c~0#1.base, main_~c~0#1.offset := main_#t~malloc5#1.base, main_#t~malloc5#1.offset;call write~int(1000, main_~MAX~0#1.base, main_~MAX~0#1.offset, 4);call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call write~int(1, main_~c~0#1.base, main_~c~0#1.offset, 4); 321#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 329#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 314#L561 assume main_#t~mem17#1 > main_#t~mem18#1;havoc main_#t~mem17#1;havoc main_#t~mem18#1;call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem19#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);main_#t~post20#1 := main_#t~mem19#1;call write~int(1 + main_#t~post20#1, main_~b~0#1.base, main_~b~0#1.offset, 4);havoc main_#t~mem19#1;havoc main_#t~post20#1; 315#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 320#L565 assume !(main_#t~mem21#1 > main_#t~mem22#1);havoc main_#t~mem21#1;havoc main_#t~mem22#1; 323#L565-2 [2021-11-23 14:07:29,136 INFO L793 eck$LassoCheckResult]: Loop: 323#L565-2 call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 331#L569 assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 330#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 328#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 327#L561 assume main_#t~mem17#1 > main_#t~mem18#1;havoc main_#t~mem17#1;havoc main_#t~mem18#1;call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem19#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);main_#t~post20#1 := main_#t~mem19#1;call write~int(1 + main_#t~post20#1, main_~b~0#1.base, main_~b~0#1.offset, 4);havoc main_#t~mem19#1;havoc main_#t~post20#1; 325#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 326#L565 assume main_#t~mem21#1 > main_#t~mem22#1;havoc main_#t~mem21#1;havoc main_#t~mem22#1;call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem23#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);main_#t~post24#1 := main_#t~mem23#1;call write~int(1 + main_#t~post24#1, main_~c~0#1.base, main_~c~0#1.offset, 4);havoc main_#t~mem23#1;havoc main_#t~post24#1; 323#L565-2 [2021-11-23 14:07:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1810723024, now seen corresponding path program 1 times [2021-11-23 14:07:29,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:29,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675464793] [2021-11-23 14:07:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:29,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:29,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:29,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946509040] [2021-11-23 14:07:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:29,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:29,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:29,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:29,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 14:07:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:07:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 14:07:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:07:29,323 INFO L354 Elim1Store]: treesize reduction 119, result has 27.0 percent of original size [2021-11-23 14:07:29,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 51 [2021-11-23 14:07:29,384 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 14:07:29,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 14:07:29,526 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-23 14:07:29,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 55 [2021-11-23 14:07:29,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 14:07:29,697 INFO L354 Elim1Store]: treesize reduction 157, result has 18.7 percent of original size [2021-11-23 14:07:29,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 119 treesize of output 92 [2021-11-23 14:07:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 14:07:29,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-11-23 14:07:29,833 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 14:07:29,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 28 [2021-11-23 14:07:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:29,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:07:29,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:07:29,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675464793] [2021-11-23 14:07:29,850 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 14:07:29,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946509040] [2021-11-23 14:07:29,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946509040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:07:29,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:07:29,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:07:29,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812244011] [2021-11-23 14:07:29,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:07:29,851 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-23 14:07:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash -684175637, now seen corresponding path program 4 times [2021-11-23 14:07:29,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:29,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793539081] [2021-11-23 14:07:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:29,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:29,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:29,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383998765] [2021-11-23 14:07:29,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:07:29,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:29,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:29,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:29,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 14:07:32,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:07:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-23 14:07:32,723 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:07:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:32,768 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:07:46,591 WARN L227 SmtUtils]: Spent 12.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 14:07:47,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:07:47,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:07:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:07:47,471 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. cyclomatic complexity: 6 Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:07:47,500 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-23 14:07:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:07:47,501 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 34 transitions. [2021-11-23 14:07:47,503 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:07:47,504 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 28 states and 32 transitions. [2021-11-23 14:07:47,505 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2021-11-23 14:07:47,505 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2021-11-23 14:07:47,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 32 transitions. [2021-11-23 14:07:47,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:07:47,506 INFO L681 BuchiCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 14:07:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 32 transitions. [2021-11-23 14:07:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 14:07:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 14:07:47,510 INFO L704 BuchiCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 14:07:47,510 INFO L587 BuchiCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 14:07:47,510 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-11-23 14:07:47,510 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 32 transitions. [2021-11-23 14:07:47,512 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 14:07:47,512 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 14:07:47,512 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 14:07:47,513 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:47,513 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:47,514 INFO L791 eck$LassoCheckResult]: Stem: 399#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier; 400#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc2#1.base, main_#t~malloc2#1.offset, main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~malloc4#1.base, main_#t~malloc4#1.offset, main_#t~malloc5#1.base, main_#t~malloc5#1.offset, main_#t~mem6#1, main_#t~mem7#1, main_#t~mem8#1, main_#t~mem9#1, main_#t~mem10#1, main_#t~mem11#1, main_#t~mem12#1, main_#t~mem13#1, main_#t~mem14#1, main_#t~mem15#1, main_#t~post16#1, main_#t~mem17#1, main_#t~mem18#1, main_#t~mem19#1, main_#t~post20#1, main_#t~mem21#1, main_#t~mem22#1, main_#t~mem23#1, main_#t~post24#1, main_#t~mem25#1, main_#t~mem26#1, main_~MAX~0#1.base, main_~MAX~0#1.offset, main_~a~0#1.base, main_~a~0#1.offset, main_~b~0#1.base, main_~b~0#1.offset, main_~c~0#1.base, main_~c~0#1.offset;call main_#t~malloc2#1.base, main_#t~malloc2#1.offset := #Ultimate.allocOnStack(4);main_~MAX~0#1.base, main_~MAX~0#1.offset := main_#t~malloc2#1.base, main_#t~malloc2#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnStack(4);main_~a~0#1.base, main_~a~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;call main_#t~malloc4#1.base, main_#t~malloc4#1.offset := #Ultimate.allocOnStack(4);main_~b~0#1.base, main_~b~0#1.offset := main_#t~malloc4#1.base, main_#t~malloc4#1.offset;call main_#t~malloc5#1.base, main_#t~malloc5#1.offset := #Ultimate.allocOnStack(4);main_~c~0#1.base, main_~c~0#1.offset := main_#t~malloc5#1.base, main_#t~malloc5#1.offset;call write~int(1000, main_~MAX~0#1.base, main_~MAX~0#1.offset, 4);call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call write~int(1, main_~c~0#1.base, main_~c~0#1.offset, 4); 404#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 403#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 397#L561 assume !(main_#t~mem17#1 > main_#t~mem18#1);havoc main_#t~mem17#1;havoc main_#t~mem18#1; 398#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 395#L565 assume !(main_#t~mem21#1 > main_#t~mem22#1);havoc main_#t~mem21#1;havoc main_#t~mem22#1; 396#L565-2 call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 420#L569 assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 419#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 418#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 417#L561 assume !(main_#t~mem17#1 > main_#t~mem18#1);havoc main_#t~mem17#1;havoc main_#t~mem18#1; 416#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 405#L565 assume main_#t~mem21#1 > main_#t~mem22#1;havoc main_#t~mem21#1;havoc main_#t~mem22#1;call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem23#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);main_#t~post24#1 := main_#t~mem23#1;call write~int(1 + main_#t~post24#1, main_~c~0#1.base, main_~c~0#1.offset, 4);havoc main_#t~mem23#1;havoc main_#t~post24#1; 406#L565-2 [2021-11-23 14:07:47,514 INFO L793 eck$LassoCheckResult]: Loop: 406#L565-2 call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 414#L569 assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 413#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 412#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 409#L561 assume main_#t~mem17#1 > main_#t~mem18#1;havoc main_#t~mem17#1;havoc main_#t~mem18#1;call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem19#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);main_#t~post20#1 := main_#t~mem19#1;call write~int(1 + main_#t~post20#1, main_~b~0#1.base, main_~b~0#1.offset, 4);havoc main_#t~mem19#1;havoc main_#t~post20#1; 407#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 408#L565 assume main_#t~mem21#1 > main_#t~mem22#1;havoc main_#t~mem21#1;havoc main_#t~mem22#1;call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem23#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);main_#t~post24#1 := main_#t~mem23#1;call write~int(1 + main_#t~post24#1, main_~c~0#1.base, main_~c~0#1.offset, 4);havoc main_#t~mem23#1;havoc main_#t~post24#1; 406#L565-2 [2021-11-23 14:07:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash 32706812, now seen corresponding path program 1 times [2021-11-23 14:07:47,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:47,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331752549] [2021-11-23 14:07:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:47,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:47,527 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:47,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745429226] [2021-11-23 14:07:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:47,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:47,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:47,536 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:47,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 14:07:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:07:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 14:07:47,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:07:47,605 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 14:07:47,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 14:07:47,756 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-23 14:07:47,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 35 [2021-11-23 14:07:47,790 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 14:07:47,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-23 14:07:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:47,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:07:48,054 INFO L354 Elim1Store]: treesize reduction 30, result has 11.8 percent of original size [2021-11-23 14:07:48,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 74 [2021-11-23 14:07:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:48,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:07:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331752549] [2021-11-23 14:07:48,119 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 14:07:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745429226] [2021-11-23 14:07:48,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745429226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:07:48,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 14:07:48,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-23 14:07:48,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795440526] [2021-11-23 14:07:48,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 14:07:48,120 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-23 14:07:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash -684175637, now seen corresponding path program 5 times [2021-11-23 14:07:48,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:48,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897021127] [2021-11-23 14:07:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:48,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:48,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:48,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410338612] [2021-11-23 14:07:48,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:07:48,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:48,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:48,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:48,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 14:07:48,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 14:07:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-23 14:07:48,207 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:07:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:48,244 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:07:55,011 WARN L227 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 19 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 14:07:55,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:07:55,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 14:07:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 14:07:55,978 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. cyclomatic complexity: 5 Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 11 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) [2021-11-23 14:07:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:07:56,073 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-23 14:07:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:07:56,075 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 39 transitions. [2021-11-23 14:07:56,076 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-11-23 14:07:56,077 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 35 states and 39 transitions. [2021-11-23 14:07:56,077 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-11-23 14:07:56,077 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2021-11-23 14:07:56,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 39 transitions. [2021-11-23 14:07:56,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:07:56,078 INFO L681 BuchiCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-23 14:07:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states and 39 transitions. [2021-11-23 14:07:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-11-23 14:07:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 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) [2021-11-23 14:07:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-23 14:07:56,082 INFO L704 BuchiCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 14:07:56,083 INFO L587 BuchiCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 14:07:56,083 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-11-23 14:07:56,083 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 33 states and 37 transitions. [2021-11-23 14:07:56,084 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-11-23 14:07:56,084 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 14:07:56,084 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 14:07:56,086 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 3, 2, 2, 2, 2, 1, 1] [2021-11-23 14:07:56,086 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:56,086 INFO L791 eck$LassoCheckResult]: Stem: 554#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier; 555#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc2#1.base, main_#t~malloc2#1.offset, main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~malloc4#1.base, main_#t~malloc4#1.offset, main_#t~malloc5#1.base, main_#t~malloc5#1.offset, main_#t~mem6#1, main_#t~mem7#1, main_#t~mem8#1, main_#t~mem9#1, main_#t~mem10#1, main_#t~mem11#1, main_#t~mem12#1, main_#t~mem13#1, main_#t~mem14#1, main_#t~mem15#1, main_#t~post16#1, main_#t~mem17#1, main_#t~mem18#1, main_#t~mem19#1, main_#t~post20#1, main_#t~mem21#1, main_#t~mem22#1, main_#t~mem23#1, main_#t~post24#1, main_#t~mem25#1, main_#t~mem26#1, main_~MAX~0#1.base, main_~MAX~0#1.offset, main_~a~0#1.base, main_~a~0#1.offset, main_~b~0#1.base, main_~b~0#1.offset, main_~c~0#1.base, main_~c~0#1.offset;call main_#t~malloc2#1.base, main_#t~malloc2#1.offset := #Ultimate.allocOnStack(4);main_~MAX~0#1.base, main_~MAX~0#1.offset := main_#t~malloc2#1.base, main_#t~malloc2#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnStack(4);main_~a~0#1.base, main_~a~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;call main_#t~malloc4#1.base, main_#t~malloc4#1.offset := #Ultimate.allocOnStack(4);main_~b~0#1.base, main_~b~0#1.offset := main_#t~malloc4#1.base, main_#t~malloc4#1.offset;call main_#t~malloc5#1.base, main_#t~malloc5#1.offset := #Ultimate.allocOnStack(4);main_~c~0#1.base, main_~c~0#1.offset := main_#t~malloc5#1.base, main_#t~malloc5#1.offset;call write~int(1000, main_~MAX~0#1.base, main_~MAX~0#1.offset, 4);call write~int(1, main_~a~0#1.base, main_~a~0#1.offset, 4);call write~int(1, main_~b~0#1.base, main_~b~0#1.offset, 4);call write~int(1, main_~c~0#1.base, main_~c~0#1.offset, 4); 560#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 582#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 581#L561 assume !(main_#t~mem17#1 > main_#t~mem18#1);havoc main_#t~mem17#1;havoc main_#t~mem18#1; 580#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 579#L565 assume !(main_#t~mem21#1 > main_#t~mem22#1);havoc main_#t~mem21#1;havoc main_#t~mem22#1; 578#L565-2 call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 550#L569 assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 551#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 559#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 556#L561 assume !(main_#t~mem17#1 > main_#t~mem18#1);havoc main_#t~mem17#1;havoc main_#t~mem18#1; 557#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 552#L565 assume !(main_#t~mem21#1 > main_#t~mem22#1);havoc main_#t~mem21#1;havoc main_#t~mem22#1; 553#L565-2 call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 558#L569 assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 577#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 576#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 575#L561 assume !(main_#t~mem17#1 > main_#t~mem18#1);havoc main_#t~mem17#1;havoc main_#t~mem18#1; 566#L561-2 [2021-11-23 14:07:56,087 INFO L793 eck$LassoCheckResult]: Loop: 566#L561-2 call main_#t~mem21#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem22#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 574#L565 assume !(main_#t~mem21#1 > main_#t~mem22#1);havoc main_#t~mem21#1;havoc main_#t~mem22#1; 563#L565-2 call main_#t~mem25#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem26#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 572#L569 assume !(main_#t~mem25#1 > main_#t~mem26#1);havoc main_#t~mem25#1;havoc main_#t~mem26#1; 570#L556-2 assume !false;call main_#t~mem6#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem7#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem8#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem9#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem10#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem11#1 := read~int(main_~b~0#1.base, main_~b~0#1.offset, 4);call main_#t~mem12#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem13#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4);call main_#t~mem14#1 := read~int(main_~c~0#1.base, main_~c~0#1.offset, 4); 568#L557 assume !(main_#t~mem6#1 * main_#t~mem7#1 * main_#t~mem8#1 == main_#t~mem9#1 * main_#t~mem10#1 * main_#t~mem11#1 + main_#t~mem12#1 * main_#t~mem13#1 * main_#t~mem14#1);havoc main_#t~mem6#1;havoc main_#t~mem7#1;havoc main_#t~mem8#1;havoc main_#t~mem9#1;havoc main_#t~mem10#1;havoc main_#t~mem11#1;havoc main_#t~mem12#1;havoc main_#t~mem13#1;havoc main_#t~mem14#1;call main_#t~mem15#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);main_#t~post16#1 := main_#t~mem15#1;call write~int(1 + main_#t~post16#1, main_~a~0#1.base, main_~a~0#1.offset, 4);havoc main_#t~mem15#1;havoc main_#t~post16#1;call main_#t~mem17#1 := read~int(main_~a~0#1.base, main_~a~0#1.offset, 4);call main_#t~mem18#1 := read~int(main_~MAX~0#1.base, main_~MAX~0#1.offset, 4); 565#L561 assume !(main_#t~mem17#1 > main_#t~mem18#1);havoc main_#t~mem17#1;havoc main_#t~mem18#1; 566#L561-2 [2021-11-23 14:07:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1050456877, now seen corresponding path program 1 times [2021-11-23 14:07:56,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:56,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55734312] [2021-11-23 14:07:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:56,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:56,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:56,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817899436] [2021-11-23 14:07:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:56,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:56,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:56,128 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:56,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 14:07:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:56,235 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 14:07:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 14:07:56,300 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 14:07:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1510934149, now seen corresponding path program 1 times [2021-11-23 14:07:56,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:56,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424684569] [2021-11-23 14:07:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:56,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:56,307 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:56,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451319426] [2021-11-23 14:07:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:56,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:56,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:56,319 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:56,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1afab1d-5d5e-434f-9ccf-36278a53c422/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process