./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c16561338eb70030ddc560fe6b7af6d1b48b7a566766a02092344cb5475a4c1a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:16:35,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:16:35,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:16:35,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:16:35,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:16:35,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:16:35,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:16:35,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:16:35,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:16:35,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:16:35,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:16:35,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:16:35,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:16:35,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:16:35,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:16:35,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:16:35,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:16:35,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:16:35,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:16:35,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:16:35,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:16:35,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:16:35,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:16:35,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:16:35,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:16:35,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:16:35,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:16:35,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:16:35,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:16:35,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:16:35,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:16:35,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:16:35,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:16:35,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:16:35,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:16:35,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:16:35,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:16:35,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:16:35,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:16:35,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:16:35,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:16:35,713 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:16:35,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:16:35,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:16:35,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:16:35,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:16:35,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:16:35,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:16:35,745 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:16:35,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:16:35,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:16:35,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:16:35,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:16:35,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:16:35,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:16:35,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:16:35,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:16:35,748 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:16:35,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:16:35,748 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:16:35,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:16:35,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:16:35,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:16:35,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:16:35,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:16:35,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:16:35,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:16:35,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:16:35,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:16:35,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:16:35,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:16:35,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:16:35,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:16:35,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:16:35,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c16561338eb70030ddc560fe6b7af6d1b48b7a566766a02092344cb5475a4c1a [2021-11-02 23:16:36,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:16:36,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:16:36,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:16:36,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:16:36,202 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:16:36,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-11-02 23:16:36,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/data/61368659f/80cb386ef8d945bf997e6db551c919e7/FLAG9f854339b [2021-11-02 23:16:36,864 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:16:36,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-11-02 23:16:36,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/data/61368659f/80cb386ef8d945bf997e6db551c919e7/FLAG9f854339b [2021-11-02 23:16:37,182 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/data/61368659f/80cb386ef8d945bf997e6db551c919e7 [2021-11-02 23:16:37,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:16:37,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:16:37,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:16:37,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:16:37,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:16:37,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e87b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37, skipping insertion in model container [2021-11-02 23:16:37,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:16:37,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:16:37,476 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c[524,537] [2021-11-02 23:16:37,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:16:37,504 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:16:37,518 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c[524,537] [2021-11-02 23:16:37,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:16:37,543 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:16:37,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37 WrapperNode [2021-11-02 23:16:37,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:16:37,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:16:37,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:16:37,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:16:37,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:16:37,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:16:37,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:16:37,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:16:37,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:16:37,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:16:37,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:16:37,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:16:37,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (1/1) ... [2021-11-02 23:16:37,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:16:37,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:37,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:16:37,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:16:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:16:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:16:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:16:37,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:16:38,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:16:38,060 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-02 23:16:38,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:16:38 BoogieIcfgContainer [2021-11-02 23:16:38,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:16:38,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:16:38,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:16:38,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:16:38,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:16:37" (1/3) ... [2021-11-02 23:16:38,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72074f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:16:38, skipping insertion in model container [2021-11-02 23:16:38,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:37" (2/3) ... [2021-11-02 23:16:38,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72074f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:16:38, skipping insertion in model container [2021-11-02 23:16:38,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:16:38" (3/3) ... [2021-11-02 23:16:38,091 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound20.c [2021-11-02 23:16:38,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:16:38,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 23:16:38,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:16:38,171 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:16:38,171 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 23:16:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:16:38,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:38,194 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:38,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-11-02 23:16:38,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:38,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610572246] [2021-11-02 23:16:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:38,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:38,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:16:38,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741436826] [2021-11-02 23:16:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:38,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:38,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:38,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:38,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:16:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:38,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 23:16:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:38,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:38,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610572246] [2021-11-02 23:16:38,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:16:38,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741436826] [2021-11-02 23:16:38,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741436826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:38,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:38,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:16:38,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839774569] [2021-11-02 23:16:38,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:16:38,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:38,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:16:38,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:16:38,591 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:38,611 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-11-02 23:16:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:16:38,614 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:16:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:38,625 INFO L225 Difference]: With dead ends: 39 [2021-11-02 23:16:38,626 INFO L226 Difference]: Without dead ends: 17 [2021-11-02 23:16:38,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:16:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-02 23:16:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-02 23:16:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-02 23:16:38,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-11-02 23:16:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:38,666 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-02 23:16:38,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-02 23:16:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:16:38,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:38,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:38,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:38,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-02 23:16:38,893 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-11-02 23:16:38,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:38,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112788958] [2021-11-02 23:16:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:38,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:38,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:16:38,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945097763] [2021-11-02 23:16:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:38,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:38,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:38,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:38,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:16:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:16:39,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:39,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:39,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112788958] [2021-11-02 23:16:39,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:16:39,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945097763] [2021-11-02 23:16:39,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945097763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:39,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:39,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:16:39,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559951518] [2021-11-02 23:16:39,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:16:39,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:16:39,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:16:39,234 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:48,684 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-11-02 23:16:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:16:48,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:16:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:48,696 INFO L225 Difference]: With dead ends: 31 [2021-11-02 23:16:48,696 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 23:16:48,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:16:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 23:16:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-11-02 23:16:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-02 23:16:48,703 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2021-11-02 23:16:48,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:48,704 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-02 23:16:48,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-02 23:16:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:16:48,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:48,707 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:48,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:48,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:48,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-11-02 23:16:48,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:48,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327963254] [2021-11-02 23:16:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:48,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:48,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:16:48,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170504902] [2021-11-02 23:16:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:48,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:48,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:48,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:48,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:16:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:49,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:16:49,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:49,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:49,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327963254] [2021-11-02 23:16:49,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:16:49,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170504902] [2021-11-02 23:16:49,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170504902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:49,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:49,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:49,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23241125] [2021-11-02 23:16:49,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:16:49,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:16:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:16:49,104 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:49,130 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-02 23:16:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:16:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 23:16:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:49,134 INFO L225 Difference]: With dead ends: 24 [2021-11-02 23:16:49,134 INFO L226 Difference]: Without dead ends: 20 [2021-11-02 23:16:49,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:16:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-02 23:16:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-02 23:16:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-02 23:16:49,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-11-02 23:16:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:49,148 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-02 23:16:49,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-02 23:16:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:16:49,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:49,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:49,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:49,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-02 23:16:49,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:49,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-11-02 23:16:49,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:49,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846228446] [2021-11-02 23:16:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:49,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:49,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:16:49,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45893913] [2021-11-02 23:16:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:49,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:49,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:49,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:49,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:16:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:49,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:16:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:49,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:49,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846228446] [2021-11-02 23:16:49,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:16:49,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45893913] [2021-11-02 23:16:49,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45893913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:49,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:49,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:16:49,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264258453] [2021-11-02 23:16:49,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:16:49,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:16:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:16:49,626 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:06,964 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-11-02 23:17:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:17:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 23:17:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:06,965 INFO L225 Difference]: With dead ends: 24 [2021-11-02 23:17:06,966 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 23:17:06,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:17:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 23:17:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-02 23:17:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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) [2021-11-02 23:17:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-02 23:17:06,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-11-02 23:17:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:06,972 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-02 23:17:06,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-02 23:17:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:17:06,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:06,974 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:07,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:07,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:07,192 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:07,193 INFO L85 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2021-11-02 23:17:07,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:07,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130762316] [2021-11-02 23:17:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:07,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:07,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:17:07,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057588575] [2021-11-02 23:17:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:07,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:07,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:07,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:07,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:17:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:17:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:07,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:07,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130762316] [2021-11-02 23:17:07,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:17:07,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057588575] [2021-11-02 23:17:07,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057588575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:07,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:17:07,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-02 23:17:07,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098202478] [2021-11-02 23:17:07,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:17:07,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:07,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:17:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:17:07,362 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:07,387 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-02 23:17:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:17:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 23:17:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:07,389 INFO L225 Difference]: With dead ends: 26 [2021-11-02 23:17:07,389 INFO L226 Difference]: Without dead ends: 22 [2021-11-02 23:17:07,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:17:07,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-02 23:17:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-02 23:17:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-02 23:17:07,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-11-02 23:17:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:07,396 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-02 23:17:07,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-02 23:17:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:17:07,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:07,398 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:07,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:07,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:07,637 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2021-11-02 23:17:07,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:07,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154939034] [2021-11-02 23:17:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:07,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:07,649 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:17:07,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380958656] [2021-11-02 23:17:07,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:07,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:07,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:07,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:17:07,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:07,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:07,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:17:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:07,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:07,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154939034] [2021-11-02 23:17:07,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:17:07,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380958656] [2021-11-02 23:17:07,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380958656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:07,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:17:07,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 23:17:07,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544321796] [2021-11-02 23:17:07,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:17:07,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:17:07,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:17:07,884 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:07,932 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-11-02 23:17:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:17:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 23:17:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:07,934 INFO L225 Difference]: With dead ends: 31 [2021-11-02 23:17:07,935 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 23:17:07,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:17:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 23:17:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-02 23:17:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2021-11-02 23:17:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-02 23:17:07,941 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2021-11-02 23:17:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:07,942 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-02 23:17:07,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-02 23:17:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:17:07,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:07,944 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:07,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:08,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 23:17:08,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:08,173 INFO L85 PathProgramCache]: Analyzing trace with hash 256826265, now seen corresponding path program 3 times [2021-11-02 23:17:08,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:08,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911184302] [2021-11-02 23:17:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:08,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:08,186 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:17:08,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841267096] [2021-11-02 23:17:08,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:17:08,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:08,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:08,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:08,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:17:09,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:17:09,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:17:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:09,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:09,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911184302] [2021-11-02 23:17:09,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:17:09,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841267096] [2021-11-02 23:17:09,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841267096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:09,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:17:09,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:17:09,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339595995] [2021-11-02 23:17:09,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:17:09,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:09,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:17:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:17:09,661 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-11-02 23:17:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:09,712 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-11-02 23:17:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:17:09,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:17:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:09,715 INFO L225 Difference]: With dead ends: 36 [2021-11-02 23:17:09,715 INFO L226 Difference]: Without dead ends: 32 [2021-11-02 23:17:09,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:17:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-02 23:17:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-02 23:17:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-02 23:17:09,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2021-11-02 23:17:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:09,723 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-02 23:17:09,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-11-02 23:17:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-02 23:17:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:17:09,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:09,725 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:09,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:09,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:09,933 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 4 times [2021-11-02 23:17:09,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:09,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783625346] [2021-11-02 23:17:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:09,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:09,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:17:09,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438231900] [2021-11-02 23:17:09,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:09,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:09,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:09,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:09,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:17:10,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:10,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:10,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:17:10,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:10,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:10,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783625346] [2021-11-02 23:17:10,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:17:10,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438231900] [2021-11-02 23:17:10,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438231900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:10,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:17:10,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:17:10,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968542588] [2021-11-02 23:17:10,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:17:10,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:17:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:17:10,243 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:10,328 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-02 23:17:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:17:10,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-02 23:17:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:10,335 INFO L225 Difference]: With dead ends: 41 [2021-11-02 23:17:10,335 INFO L226 Difference]: Without dead ends: 37 [2021-11-02 23:17:10,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:17:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-02 23:17:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-02 23:17:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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) [2021-11-02 23:17:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-02 23:17:10,351 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2021-11-02 23:17:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:10,352 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-02 23:17:10,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-02 23:17:10,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:17:10,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:10,354 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:10,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:10,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:10,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:10,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:10,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 5 times [2021-11-02 23:17:10,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:10,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84568379] [2021-11-02 23:17:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:10,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:10,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:17:10,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342676189] [2021-11-02 23:17:10,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:10,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:10,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:10,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:10,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:17:10,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:17:10,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:10,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:17:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:10,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:10,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84568379] [2021-11-02 23:17:10,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:17:10,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342676189] [2021-11-02 23:17:10,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342676189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:10,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:17:10,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:17:10,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889459306] [2021-11-02 23:17:10,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:17:10,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:17:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:17:10,914 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:11,012 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-11-02 23:17:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:17:11,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 23:17:11,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:11,013 INFO L225 Difference]: With dead ends: 46 [2021-11-02 23:17:11,014 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 23:17:11,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:17:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 23:17:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-02 23:17:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-02 23:17:11,022 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2021-11-02 23:17:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:11,022 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-02 23:17:11,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-02 23:17:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:17:11,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:11,025 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:11,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:11,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:11,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:11,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 6 times [2021-11-02 23:17:11,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:11,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097866573] [2021-11-02 23:17:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:11,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:11,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:17:11,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063032845] [2021-11-02 23:17:11,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:11,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:11,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:11,277 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:11,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:20:22,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:20:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:20:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:22,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:22,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097866573] [2021-11-02 23:20:22,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:22,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063032845] [2021-11-02 23:20:22,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063032845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:22,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:22,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:20:22,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753897415] [2021-11-02 23:20:22,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:20:22,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:20:22,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:20:22,840 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:22,921 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-11-02 23:20:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:20:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:20:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:22,923 INFO L225 Difference]: With dead ends: 51 [2021-11-02 23:20:22,924 INFO L226 Difference]: Without dead ends: 47 [2021-11-02 23:20:22,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:20:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-02 23:20:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-02 23:20:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 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) [2021-11-02 23:20:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-02 23:20:22,945 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2021-11-02 23:20:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:22,945 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-02 23:20:22,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-02 23:20:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:20:22,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:22,956 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:22,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:23,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:20:23,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2055970279, now seen corresponding path program 7 times [2021-11-02 23:20:23,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:23,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367352452] [2021-11-02 23:20:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:23,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:23,166 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:23,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015341373] [2021-11-02 23:20:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:23,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:23,174 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:23,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:20:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:23,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:23,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367352452] [2021-11-02 23:20:23,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:23,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015341373] [2021-11-02 23:20:23,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015341373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:23,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:23,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:20:23,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699575101] [2021-11-02 23:20:23,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:20:23,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:20:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:20:23,533 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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) [2021-11-02 23:20:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:23,621 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-11-02 23:20:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:20:23,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 23:20:23,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:23,625 INFO L225 Difference]: With dead ends: 56 [2021-11-02 23:20:23,625 INFO L226 Difference]: Without dead ends: 52 [2021-11-02 23:20:23,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:20:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-02 23:20:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-02 23:20:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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) [2021-11-02 23:20:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-02 23:20:23,639 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2021-11-02 23:20:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:23,639 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-02 23:20:23,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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) [2021-11-02 23:20:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-02 23:20:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:20:23,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:23,640 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:23,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:23,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:20:23,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1472242773, now seen corresponding path program 8 times [2021-11-02 23:20:23,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:23,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004394423] [2021-11-02 23:20:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:23,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:23,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:23,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881607603] [2021-11-02 23:20:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:20:23,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:23,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:23,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:23,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:20:24,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:24,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:20:24,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:24,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:24,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004394423] [2021-11-02 23:20:24,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:24,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881607603] [2021-11-02 23:20:24,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881607603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:24,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:24,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:20:24,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932998224] [2021-11-02 23:20:24,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:20:24,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:20:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:20:24,369 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:24,477 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-11-02 23:20:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:20:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 23:20:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:24,478 INFO L225 Difference]: With dead ends: 61 [2021-11-02 23:20:24,479 INFO L226 Difference]: Without dead ends: 57 [2021-11-02 23:20:24,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:20:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-02 23:20:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-02 23:20:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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) [2021-11-02 23:20:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-11-02 23:20:24,487 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2021-11-02 23:20:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:24,487 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-11-02 23:20:24,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-11-02 23:20:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:20:24,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:24,489 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:24,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-02 23:20:24,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 23:20:24,693 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1819570855, now seen corresponding path program 9 times [2021-11-02 23:20:24,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:24,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417814823] [2021-11-02 23:20:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:24,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:24,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:24,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309477477] [2021-11-02 23:20:24,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:24,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:24,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:24,705 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:24,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:20:27,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:20:27,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:20:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:27,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:27,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417814823] [2021-11-02 23:20:27,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:27,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309477477] [2021-11-02 23:20:27,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309477477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:27,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:27,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 23:20:27,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135846839] [2021-11-02 23:20:27,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:20:27,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:20:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:20:27,321 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 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) [2021-11-02 23:20:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:27,426 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-11-02 23:20:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:20:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 23:20:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:27,427 INFO L225 Difference]: With dead ends: 66 [2021-11-02 23:20:27,427 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 23:20:27,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:20:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 23:20:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-02 23:20:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 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) [2021-11-02 23:20:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-02 23:20:27,439 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2021-11-02 23:20:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:27,440 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-02 23:20:27,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 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) [2021-11-02 23:20:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-02 23:20:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 23:20:27,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:27,442 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:27,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:27,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:20:27,649 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 10 times [2021-11-02 23:20:27,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:27,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056909723] [2021-11-02 23:20:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:27,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:27,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:27,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296176888] [2021-11-02 23:20:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:20:27,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:27,678 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:27,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:20:27,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:20:27,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:27,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:20:27,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:28,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:28,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056909723] [2021-11-02 23:20:28,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:28,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296176888] [2021-11-02 23:20:28,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296176888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:28,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:28,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 23:20:28,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053099279] [2021-11-02 23:20:28,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:20:28,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:28,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:20:28,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:20:28,208 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:28,343 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-11-02 23:20:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:20:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 23:20:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:28,345 INFO L225 Difference]: With dead ends: 71 [2021-11-02 23:20:28,345 INFO L226 Difference]: Without dead ends: 67 [2021-11-02 23:20:28,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:20:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-02 23:20:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-02 23:20:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-11-02 23:20:28,367 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2021-11-02 23:20:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:28,369 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-11-02 23:20:28,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-11-02 23:20:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:20:28,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:28,370 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:28,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:28,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:28,584 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash -736778087, now seen corresponding path program 11 times [2021-11-02 23:20:28,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:28,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954161832] [2021-11-02 23:20:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:28,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:28,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:28,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863276749] [2021-11-02 23:20:28,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:20:28,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:28,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:28,605 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:28,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:20:28,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:20:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:20:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:29,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:29,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954161832] [2021-11-02 23:20:29,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:29,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863276749] [2021-11-02 23:20:29,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863276749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:29,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:29,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 23:20:29,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344029775] [2021-11-02 23:20:29,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:20:29,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:20:29,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:20:29,258 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 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) [2021-11-02 23:20:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:29,425 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-11-02 23:20:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:20:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:20:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:29,427 INFO L225 Difference]: With dead ends: 76 [2021-11-02 23:20:29,427 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 23:20:29,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:20:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 23:20:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-02 23:20:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 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) [2021-11-02 23:20:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-11-02 23:20:29,442 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2021-11-02 23:20:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:29,442 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-11-02 23:20:29,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 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) [2021-11-02 23:20:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-11-02 23:20:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:20:29,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:29,443 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:29,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-02 23:20:29,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:20:29,659 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:29,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1545198293, now seen corresponding path program 12 times [2021-11-02 23:20:29,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:29,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942539287] [2021-11-02 23:20:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:29,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:29,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:29,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306279777] [2021-11-02 23:20:29,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:20:29,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:29,676 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:29,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:20:32,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:20:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:20:32,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:33,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:33,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942539287] [2021-11-02 23:20:33,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:33,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306279777] [2021-11-02 23:20:33,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306279777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:33,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:33,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 23:20:33,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260401366] [2021-11-02 23:20:33,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:20:33,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:33,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:20:33,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:20:33,077 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:33,273 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-11-02 23:20:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:20:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 23:20:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:33,274 INFO L225 Difference]: With dead ends: 81 [2021-11-02 23:20:33,274 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:20:33,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:20:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:20:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-02 23:20:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 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) [2021-11-02 23:20:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-11-02 23:20:33,282 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2021-11-02 23:20:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:33,282 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-11-02 23:20:33,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-11-02 23:20:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 23:20:33,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:33,283 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:33,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:33,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:33,496 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash -936987687, now seen corresponding path program 13 times [2021-11-02 23:20:33,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:33,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657054856] [2021-11-02 23:20:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:33,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:33,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:33,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102953539] [2021-11-02 23:20:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:33,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:33,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:33,509 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:33,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:20:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:33,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:20:33,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:34,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:34,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657054856] [2021-11-02 23:20:34,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:34,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102953539] [2021-11-02 23:20:34,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102953539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:34,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:34,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 23:20:34,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57765996] [2021-11-02 23:20:34,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:20:34,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:20:34,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:20:34,147 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 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) [2021-11-02 23:20:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:34,351 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-11-02 23:20:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:20:34,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 23:20:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:34,352 INFO L225 Difference]: With dead ends: 86 [2021-11-02 23:20:34,352 INFO L226 Difference]: Without dead ends: 82 [2021-11-02 23:20:34,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:20:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-02 23:20:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-02 23:20:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 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) [2021-11-02 23:20:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-11-02 23:20:34,360 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2021-11-02 23:20:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:34,361 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-11-02 23:20:34,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 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) [2021-11-02 23:20:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-11-02 23:20:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 23:20:34,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:34,362 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:34,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-02 23:20:34,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:20:34,588 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -990240277, now seen corresponding path program 14 times [2021-11-02 23:20:34,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:34,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201999863] [2021-11-02 23:20:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:34,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:34,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:34,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556197210] [2021-11-02 23:20:34,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:20:34,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:34,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:34,615 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:34,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:20:34,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:34,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:20:34,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:35,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:35,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201999863] [2021-11-02 23:20:35,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:35,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556197210] [2021-11-02 23:20:35,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556197210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:35,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:35,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 23:20:35,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245294442] [2021-11-02 23:20:35,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:20:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:20:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:20:35,286 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:35,500 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2021-11-02 23:20:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:20:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-02 23:20:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:35,502 INFO L225 Difference]: With dead ends: 91 [2021-11-02 23:20:35,502 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 23:20:35,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:20:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 23:20:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-02 23:20:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 states have internal predecessors, (102), 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) [2021-11-02 23:20:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-11-02 23:20:35,510 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2021-11-02 23:20:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:35,510 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-11-02 23:20:35,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:35,510 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-11-02 23:20:35,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 23:20:35,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:35,511 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:35,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:35,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:20:35,712 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:35,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1479364839, now seen corresponding path program 15 times [2021-11-02 23:20:35,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:35,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147311749] [2021-11-02 23:20:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:35,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:35,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:35,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286973124] [2021-11-02 23:20:35,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:35,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:35,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:35,739 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:35,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:20:36,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:20:36,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:20:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:36,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:36,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147311749] [2021-11-02 23:20:36,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:36,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286973124] [2021-11-02 23:20:36,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286973124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:36,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:36,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 23:20:36,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16274186] [2021-11-02 23:20:36,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:20:36,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:36,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:20:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:20:36,891 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 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) [2021-11-02 23:20:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:37,115 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2021-11-02 23:20:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:20:37,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-02 23:20:37,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:37,116 INFO L225 Difference]: With dead ends: 96 [2021-11-02 23:20:37,116 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 23:20:37,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:20:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 23:20:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-02 23:20:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 91 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2021-11-02 23:20:37,124 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2021-11-02 23:20:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:37,125 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2021-11-02 23:20:37,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 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) [2021-11-02 23:20:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2021-11-02 23:20:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 23:20:37,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:37,126 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:37,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:37,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:37,337 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1245106517, now seen corresponding path program 16 times [2021-11-02 23:20:37,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:37,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793241774] [2021-11-02 23:20:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:37,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:37,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:37,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349872681] [2021-11-02 23:20:37,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:20:37,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:37,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:37,353 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:37,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae54f11-9b0e-450a-a39b-9cae1680ae5d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process