./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.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_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/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_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/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_d0c8659d-835a-4a9e-b78d-113337dd1d16/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 f57f8b833105028fdf95b78a3cf338388755f00064f1be1e7a158d1da7dbd5a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:10:04,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:10:04,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:10:04,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:10:04,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:10:04,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:10:04,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:10:04,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:10:04,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:10:04,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:10:04,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:10:04,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:10:04,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:10:04,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:10:04,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:10:04,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:10:04,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:10:04,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:10:04,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:10:04,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:10:04,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:10:04,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:10:04,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:10:04,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:10:04,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:10:04,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:10:04,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:10:04,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:10:04,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:10:04,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:10:04,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:10:04,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:10:04,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:10:04,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:10:04,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:10:04,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:10:04,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:10:04,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:10:04,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:10:04,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:10:04,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:10:04,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:10:04,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:10:04,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:10:04,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:10:04,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:10:04,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:10:04,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:10:04,640 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:10:04,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:10:04,640 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:10:04,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:10:04,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:10:04,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:10:04,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:10:04,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:10:04,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:10:04,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:10:04,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:10:04,643 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:10:04,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:10:04,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:10:04,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:10:04,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:10:04,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:10:04,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:10:04,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:10:04,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:10:04,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:10:04,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:10:04,645 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:10:04,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:10:04,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:10:04,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:10:04,646 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_d0c8659d-835a-4a9e-b78d-113337dd1d16/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57f8b833105028fdf95b78a3cf338388755f00064f1be1e7a158d1da7dbd5a2 [2021-11-02 23:10:04,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:10:04,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:10:04,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:10:04,951 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:10:04,952 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:10:04,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2021-11-02 23:10:05,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/data/ecdf01228/d2bf7bb46d06450cb8b47b2200c81166/FLAG6160160dd [2021-11-02 23:10:05,768 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:10:05,771 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2021-11-02 23:10:05,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/data/ecdf01228/d2bf7bb46d06450cb8b47b2200c81166/FLAG6160160dd [2021-11-02 23:10:06,086 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/data/ecdf01228/d2bf7bb46d06450cb8b47b2200c81166 [2021-11-02 23:10:06,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:10:06,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:10:06,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:10:06,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:10:06,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:10:06,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12824875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06, skipping insertion in model container [2021-11-02 23:10:06,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:10:06,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:10:06,418 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_d0c8659d-835a-4a9e-b78d-113337dd1d16/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2021-11-02 23:10:06,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:10:06,435 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:10:06,466 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_d0c8659d-835a-4a9e-b78d-113337dd1d16/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2021-11-02 23:10:06,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:10:06,485 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:10:06,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06 WrapperNode [2021-11-02 23:10:06,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:10:06,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:10:06,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:10:06,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:10:06,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:10:06,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:10:06,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:10:06,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:10:06,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:10:06,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:10:06,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:10:06,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:10:06,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (1/1) ... [2021-11-02 23:10:06,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:10:06,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:06,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:10:06,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:10:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:10:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:10:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:10:06,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:10:06,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:10:06,958 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 23:10:06,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:10:06 BoogieIcfgContainer [2021-11-02 23:10:06,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:10:06,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:10:06,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:10:06,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:10:06,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:10:06" (1/3) ... [2021-11-02 23:10:06,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4288a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:10:06, skipping insertion in model container [2021-11-02 23:10:06,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:10:06" (2/3) ... [2021-11-02 23:10:06,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4288a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:10:06, skipping insertion in model container [2021-11-02 23:10:06,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:10:06" (3/3) ... [2021-11-02 23:10:06,973 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2021-11-02 23:10:06,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:10:06,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:10:07,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:10:07,062 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 23:10:07,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:10:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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 23:10:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 23:10:07,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:07,086 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:07,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash 739680105, now seen corresponding path program 1 times [2021-11-02 23:10:07,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:07,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557318372] [2021-11-02 23:10:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:07,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:07,369 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 23:10:07,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:07,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557318372] [2021-11-02 23:10:07,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557318372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:10:07,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:10:07,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:10:07,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698000582] [2021-11-02 23:10:07,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:10:07,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:10:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:10:07,400 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 23:10:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:07,450 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-02 23:10:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:10:07,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-02 23:10:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:07,469 INFO L225 Difference]: With dead ends: 35 [2021-11-02 23:10:07,469 INFO L226 Difference]: Without dead ends: 19 [2021-11-02 23:10:07,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:10:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-02 23:10:07,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-11-02 23:10:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 23:10:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-02 23:10:07,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2021-11-02 23:10:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:07,516 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-02 23:10:07,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 23:10:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-02 23:10:07,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:10:07,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:07,518 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:07,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:10:07,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:07,520 INFO L85 PathProgramCache]: Analyzing trace with hash 573752309, now seen corresponding path program 1 times [2021-11-02 23:10:07,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:07,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174497879] [2021-11-02 23:10:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:07,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:07,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:07,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174497879] [2021-11-02 23:10:07,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174497879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:10:07,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:10:07,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:10:07,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979791528] [2021-11-02 23:10:07,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:10:07,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:10:07,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:10:07,603 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:07,617 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-11-02 23:10:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:10:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 23:10:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:07,619 INFO L225 Difference]: With dead ends: 28 [2021-11-02 23:10:07,619 INFO L226 Difference]: Without dead ends: 14 [2021-11-02 23:10:07,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:10:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-02 23:10:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-02 23:10:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 23:10:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-02 23:10:07,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-11-02 23:10:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:07,625 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-02 23:10:07,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-02 23:10:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:10:07,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:07,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:07,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:10:07,627 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1667531312, now seen corresponding path program 1 times [2021-11-02 23:10:07,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:07,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844261825] [2021-11-02 23:10:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:07,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:07,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:07,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844261825] [2021-11-02 23:10:07,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844261825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:07,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016877502] [2021-11-02 23:10:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:07,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:07,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:07,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:07,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:10:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:10:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:08,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016877502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:08,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:08,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:10:08,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266851269] [2021-11-02 23:10:08,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:10:08,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:08,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:10:08,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:10:08,029 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:08,055 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-02 23:10:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:10:08,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 23:10:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:08,056 INFO L225 Difference]: With dead ends: 28 [2021-11-02 23:10:08,057 INFO L226 Difference]: Without dead ends: 21 [2021-11-02 23:10:08,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:10:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-02 23:10:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-11-02 23:10:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 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 23:10:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-02 23:10:08,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-11-02 23:10:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:08,063 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-02 23:10:08,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-02 23:10:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:10:08,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:08,065 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:08,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:08,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:08,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:08,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1478121097, now seen corresponding path program 2 times [2021-11-02 23:10:08,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:08,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968652470] [2021-11-02 23:10:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:08,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:10:08,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:08,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968652470] [2021-11-02 23:10:08,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968652470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:08,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20700416] [2021-11-02 23:10:08,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:08,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:08,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:08,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:08,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:10:08,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 23:10:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:10:08,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:10:08,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20700416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:10:08,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:10:08,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-02 23:10:08,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157273369] [2021-11-02 23:10:08,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:10:08,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:10:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:10:08,669 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:08,690 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-02 23:10:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:10:08,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 23:10:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:08,692 INFO L225 Difference]: With dead ends: 22 [2021-11-02 23:10:08,692 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 23:10:08,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:10:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 23:10:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-02 23:10:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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 23:10:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-02 23:10:08,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-11-02 23:10:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:08,699 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-02 23:10:08,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-02 23:10:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:10:08,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:08,700 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:08,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:08,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:08,923 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1461110436, now seen corresponding path program 1 times [2021-11-02 23:10:08,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:08,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762898430] [2021-11-02 23:10:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:08,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:09,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:09,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762898430] [2021-11-02 23:10:09,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762898430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:09,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176483032] [2021-11-02 23:10:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:09,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:09,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:09,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:09,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:10:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:10:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:09,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176483032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:09,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:09,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 23:10:09,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39978528] [2021-11-02 23:10:09,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:10:09,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:10:09,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:10:09,183 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 23:10:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:09,212 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-02 23:10:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:10:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 16 [2021-11-02 23:10:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:09,215 INFO L225 Difference]: With dead ends: 32 [2021-11-02 23:10:09,215 INFO L226 Difference]: Without dead ends: 25 [2021-11-02 23:10:09,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:10:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-02 23:10:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-02 23:10:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-02 23:10:09,226 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2021-11-02 23:10:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:09,228 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-02 23:10:09,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 23:10:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-02 23:10:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:10:09,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:09,233 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:09,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:09,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:09,459 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash -295213789, now seen corresponding path program 2 times [2021-11-02 23:10:09,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:09,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652737332] [2021-11-02 23:10:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:09,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:09,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:09,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652737332] [2021-11-02 23:10:09,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652737332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:09,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075859075] [2021-11-02 23:10:09,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:09,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:09,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:09,599 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:09,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:10:09,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:10:09,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075859075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:09,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:09,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 23:10:09,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043582223] [2021-11-02 23:10:09,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:10:09,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:10:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:10:09,842 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:09,884 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-02 23:10:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:10:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:10:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:09,888 INFO L225 Difference]: With dead ends: 36 [2021-11-02 23:10:09,888 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 23:10:09,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:10:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 23:10:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-02 23:10:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-02 23:10:09,903 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2021-11-02 23:10:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:09,903 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-02 23:10:09,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-02 23:10:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:10:09,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:09,906 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:09,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:10,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:10,123 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:10,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1379117718, now seen corresponding path program 3 times [2021-11-02 23:10:10,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:10,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222429777] [2021-11-02 23:10:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:10,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:10,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:10,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222429777] [2021-11-02 23:10:10,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222429777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:10,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381309598] [2021-11-02 23:10:10,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:10,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:10,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:10,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:10:10,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:10:10,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:10,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:10:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:10,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381309598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:10,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:10,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 23:10:10,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495173479] [2021-11-02 23:10:10,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:10:10,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:10:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:10:10,552 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:10,581 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-11-02 23:10:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:10:10,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:10:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:10,589 INFO L225 Difference]: With dead ends: 40 [2021-11-02 23:10:10,589 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 23:10:10,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:10:10,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 23:10:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-11-02 23:10:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-02 23:10:10,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2021-11-02 23:10:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:10,606 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-02 23:10:10,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:10,607 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-02 23:10:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:10:10,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:10,610 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:10,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:10,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:10,829 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:10,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1428277809, now seen corresponding path program 4 times [2021-11-02 23:10:10,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:10,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818290031] [2021-11-02 23:10:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:10,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:10,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:10,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818290031] [2021-11-02 23:10:10,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818290031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:10,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325085688] [2021-11-02 23:10:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:10,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:10,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:10,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:10,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:10:11,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:11,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:11,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:10:11,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:11,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325085688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:11,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:11,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:10:11,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993935302] [2021-11-02 23:10:11,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:10:11,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:10:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:10:11,215 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:11,261 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-11-02 23:10:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:10:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:10:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:11,266 INFO L225 Difference]: With dead ends: 44 [2021-11-02 23:10:11,266 INFO L226 Difference]: Without dead ends: 37 [2021-11-02 23:10:11,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:10:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-02 23:10:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-11-02 23:10:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-02 23:10:11,276 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2021-11-02 23:10:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:11,277 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-02 23:10:11,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-02 23:10:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:10:11,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:11,279 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:11,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:11,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:11,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1215200392, now seen corresponding path program 5 times [2021-11-02 23:10:11,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:11,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249249052] [2021-11-02 23:10:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:11,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:11,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:11,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249249052] [2021-11-02 23:10:11,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249249052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:11,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031719653] [2021-11-02 23:10:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:11,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:11,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:11,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:11,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:10:11,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:10:11,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:11,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:10:11,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:11,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031719653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:11,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:11,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:10:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266586554] [2021-11-02 23:10:11,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:10:11,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:10:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:10:11,926 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:11,967 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-11-02 23:10:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:10:11,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:10:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:11,970 INFO L225 Difference]: With dead ends: 48 [2021-11-02 23:10:11,970 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 23:10:11,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:10:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 23:10:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-02 23:10:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-11-02 23:10:11,984 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2021-11-02 23:10:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:11,984 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-11-02 23:10:11,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-11-02 23:10:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:10:11,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:11,990 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:12,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:12,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:12,207 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2103787839, now seen corresponding path program 6 times [2021-11-02 23:10:12,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:12,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721335086] [2021-11-02 23:10:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:12,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:12,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:12,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721335086] [2021-11-02 23:10:12,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721335086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:12,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541583693] [2021-11-02 23:10:12,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:10:12,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:12,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:12,328 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:12,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:10:12,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:10:12,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:12,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:10:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:12,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541583693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:12,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:12,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:10:12,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312998992] [2021-11-02 23:10:12,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:10:12,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:10:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:10:12,664 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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 23:10:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:12,701 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-02 23:10:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:10:12,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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 36 [2021-11-02 23:10:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:12,703 INFO L225 Difference]: With dead ends: 52 [2021-11-02 23:10:12,703 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 23:10:12,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:10:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 23:10:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-11-02 23:10:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-02 23:10:12,709 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2021-11-02 23:10:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:12,710 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-02 23:10:12,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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 23:10:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-02 23:10:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:10:12,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:12,712 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:12,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:12,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:10:12,922 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1811496058, now seen corresponding path program 7 times [2021-11-02 23:10:12,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:12,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192963347] [2021-11-02 23:10:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:12,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:13,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:13,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192963347] [2021-11-02 23:10:13,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192963347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:13,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280790326] [2021-11-02 23:10:13,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:13,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:13,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:13,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:13,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:10:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:10:13,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:13,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280790326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:13,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:13,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:10:13,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268419188] [2021-11-02 23:10:13,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:10:13,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:13,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:10:13,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:10:13,414 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:13,466 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-11-02 23:10:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:10:13,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 23:10:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:13,468 INFO L225 Difference]: With dead ends: 56 [2021-11-02 23:10:13,468 INFO L226 Difference]: Without dead ends: 49 [2021-11-02 23:10:13,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:10:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-02 23:10:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-11-02 23:10:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-02 23:10:13,474 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2021-11-02 23:10:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:13,477 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-02 23:10:13,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:13,478 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-02 23:10:13,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:10:13,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:13,480 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:13,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:13,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:13,691 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:13,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1644180915, now seen corresponding path program 8 times [2021-11-02 23:10:13,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:13,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318388497] [2021-11-02 23:10:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:13,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:13,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:13,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318388497] [2021-11-02 23:10:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318388497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:13,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749340849] [2021-11-02 23:10:13,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:13,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:13,847 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:13,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:10:14,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:14,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:10:14,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:14,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749340849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:14,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:14,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:10:14,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348108422] [2021-11-02 23:10:14,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:10:14,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:10:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:10:14,283 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:14,335 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-02 23:10:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:10:14,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:10:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:14,337 INFO L225 Difference]: With dead ends: 60 [2021-11-02 23:10:14,337 INFO L226 Difference]: Without dead ends: 53 [2021-11-02 23:10:14,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:10:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-02 23:10:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-11-02 23:10:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-11-02 23:10:14,343 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2021-11-02 23:10:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:14,344 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-11-02 23:10:14,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-11-02 23:10:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 23:10:14,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:14,345 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:14,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:14,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 23:10:14,560 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1660556692, now seen corresponding path program 9 times [2021-11-02 23:10:14,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:14,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614944361] [2021-11-02 23:10:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:14,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:14,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:14,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614944361] [2021-11-02 23:10:14,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614944361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:14,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132352331] [2021-11-02 23:10:14,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:14,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:14,726 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:14,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:10:14,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 23:10:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:14,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:10:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:15,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132352331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:15,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:15,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:10:15,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12158057] [2021-11-02 23:10:15,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:10:15,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:15,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:10:15,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:10:15,189 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:15,239 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-11-02 23:10:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:10:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-02 23:10:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:15,241 INFO L225 Difference]: With dead ends: 64 [2021-11-02 23:10:15,241 INFO L226 Difference]: Without dead ends: 57 [2021-11-02 23:10:15,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:10:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-02 23:10:15,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-11-02 23:10:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-02 23:10:15,247 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2021-11-02 23:10:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:15,248 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-02 23:10:15,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-02 23:10:15,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:10:15,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:15,249 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:15,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:15,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:10:15,475 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1069507931, now seen corresponding path program 10 times [2021-11-02 23:10:15,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:15,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999128784] [2021-11-02 23:10:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:15,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:15,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:15,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999128784] [2021-11-02 23:10:15,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999128784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:15,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478025772] [2021-11-02 23:10:15,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:15,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:15,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:15,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:15,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:10:15,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:15,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:15,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:10:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:16,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478025772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:16,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:16,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:10:16,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372929517] [2021-11-02 23:10:16,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:10:16,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:10:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:10:16,104 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:16,179 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-11-02 23:10:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:10:16,180 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:10:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:16,181 INFO L225 Difference]: With dead ends: 68 [2021-11-02 23:10:16,181 INFO L226 Difference]: Without dead ends: 61 [2021-11-02 23:10:16,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:10:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-02 23:10:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-11-02 23:10:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-02 23:10:16,188 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2021-11-02 23:10:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:16,188 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-02 23:10:16,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-02 23:10:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:10:16,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:16,190 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:16,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:16,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:16,411 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1774618206, now seen corresponding path program 11 times [2021-11-02 23:10:16,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:16,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855611627] [2021-11-02 23:10:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:16,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:16,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:16,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855611627] [2021-11-02 23:10:16,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855611627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:16,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821358500] [2021-11-02 23:10:16,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:16,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:16,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:16,605 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:16,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:10:16,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-02 23:10:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:16,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:10:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:17,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821358500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:17,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:17,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:10:17,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148071070] [2021-11-02 23:10:17,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:10:17,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:17,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:10:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:10:17,159 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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 23:10:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:17,211 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-11-02 23:10:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:10:17,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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 56 [2021-11-02 23:10:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:17,213 INFO L225 Difference]: With dead ends: 72 [2021-11-02 23:10:17,213 INFO L226 Difference]: Without dead ends: 65 [2021-11-02 23:10:17,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:10:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-02 23:10:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-11-02 23:10:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-11-02 23:10:17,219 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2021-11-02 23:10:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:17,219 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-11-02 23:10:17,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 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 23:10:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-11-02 23:10:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:10:17,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:17,221 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:17,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:17,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:17,447 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:17,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:17,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1030885993, now seen corresponding path program 12 times [2021-11-02 23:10:17,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:17,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587278256] [2021-11-02 23:10:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:17,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:17,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:17,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587278256] [2021-11-02 23:10:17,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587278256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:17,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399239880] [2021-11-02 23:10:17,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:10:17,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:17,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:17,630 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:17,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:10:17,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-02 23:10:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:17,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:10:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:18,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399239880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:18,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:18,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:10:18,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117923171] [2021-11-02 23:10:18,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:10:18,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:10:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:10:18,164 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:18,220 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-11-02 23:10:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:10:18,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:10:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:18,221 INFO L225 Difference]: With dead ends: 76 [2021-11-02 23:10:18,221 INFO L226 Difference]: Without dead ends: 69 [2021-11-02 23:10:18,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:10:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-02 23:10:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-11-02 23:10:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-02 23:10:18,231 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2021-11-02 23:10:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:18,232 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-02 23:10:18,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-02 23:10:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:10:18,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:18,234 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:18,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:18,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:10:18,459 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:18,459 INFO L85 PathProgramCache]: Analyzing trace with hash -242028624, now seen corresponding path program 13 times [2021-11-02 23:10:18,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:18,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023013227] [2021-11-02 23:10:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:18,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:18,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:18,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023013227] [2021-11-02 23:10:18,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023013227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:18,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187566403] [2021-11-02 23:10:18,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:18,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:18,640 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:18,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:10:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:18,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:10:18,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187566403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:19,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:19,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:10:19,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563999876] [2021-11-02 23:10:19,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:10:19,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:10:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:10:19,168 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:19,224 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-11-02 23:10:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:10:19,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:10:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:19,225 INFO L225 Difference]: With dead ends: 80 [2021-11-02 23:10:19,225 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 23:10:19,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:10:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 23:10:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-11-02 23:10:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-02 23:10:19,239 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2021-11-02 23:10:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:19,239 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-02 23:10:19,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-02 23:10:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:10:19,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:19,241 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:19,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:19,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:10:19,467 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:19,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1008348809, now seen corresponding path program 14 times [2021-11-02 23:10:19,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:19,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022834921] [2021-11-02 23:10:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:19,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:19,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:19,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022834921] [2021-11-02 23:10:19,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022834921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:19,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261646384] [2021-11-02 23:10:19,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:19,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:19,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:19,684 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:19,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:10:20,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:20,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:20,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:10:20,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:20,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261646384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:20,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:20,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:10:20,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860028113] [2021-11-02 23:10:20,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:10:20,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:20,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:10:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:10:20,244 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:20,299 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-11-02 23:10:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:10:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:10:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:20,300 INFO L225 Difference]: With dead ends: 84 [2021-11-02 23:10:20,300 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:10:20,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:10:20,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:10:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-11-02 23:10:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-11-02 23:10:20,305 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2021-11-02 23:10:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:20,305 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-11-02 23:10:20,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-11-02 23:10:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 23:10:20,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:20,307 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:20,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:20,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:10:20,521 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1965787202, now seen corresponding path program 15 times [2021-11-02 23:10:20,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:20,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588150522] [2021-11-02 23:10:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:20,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:20,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:20,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588150522] [2021-11-02 23:10:20,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588150522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:20,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617801947] [2021-11-02 23:10:20,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:20,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:20,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:20,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:20,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:10:21,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-02 23:10:21,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:10:21,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:21,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617801947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:21,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:21,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:10:21,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318170869] [2021-11-02 23:10:21,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:10:21,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:21,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:10:21,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:10:21,386 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:21,445 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-11-02 23:10:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:10:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-02 23:10:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:21,447 INFO L225 Difference]: With dead ends: 88 [2021-11-02 23:10:21,447 INFO L226 Difference]: Without dead ends: 81 [2021-11-02 23:10:21,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:10:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-02 23:10:21,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-11-02 23:10:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-11-02 23:10:21,451 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2021-11-02 23:10:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:21,452 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-11-02 23:10:21,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-11-02 23:10:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 23:10:21,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:21,453 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:21,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:21,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:21,654 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:21,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1374200453, now seen corresponding path program 16 times [2021-11-02 23:10:21,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:21,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63940205] [2021-11-02 23:10:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:21,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:21,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:21,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63940205] [2021-11-02 23:10:21,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63940205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:21,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681702681] [2021-11-02 23:10:21,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:21,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:21,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:21,932 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:21,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:10:22,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:22,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:10:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:22,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681702681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:22,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:22,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:10:22,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635877322] [2021-11-02 23:10:22,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:10:22,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:10:22,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:10:22,628 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 21 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 23:10:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:22,700 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-11-02 23:10:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:10:22,701 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 21 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 76 [2021-11-02 23:10:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:22,702 INFO L225 Difference]: With dead ends: 92 [2021-11-02 23:10:22,702 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:10:22,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:10:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:10:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-11-02 23:10:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-02 23:10:22,707 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2021-11-02 23:10:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:22,708 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-02 23:10:22,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 21 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 23:10:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-02 23:10:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:10:22,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:22,709 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:22,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:22,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:22,935 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash -909372980, now seen corresponding path program 17 times [2021-11-02 23:10:22,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:22,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075063261] [2021-11-02 23:10:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:22,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:23,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:23,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075063261] [2021-11-02 23:10:23,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075063261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:23,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692274319] [2021-11-02 23:10:23,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:23,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:23,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:23,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:10:23,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-02 23:10:23,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:10:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:24,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692274319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:24,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:24,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:10:24,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462293804] [2021-11-02 23:10:24,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:10:24,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:10:24,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:10:24,011 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:24,076 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-11-02 23:10:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:10:24,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 23:10:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:24,078 INFO L225 Difference]: With dead ends: 96 [2021-11-02 23:10:24,078 INFO L226 Difference]: Without dead ends: 89 [2021-11-02 23:10:24,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:10:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-02 23:10:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-11-02 23:10:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-11-02 23:10:24,086 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2021-11-02 23:10:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:24,087 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-11-02 23:10:24,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-11-02 23:10:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 23:10:24,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:24,089 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:24,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:24,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:24,303 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:24,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1203206765, now seen corresponding path program 18 times [2021-11-02 23:10:24,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:24,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960503063] [2021-11-02 23:10:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:24,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:24,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:24,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960503063] [2021-11-02 23:10:24,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960503063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:24,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412161596] [2021-11-02 23:10:24,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:10:24,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:24,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:24,577 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:24,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:10:25,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-11-02 23:10:25,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:25,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:10:25,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:25,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412161596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:25,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:25,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:10:25,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532513473] [2021-11-02 23:10:25,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:10:25,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:10:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:10:25,372 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:25,436 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-11-02 23:10:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:10:25,436 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 23:10:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:25,440 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:10:25,440 INFO L226 Difference]: Without dead ends: 93 [2021-11-02 23:10:25,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:10:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-02 23:10:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2021-11-02 23:10:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-02 23:10:25,448 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2021-11-02 23:10:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:25,448 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-02 23:10:25,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-02 23:10:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 23:10:25,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:25,450 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:25,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:25,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 23:10:25,675 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1749532122, now seen corresponding path program 19 times [2021-11-02 23:10:25,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:25,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055222098] [2021-11-02 23:10:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:25,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:26,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:26,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055222098] [2021-11-02 23:10:26,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055222098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:26,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16277499] [2021-11-02 23:10:26,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:26,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:26,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:26,043 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:26,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:10:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:26,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:10:26,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:26,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16277499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:26,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:26,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:10:26,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079522547] [2021-11-02 23:10:26,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:10:26,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:10:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:10:26,917 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 24 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 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 23:10:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:26,998 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-11-02 23:10:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:10:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 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 88 [2021-11-02 23:10:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:27,001 INFO L225 Difference]: With dead ends: 104 [2021-11-02 23:10:27,001 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 23:10:27,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:10:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 23:10:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2021-11-02 23:10:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 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 23:10:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-11-02 23:10:27,012 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2021-11-02 23:10:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:27,013 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-11-02 23:10:27,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.875) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 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 23:10:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-11-02 23:10:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 23:10:27,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:27,015 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:27,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:27,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:27,228 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash 433289889, now seen corresponding path program 20 times [2021-11-02 23:10:27,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:27,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273735315] [2021-11-02 23:10:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:27,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:27,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:27,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273735315] [2021-11-02 23:10:27,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273735315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:27,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925206963] [2021-11-02 23:10:27,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:27,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:27,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:27,572 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:27,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:10:28,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:28,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:28,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:10:28,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:28,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925206963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:28,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:28,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:10:28,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721498894] [2021-11-02 23:10:28,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:10:28,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:10:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:10:28,390 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 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 23:10:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:28,486 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-11-02 23:10:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:10:28,486 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 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 92 [2021-11-02 23:10:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:28,487 INFO L225 Difference]: With dead ends: 108 [2021-11-02 23:10:28,488 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 23:10:28,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:10:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 23:10:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-11-02 23:10:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 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 23:10:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-11-02 23:10:28,493 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 92 [2021-11-02 23:10:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:28,494 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-11-02 23:10:28,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 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 23:10:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-11-02 23:10:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 23:10:28,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:28,496 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:28,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:28,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:10:28,723 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1914010600, now seen corresponding path program 21 times [2021-11-02 23:10:28,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:28,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554634351] [2021-11-02 23:10:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:28,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:29,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:29,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554634351] [2021-11-02 23:10:29,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554634351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:29,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102758759] [2021-11-02 23:10:29,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:29,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:29,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:29,137 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:29,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:10:29,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-02 23:10:29,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:10:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:30,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102758759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:30,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:30,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:10:30,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540142032] [2021-11-02 23:10:30,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:10:30,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:10:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:10:30,110 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 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 23:10:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:30,194 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-11-02 23:10:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:10:30,195 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 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 96 [2021-11-02 23:10:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:30,197 INFO L225 Difference]: With dead ends: 112 [2021-11-02 23:10:30,197 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 23:10:30,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:10:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 23:10:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2021-11-02 23:10:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 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 23:10:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-11-02 23:10:30,204 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2021-11-02 23:10:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:30,205 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-11-02 23:10:30,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 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 23:10:30,206 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-11-02 23:10:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 23:10:30,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:30,207 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:30,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:30,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:10:30,435 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:30,436 INFO L85 PathProgramCache]: Analyzing trace with hash -346586705, now seen corresponding path program 22 times [2021-11-02 23:10:30,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:30,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45841690] [2021-11-02 23:10:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:30,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:30,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:30,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45841690] [2021-11-02 23:10:30,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45841690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:30,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569104695] [2021-11-02 23:10:30,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:30,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:30,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:30,804 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:30,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:10:31,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:31,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:10:31,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:31,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569104695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:31,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:31,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:10:31,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066776626] [2021-11-02 23:10:31,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:10:31,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:10:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:10:31,808 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 27 states, 27 states have (on average 3.888888888888889) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 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 23:10:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:31,915 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-11-02 23:10:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:10:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.888888888888889) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 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 100 [2021-11-02 23:10:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:31,917 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:10:31,917 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 23:10:31,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:10:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 23:10:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-11-02 23:10:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 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 23:10:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-11-02 23:10:31,936 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 100 [2021-11-02 23:10:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:31,937 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-11-02 23:10:31,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.888888888888889) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 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 23:10:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-11-02 23:10:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 23:10:31,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:31,939 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:31,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-02 23:10:32,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:10:32,151 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1157843958, now seen corresponding path program 23 times [2021-11-02 23:10:32,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:32,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971692523] [2021-11-02 23:10:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:32,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:32,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:32,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971692523] [2021-11-02 23:10:32,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971692523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:32,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521566618] [2021-11-02 23:10:32,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:32,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:32,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:32,567 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:32,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:10:33,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-11-02 23:10:33,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:10:33,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:33,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521566618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:33,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:33,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:10:33,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308681339] [2021-11-02 23:10:33,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:10:33,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:10:33,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:10:33,588 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 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 23:10:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:33,695 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2021-11-02 23:10:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:10:33,696 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 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 104 [2021-11-02 23:10:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:33,697 INFO L225 Difference]: With dead ends: 120 [2021-11-02 23:10:33,697 INFO L226 Difference]: Without dead ends: 113 [2021-11-02 23:10:33,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:10:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-02 23:10:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-11-02 23:10:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 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 23:10:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-11-02 23:10:33,704 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 104 [2021-11-02 23:10:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:33,705 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-11-02 23:10:33,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 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 23:10:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-11-02 23:10:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-02 23:10:33,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:33,706 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:33,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:33,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:10:33,914 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash -207447363, now seen corresponding path program 24 times [2021-11-02 23:10:33,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:33,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990684539] [2021-11-02 23:10:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:33,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:34,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:34,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990684539] [2021-11-02 23:10:34,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990684539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:34,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547616020] [2021-11-02 23:10:34,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:10:34,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:34,383 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:34,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:10:35,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-11-02 23:10:35,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:35,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:10:35,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:35,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547616020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:35,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:35,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:10:35,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955318735] [2021-11-02 23:10:35,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:10:35,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:10:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:10:35,698 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 29 states have internal predecessors, (113), 0 states have call successors, (0), 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 23:10:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:35,798 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-11-02 23:10:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:10:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 29 states have internal predecessors, (113), 0 states have call successors, (0), 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 108 [2021-11-02 23:10:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:35,801 INFO L225 Difference]: With dead ends: 124 [2021-11-02 23:10:35,801 INFO L226 Difference]: Without dead ends: 117 [2021-11-02 23:10:35,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:10:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-02 23:10:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-11-02 23:10:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 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 23:10:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-11-02 23:10:35,808 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 108 [2021-11-02 23:10:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:35,808 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-11-02 23:10:35,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 29 states have internal predecessors, (113), 0 states have call successors, (0), 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 23:10:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-11-02 23:10:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 23:10:35,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:35,810 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:35,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:36,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:10:36,024 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1864421884, now seen corresponding path program 25 times [2021-11-02 23:10:36,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:36,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688915718] [2021-11-02 23:10:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:36,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:36,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:36,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688915718] [2021-11-02 23:10:36,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688915718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:36,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610859025] [2021-11-02 23:10:36,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:36,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:36,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:36,559 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:36,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:10:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:10:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:37,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610859025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:37,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:37,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:10:37,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036054967] [2021-11-02 23:10:37,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:10:37,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:10:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:10:37,787 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 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 23:10:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:37,881 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-11-02 23:10:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:10:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 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 112 [2021-11-02 23:10:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:37,884 INFO L225 Difference]: With dead ends: 128 [2021-11-02 23:10:37,884 INFO L226 Difference]: Without dead ends: 121 [2021-11-02 23:10:37,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:10:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-02 23:10:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2021-11-02 23:10:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 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 23:10:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-11-02 23:10:37,890 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 112 [2021-11-02 23:10:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:37,890 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-11-02 23:10:37,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.9) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 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 23:10:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-11-02 23:10:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 23:10:37,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:37,892 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:37,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:38,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:38,119 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1266861515, now seen corresponding path program 26 times [2021-11-02 23:10:38,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:38,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843369535] [2021-11-02 23:10:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:38,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:38,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:38,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843369535] [2021-11-02 23:10:38,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843369535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:38,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275453920] [2021-11-02 23:10:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:38,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:38,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:38,608 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:38,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:10:39,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:10:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:39,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275453920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:39,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:39,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:10:39,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768629975] [2021-11-02 23:10:39,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:10:39,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:10:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:39,627 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 31 states, 31 states have (on average 3.903225806451613) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 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 23:10:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:39,732 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-11-02 23:10:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:10:39,732 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.903225806451613) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 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 116 [2021-11-02 23:10:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:39,733 INFO L225 Difference]: With dead ends: 132 [2021-11-02 23:10:39,733 INFO L226 Difference]: Without dead ends: 125 [2021-11-02 23:10:39,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-02 23:10:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2021-11-02 23:10:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 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 23:10:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2021-11-02 23:10:39,739 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2021-11-02 23:10:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:39,740 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2021-11-02 23:10:39,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.903225806451613) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 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 23:10:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2021-11-02 23:10:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 23:10:39,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:39,742 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:39,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:39,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:39,967 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1467425298, now seen corresponding path program 27 times [2021-11-02 23:10:39,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:39,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393754332] [2021-11-02 23:10:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:39,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:40,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:40,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393754332] [2021-11-02 23:10:40,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393754332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:40,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445029374] [2021-11-02 23:10:40,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:40,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:40,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:40,529 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:40,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:10:41,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-11-02 23:10:41,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:10:41,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:41,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445029374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:41,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:41,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:10:41,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588214293] [2021-11-02 23:10:41,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:10:41,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:10:41,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:10:41,685 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 32 states, 32 states have (on average 3.90625) internal successors, (125), 32 states have internal predecessors, (125), 0 states have call successors, (0), 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 23:10:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:41,796 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2021-11-02 23:10:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:10:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.90625) internal successors, (125), 32 states have internal predecessors, (125), 0 states have call successors, (0), 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 120 [2021-11-02 23:10:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:41,801 INFO L225 Difference]: With dead ends: 136 [2021-11-02 23:10:41,801 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 23:10:41,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:10:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 23:10:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2021-11-02 23:10:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 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 23:10:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-11-02 23:10:41,819 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 120 [2021-11-02 23:10:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:41,820 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-11-02 23:10:41,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.90625) internal successors, (125), 32 states have internal predecessors, (125), 0 states have call successors, (0), 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 23:10:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-11-02 23:10:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 23:10:41,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:41,821 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:41,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 23:10:42,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:42,027 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1573257945, now seen corresponding path program 28 times [2021-11-02 23:10:42,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:42,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539401462] [2021-11-02 23:10:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:42,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:42,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:42,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539401462] [2021-11-02 23:10:42,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539401462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:42,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600726119] [2021-11-02 23:10:42,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:42,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:42,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:42,584 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:42,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:10:43,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:43,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:43,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:10:43,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:43,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600726119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:43,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:43,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-02 23:10:43,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204720929] [2021-11-02 23:10:43,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:10:43,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:43,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:10:43,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:10:43,772 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 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 23:10:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:43,887 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-11-02 23:10:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:10:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 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 124 [2021-11-02 23:10:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:43,889 INFO L225 Difference]: With dead ends: 140 [2021-11-02 23:10:43,889 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 23:10:43,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:10:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 23:10:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2021-11-02 23:10:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 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 23:10:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-11-02 23:10:43,895 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 124 [2021-11-02 23:10:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:43,896 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-11-02 23:10:43,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 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 23:10:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-11-02 23:10:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 23:10:43,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:43,897 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:43,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:44,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 23:10:44,099 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash -325507040, now seen corresponding path program 29 times [2021-11-02 23:10:44,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:44,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269086735] [2021-11-02 23:10:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:44,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:44,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:44,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269086735] [2021-11-02 23:10:44,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269086735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:44,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771053782] [2021-11-02 23:10:44,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:44,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:44,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:44,695 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:44,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:10:45,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-02 23:10:45,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:45,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:10:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:46,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771053782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:46,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:46,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-02 23:10:46,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747405964] [2021-11-02 23:10:46,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 23:10:46,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:46,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 23:10:46,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:10:46,151 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 34 states, 34 states have (on average 3.911764705882353) internal successors, (133), 34 states have internal predecessors, (133), 0 states have call successors, (0), 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 23:10:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:46,271 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2021-11-02 23:10:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:10:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.911764705882353) internal successors, (133), 34 states have internal predecessors, (133), 0 states have call successors, (0), 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 128 [2021-11-02 23:10:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:46,273 INFO L225 Difference]: With dead ends: 144 [2021-11-02 23:10:46,273 INFO L226 Difference]: Without dead ends: 137 [2021-11-02 23:10:46,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:10:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-02 23:10:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2021-11-02 23:10:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 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 23:10:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-11-02 23:10:46,279 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 128 [2021-11-02 23:10:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:46,280 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-11-02 23:10:46,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.911764705882353) internal successors, (133), 34 states have internal predecessors, (133), 0 states have call successors, (0), 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 23:10:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-11-02 23:10:46,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-02 23:10:46,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:46,282 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:46,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-02 23:10:46,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:46,495 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash -415608345, now seen corresponding path program 30 times [2021-11-02 23:10:46,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:46,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381635018] [2021-11-02 23:10:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:46,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:47,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:47,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381635018] [2021-11-02 23:10:47,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381635018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:47,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077170770] [2021-11-02 23:10:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:10:47,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:47,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:47,140 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:47,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:10:48,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-11-02 23:10:48,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:10:48,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:48,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077170770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:48,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:48,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-02 23:10:48,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65937280] [2021-11-02 23:10:48,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:10:48,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:48,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:10:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:10:48,604 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 35 states, 35 states have (on average 3.914285714285714) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 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 23:10:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:48,694 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2021-11-02 23:10:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:10:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.914285714285714) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 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 132 [2021-11-02 23:10:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:48,705 INFO L225 Difference]: With dead ends: 148 [2021-11-02 23:10:48,705 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 23:10:48,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:10:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 23:10:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2021-11-02 23:10:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 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 23:10:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-11-02 23:10:48,713 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 132 [2021-11-02 23:10:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:48,713 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-11-02 23:10:48,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.914285714285714) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 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 23:10:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-11-02 23:10:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-02 23:10:48,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:48,715 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:48,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:48,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:10:48,939 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:48,940 INFO L85 PathProgramCache]: Analyzing trace with hash -166510546, now seen corresponding path program 31 times [2021-11-02 23:10:48,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:48,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382635179] [2021-11-02 23:10:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:48,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:49,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:49,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382635179] [2021-11-02 23:10:49,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382635179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:49,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741583078] [2021-11-02 23:10:49,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:49,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:49,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:49,598 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:49,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:10:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 23:10:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:51,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741583078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:51,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:51,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-02 23:10:51,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059222520] [2021-11-02 23:10:51,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:10:51,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:10:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:10:51,026 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 36 states, 36 states have (on average 3.9166666666666665) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 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 23:10:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:51,199 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2021-11-02 23:10:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:10:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.9166666666666665) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 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 136 [2021-11-02 23:10:51,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:51,202 INFO L225 Difference]: With dead ends: 152 [2021-11-02 23:10:51,202 INFO L226 Difference]: Without dead ends: 145 [2021-11-02 23:10:51,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:10:51,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-02 23:10:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2021-11-02 23:10:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 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 23:10:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2021-11-02 23:10:51,209 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2021-11-02 23:10:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:51,210 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2021-11-02 23:10:51,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.9166666666666665) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 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 23:10:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2021-11-02 23:10:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-02 23:10:51,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:51,211 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:51,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:51,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 23:10:51,429 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:51,429 INFO L85 PathProgramCache]: Analyzing trace with hash -156388619, now seen corresponding path program 32 times [2021-11-02 23:10:51,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:51,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715189096] [2021-11-02 23:10:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:51,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:52,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:52,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715189096] [2021-11-02 23:10:52,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715189096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:52,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114571542] [2021-11-02 23:10:52,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:52,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:52,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:52,125 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:52,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:10:53,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:10:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:53,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114571542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:53,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:53,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-02 23:10:53,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403527588] [2021-11-02 23:10:53,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 23:10:53,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 23:10:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:10:53,616 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 37 states, 37 states have (on average 3.918918918918919) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 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 23:10:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:53,726 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-11-02 23:10:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:10:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.918918918918919) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 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 140 [2021-11-02 23:10:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:53,728 INFO L225 Difference]: With dead ends: 156 [2021-11-02 23:10:53,728 INFO L226 Difference]: Without dead ends: 149 [2021-11-02 23:10:53,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:10:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-02 23:10:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2021-11-02 23:10:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 0 states have call successors, (0), 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 23:10:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-11-02 23:10:53,736 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 140 [2021-11-02 23:10:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:53,736 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-11-02 23:10:53,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.918918918918919) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 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 23:10:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-11-02 23:10:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-02 23:10:53,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:53,738 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:53,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:53,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 23:10:53,959 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:53,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1806920252, now seen corresponding path program 33 times [2021-11-02 23:10:53,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:53,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169821519] [2021-11-02 23:10:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:53,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:54,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:54,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169821519] [2021-11-02 23:10:54,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169821519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:54,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108141870] [2021-11-02 23:10:54,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:54,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:54,758 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:54,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:10:56,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-11-02 23:10:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:10:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:56,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108141870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:56,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:56,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-02 23:10:56,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391046946] [2021-11-02 23:10:56,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:10:56,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:10:56,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:10:56,527 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 0 states have call successors, (0), 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 23:10:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:56,648 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2021-11-02 23:10:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:10:56,649 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 0 states have call successors, (0), 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 144 [2021-11-02 23:10:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:56,650 INFO L225 Difference]: With dead ends: 160 [2021-11-02 23:10:56,651 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 23:10:56,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:10:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 23:10:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2021-11-02 23:10:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 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 23:10:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2021-11-02 23:10:56,658 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 144 [2021-11-02 23:10:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:56,659 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2021-11-02 23:10:56,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 0 states have call successors, (0), 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 23:10:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2021-11-02 23:10:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-02 23:10:56,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:56,661 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:56,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:56,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:10:56,884 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:56,884 INFO L85 PathProgramCache]: Analyzing trace with hash -319937021, now seen corresponding path program 34 times [2021-11-02 23:10:56,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:56,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004379138] [2021-11-02 23:10:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:56,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:57,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:57,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004379138] [2021-11-02 23:10:57,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004379138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:57,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465015186] [2021-11-02 23:10:57,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:57,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:57,720 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:57,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:10:58,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:58,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:10:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:59,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465015186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:59,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:59,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-02 23:10:59,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053124572] [2021-11-02 23:10:59,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 23:10:59,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 23:10:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:10:59,384 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 0 states have call successors, (0), 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 23:10:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:59,511 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2021-11-02 23:10:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:10:59,517 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 0 states have call successors, (0), 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 148 [2021-11-02 23:10:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:59,519 INFO L225 Difference]: With dead ends: 164 [2021-11-02 23:10:59,519 INFO L226 Difference]: Without dead ends: 157 [2021-11-02 23:10:59,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:10:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-02 23:10:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-11-02 23:10:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 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 23:10:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2021-11-02 23:10:59,526 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 148 [2021-11-02 23:10:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:59,527 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2021-11-02 23:10:59,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 0 states have call successors, (0), 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 23:10:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2021-11-02 23:10:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-02 23:10:59,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:59,529 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:59,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:59,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:59,739 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1756912054, now seen corresponding path program 35 times [2021-11-02 23:10:59,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:59,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687966370] [2021-11-02 23:10:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:59,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:00,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:00,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687966370] [2021-11-02 23:11:00,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687966370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:00,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773335496] [2021-11-02 23:11:00,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:11:00,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:00,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:00,561 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:00,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:11:01,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-11-02 23:11:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:11:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:02,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773335496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:02,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:02,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-02 23:11:02,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733940020] [2021-11-02 23:11:02,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 23:11:02,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:02,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 23:11:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:11:02,374 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 40 states, 40 states have (on average 3.925) internal successors, (157), 40 states have internal predecessors, (157), 0 states have call successors, (0), 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 23:11:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:02,492 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2021-11-02 23:11:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:11:02,493 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.925) internal successors, (157), 40 states have internal predecessors, (157), 0 states have call successors, (0), 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 152 [2021-11-02 23:11:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:02,495 INFO L225 Difference]: With dead ends: 168 [2021-11-02 23:11:02,495 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:11:02,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:11:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:11:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-11-02 23:11:02,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 0 states have call successors, (0), 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 23:11:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2021-11-02 23:11:02,503 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 152 [2021-11-02 23:11:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:02,503 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2021-11-02 23:11:02,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.925) internal successors, (157), 40 states have internal predecessors, (157), 0 states have call successors, (0), 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 23:11:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2021-11-02 23:11:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-02 23:11:02,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:02,505 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:02,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:02,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:11:02,719 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:02,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2093591313, now seen corresponding path program 36 times [2021-11-02 23:11:02,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:02,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590196296] [2021-11-02 23:11:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:02,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:03,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:03,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590196296] [2021-11-02 23:11:03,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590196296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:03,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793124992] [2021-11-02 23:11:03,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:11:03,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:03,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:03,545 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:03,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:11:04,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-11-02 23:11:04,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:04,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:11:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:05,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793124992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:05,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:05,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-02 23:11:05,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370554098] [2021-11-02 23:11:05,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:11:05,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:11:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:11:05,449 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 41 states, 41 states have (on average 3.926829268292683) internal successors, (161), 41 states have internal predecessors, (161), 0 states have call successors, (0), 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 23:11:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:05,570 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-11-02 23:11:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:11:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.926829268292683) internal successors, (161), 41 states have internal predecessors, (161), 0 states have call successors, (0), 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 156 [2021-11-02 23:11:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:05,571 INFO L225 Difference]: With dead ends: 172 [2021-11-02 23:11:05,571 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 23:11:05,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:11:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 23:11:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2021-11-02 23:11:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 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 23:11:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-11-02 23:11:05,578 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2021-11-02 23:11:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:05,579 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-11-02 23:11:05,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.926829268292683) internal successors, (161), 41 states have internal predecessors, (161), 0 states have call successors, (0), 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 23:11:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-11-02 23:11:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 23:11:05,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:05,580 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:05,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-02 23:11:05,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:11:05,781 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:05,782 INFO L85 PathProgramCache]: Analyzing trace with hash 345896024, now seen corresponding path program 37 times [2021-11-02 23:11:05,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:05,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855385159] [2021-11-02 23:11:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:05,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:06,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:06,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855385159] [2021-11-02 23:11:06,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855385159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:06,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334645265] [2021-11-02 23:11:06,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:11:06,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:06,597 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:06,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:11:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 23:11:07,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:08,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334645265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:08,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:08,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-02 23:11:08,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829296161] [2021-11-02 23:11:08,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 23:11:08,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:08,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 23:11:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:11:08,571 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 42 states have internal predecessors, (165), 0 states have call successors, (0), 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 23:11:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:08,722 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2021-11-02 23:11:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:11:08,722 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 42 states have internal predecessors, (165), 0 states have call successors, (0), 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 160 [2021-11-02 23:11:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:08,724 INFO L225 Difference]: With dead ends: 176 [2021-11-02 23:11:08,724 INFO L226 Difference]: Without dead ends: 169 [2021-11-02 23:11:08,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:11:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-02 23:11:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2021-11-02 23:11:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 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 23:11:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-11-02 23:11:08,732 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 160 [2021-11-02 23:11:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:08,733 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-11-02 23:11:08,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 42 states have internal predecessors, (165), 0 states have call successors, (0), 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 23:11:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-11-02 23:11:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-02 23:11:08,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:08,735 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:08,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:08,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-02 23:11:08,963 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1425128929, now seen corresponding path program 38 times [2021-11-02 23:11:08,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:08,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990275604] [2021-11-02 23:11:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:08,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:09,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:09,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990275604] [2021-11-02 23:11:09,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990275604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:09,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505554780] [2021-11-02 23:11:09,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:11:09,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:09,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:09,971 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:09,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:11:11,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:11:11,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:11,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:11:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:11,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505554780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:11,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:11,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-02 23:11:11,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653233460] [2021-11-02 23:11:11,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 23:11:11,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 23:11:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:11:11,958 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 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 23:11:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:12,102 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2021-11-02 23:11:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:11:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 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 164 [2021-11-02 23:11:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:12,105 INFO L225 Difference]: With dead ends: 180 [2021-11-02 23:11:12,105 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 23:11:12,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:11:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 23:11:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2021-11-02 23:11:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 0 states have call successors, (0), 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 23:11:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2021-11-02 23:11:12,113 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 164 [2021-11-02 23:11:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:12,113 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2021-11-02 23:11:12,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 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 23:11:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2021-11-02 23:11:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-02 23:11:12,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:12,115 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:12,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:12,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:11:12,331 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash -779856794, now seen corresponding path program 39 times [2021-11-02 23:11:12,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:12,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141861] [2021-11-02 23:11:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:12,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:13,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:13,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141861] [2021-11-02 23:11:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:13,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896327167] [2021-11-02 23:11:13,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:11:13,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:13,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:13,279 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:13,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:11:14,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2021-11-02 23:11:14,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 23:11:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896327167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:15,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:15,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-02 23:11:15,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401065243] [2021-11-02 23:11:15,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 23:11:15,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 23:11:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:11:15,541 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 44 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 44 states have internal predecessors, (173), 0 states have call successors, (0), 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 23:11:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:15,719 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-11-02 23:11:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:11:15,720 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 44 states have internal predecessors, (173), 0 states have call successors, (0), 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 168 [2021-11-02 23:11:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:15,722 INFO L225 Difference]: With dead ends: 184 [2021-11-02 23:11:15,722 INFO L226 Difference]: Without dead ends: 177 [2021-11-02 23:11:15,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:11:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-02 23:11:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2021-11-02 23:11:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 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 23:11:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2021-11-02 23:11:15,740 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 168 [2021-11-02 23:11:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:15,743 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2021-11-02 23:11:15,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 44 states have internal predecessors, (173), 0 states have call successors, (0), 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 23:11:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2021-11-02 23:11:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-02 23:11:15,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:15,746 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:15,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:15,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:15,961 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -829822163, now seen corresponding path program 40 times [2021-11-02 23:11:15,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:15,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476629608] [2021-11-02 23:11:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:15,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:17,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:17,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476629608] [2021-11-02 23:11:17,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476629608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:17,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700635223] [2021-11-02 23:11:17,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:11:17,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:17,031 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:17,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:11:18,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:11:18,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:18,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:11:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:19,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700635223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:19,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:19,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-02 23:11:19,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230409722] [2021-11-02 23:11:19,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 23:11:19,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:19,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 23:11:19,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:11:19,144 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 45 states, 45 states have (on average 3.933333333333333) internal successors, (177), 45 states have internal predecessors, (177), 0 states have call successors, (0), 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 23:11:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:19,287 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2021-11-02 23:11:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:11:19,287 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.933333333333333) internal successors, (177), 45 states have internal predecessors, (177), 0 states have call successors, (0), 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 172 [2021-11-02 23:11:19,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:19,289 INFO L225 Difference]: With dead ends: 188 [2021-11-02 23:11:19,289 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 23:11:19,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:11:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 23:11:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2021-11-02 23:11:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 0 states have call successors, (0), 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 23:11:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2021-11-02 23:11:19,296 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 172 [2021-11-02 23:11:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:19,297 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2021-11-02 23:11:19,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.933333333333333) internal successors, (177), 45 states have internal predecessors, (177), 0 states have call successors, (0), 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 23:11:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2021-11-02 23:11:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 23:11:19,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:19,299 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:19,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:19,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-02 23:11:19,527 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash 231261812, now seen corresponding path program 41 times [2021-11-02 23:11:19,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:19,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856031532] [2021-11-02 23:11:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:19,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:20,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:20,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856031532] [2021-11-02 23:11:20,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856031532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:20,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129432397] [2021-11-02 23:11:20,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:11:20,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:20,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:20,714 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:20,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:11:22,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-11-02 23:11:22,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:11:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129432397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:23,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:23,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-02 23:11:23,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736545293] [2021-11-02 23:11:23,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:11:23,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:11:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:11:23,103 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 0 states have call successors, (0), 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 23:11:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:23,282 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2021-11-02 23:11:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:11:23,282 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 0 states have call successors, (0), 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 176 [2021-11-02 23:11:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:23,287 INFO L225 Difference]: With dead ends: 192 [2021-11-02 23:11:23,287 INFO L226 Difference]: Without dead ends: 185 [2021-11-02 23:11:23,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:11:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-02 23:11:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-02 23:11:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 0 states have call successors, (0), 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 23:11:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2021-11-02 23:11:23,296 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 176 [2021-11-02 23:11:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:23,297 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2021-11-02 23:11:23,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 0 states have call successors, (0), 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 23:11:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2021-11-02 23:11:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-02 23:11:23,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:23,299 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:23,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-02 23:11:23,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 23:11:23,515 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1878350277, now seen corresponding path program 42 times [2021-11-02 23:11:23,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:23,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136441092] [2021-11-02 23:11:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:23,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:24,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:24,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136441092] [2021-11-02 23:11:24,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136441092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:24,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205764879] [2021-11-02 23:11:24,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:11:24,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:24,624 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:24,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:11:26,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-11-02 23:11:26,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:11:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:27,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205764879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:27,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:27,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-02 23:11:27,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946390763] [2021-11-02 23:11:27,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 23:11:27,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 23:11:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:11:27,140 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 0 states have call successors, (0), 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 23:11:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:27,312 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2021-11-02 23:11:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:11:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 0 states have call successors, (0), 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 180 [2021-11-02 23:11:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:27,315 INFO L225 Difference]: With dead ends: 196 [2021-11-02 23:11:27,315 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 23:11:27,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:11:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 23:11:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2021-11-02 23:11:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 0 states have call successors, (0), 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 23:11:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2021-11-02 23:11:27,324 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 180 [2021-11-02 23:11:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:27,324 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2021-11-02 23:11:27,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 0 states have call successors, (0), 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 23:11:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2021-11-02 23:11:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-02 23:11:27,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:27,326 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:27,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:27,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:27,543 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1530481282, now seen corresponding path program 43 times [2021-11-02 23:11:27,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:27,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435387331] [2021-11-02 23:11:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:27,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:28,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:28,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435387331] [2021-11-02 23:11:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435387331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:28,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86965411] [2021-11-02 23:11:28,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:11:28,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:28,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:28,644 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:28,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:11:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:11:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:31,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86965411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:31,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:31,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-02 23:11:31,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403961861] [2021-11-02 23:11:31,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 23:11:31,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:31,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 23:11:31,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:11:31,031 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 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 23:11:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:31,171 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2021-11-02 23:11:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:11:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 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 184 [2021-11-02 23:11:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:31,176 INFO L225 Difference]: With dead ends: 200 [2021-11-02 23:11:31,176 INFO L226 Difference]: Without dead ends: 193 [2021-11-02 23:11:31,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:11:31,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-02 23:11:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2021-11-02 23:11:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 0 states have call successors, (0), 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 23:11:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2021-11-02 23:11:31,183 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 184 [2021-11-02 23:11:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:31,183 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2021-11-02 23:11:31,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 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 23:11:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2021-11-02 23:11:31,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-02 23:11:31,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:31,185 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:31,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-02 23:11:31,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:31,395 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash -362908855, now seen corresponding path program 44 times [2021-11-02 23:11:31,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:31,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689840765] [2021-11-02 23:11:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:31,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:32,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:32,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689840765] [2021-11-02 23:11:32,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689840765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:32,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710612200] [2021-11-02 23:11:32,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:11:32,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:32,541 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:32,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:11:34,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:11:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:34,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:11:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:35,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710612200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:35,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:35,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-02 23:11:35,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063177346] [2021-11-02 23:11:35,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 23:11:35,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 23:11:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:11:35,005 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 49 states, 49 states have (on average 3.938775510204082) internal successors, (193), 49 states have internal predecessors, (193), 0 states have call successors, (0), 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 23:11:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:35,177 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2021-11-02 23:11:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:11:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.938775510204082) internal successors, (193), 49 states have internal predecessors, (193), 0 states have call successors, (0), 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 188 [2021-11-02 23:11:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:35,179 INFO L225 Difference]: With dead ends: 204 [2021-11-02 23:11:35,179 INFO L226 Difference]: Without dead ends: 197 [2021-11-02 23:11:35,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:11:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-02 23:11:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-11-02 23:11:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 0 states have call successors, (0), 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 23:11:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2021-11-02 23:11:35,187 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 188 [2021-11-02 23:11:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:35,188 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2021-11-02 23:11:35,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.938775510204082) internal successors, (193), 49 states have internal predecessors, (193), 0 states have call successors, (0), 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 23:11:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2021-11-02 23:11:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-02 23:11:35,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:35,190 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:35,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:35,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:11:35,411 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1650204528, now seen corresponding path program 45 times [2021-11-02 23:11:35,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:35,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765112744] [2021-11-02 23:11:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:35,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:36,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:36,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765112744] [2021-11-02 23:11:36,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765112744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:36,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892177948] [2021-11-02 23:11:36,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:11:36,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:36,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:36,575 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:36,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:11:38,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-02 23:11:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:38,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 23:11:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:39,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892177948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:39,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:39,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-02 23:11:39,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294986694] [2021-11-02 23:11:39,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:11:39,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:11:39,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:11:39,293 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 50 states, 50 states have (on average 3.94) internal successors, (197), 50 states have internal predecessors, (197), 0 states have call successors, (0), 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 23:11:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:39,494 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2021-11-02 23:11:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 23:11:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.94) internal successors, (197), 50 states have internal predecessors, (197), 0 states have call successors, (0), 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 192 [2021-11-02 23:11:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:39,496 INFO L225 Difference]: With dead ends: 208 [2021-11-02 23:11:39,497 INFO L226 Difference]: Without dead ends: 201 [2021-11-02 23:11:39,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:11:39,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-02 23:11:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2021-11-02 23:11:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 0 states have call successors, (0), 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 23:11:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2021-11-02 23:11:39,505 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 192 [2021-11-02 23:11:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:39,506 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2021-11-02 23:11:39,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.94) internal successors, (197), 50 states have internal predecessors, (197), 0 states have call successors, (0), 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 23:11:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2021-11-02 23:11:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-02 23:11:39,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:39,509 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:39,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:39,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 23:11:39,723 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash 710103639, now seen corresponding path program 46 times [2021-11-02 23:11:39,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:39,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649725114] [2021-11-02 23:11:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:39,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:40,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:40,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649725114] [2021-11-02 23:11:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649725114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:40,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022961699] [2021-11-02 23:11:40,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:11:40,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:40,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:40,931 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:40,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:11:42,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:11:42,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:11:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:43,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022961699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:43,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:43,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-02 23:11:43,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080243260] [2021-11-02 23:11:43,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 23:11:43,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 23:11:43,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:11:43,595 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 51 states, 51 states have (on average 3.9411764705882355) internal successors, (201), 51 states have internal predecessors, (201), 0 states have call successors, (0), 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 23:11:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:43,791 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-11-02 23:11:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:11:43,792 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.9411764705882355) internal successors, (201), 51 states have internal predecessors, (201), 0 states have call successors, (0), 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 196 [2021-11-02 23:11:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:43,794 INFO L225 Difference]: With dead ends: 212 [2021-11-02 23:11:43,794 INFO L226 Difference]: Without dead ends: 205 [2021-11-02 23:11:43,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:11:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-02 23:11:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2021-11-02 23:11:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 0 states have call successors, (0), 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 23:11:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2021-11-02 23:11:43,802 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 196 [2021-11-02 23:11:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:43,802 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2021-11-02 23:11:43,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.9411764705882355) internal successors, (201), 51 states have internal predecessors, (201), 0 states have call successors, (0), 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 23:11:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2021-11-02 23:11:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-02 23:11:43,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:43,804 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:43,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:44,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:11:44,031 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash 181831838, now seen corresponding path program 47 times [2021-11-02 23:11:44,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:44,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852321356] [2021-11-02 23:11:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:44,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:45,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:45,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852321356] [2021-11-02 23:11:45,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852321356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:45,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909542655] [2021-11-02 23:11:45,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:11:45,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:45,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:45,399 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:45,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:11:47,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-02 23:11:47,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 23:11:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:48,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909542655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:48,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:48,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-02 23:11:48,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625674804] [2021-11-02 23:11:48,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 23:11:48,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 23:11:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:11:48,272 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 52 states, 52 states have (on average 3.9423076923076925) internal successors, (205), 52 states have internal predecessors, (205), 0 states have call successors, (0), 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 23:11:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:48,413 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2021-11-02 23:11:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 23:11:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.9423076923076925) internal successors, (205), 52 states have internal predecessors, (205), 0 states have call successors, (0), 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 200 [2021-11-02 23:11:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:48,415 INFO L225 Difference]: With dead ends: 216 [2021-11-02 23:11:48,416 INFO L226 Difference]: Without dead ends: 209 [2021-11-02 23:11:48,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:11:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-02 23:11:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2021-11-02 23:11:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0097560975609756) internal successors, (207), 205 states have internal predecessors, (207), 0 states have call successors, (0), 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 23:11:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2021-11-02 23:11:48,423 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 200 [2021-11-02 23:11:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:48,423 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2021-11-02 23:11:48,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.9423076923076925) internal successors, (205), 52 states have internal predecessors, (205), 0 states have call successors, (0), 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 23:11:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2021-11-02 23:11:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-02 23:11:48,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:48,426 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:48,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:48,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:48,647 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash -289979547, now seen corresponding path program 48 times [2021-11-02 23:11:48,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:48,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638554596] [2021-11-02 23:11:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:48,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:49,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:49,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638554596] [2021-11-02 23:11:49,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638554596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:49,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353778735] [2021-11-02 23:11:49,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:11:49,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:49,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:49,912 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:49,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:11:52,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2021-11-02 23:11:52,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:11:52,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:52,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353778735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:52,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:52,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-02 23:11:52,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177068221] [2021-11-02 23:11:52,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 23:11:52,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 23:11:52,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:11:52,895 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 53 states, 53 states have (on average 3.943396226415094) internal successors, (209), 53 states have internal predecessors, (209), 0 states have call successors, (0), 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 23:11:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:53,055 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2021-11-02 23:11:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 23:11:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.943396226415094) internal successors, (209), 53 states have internal predecessors, (209), 0 states have call successors, (0), 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 204 [2021-11-02 23:11:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:53,057 INFO L225 Difference]: With dead ends: 220 [2021-11-02 23:11:53,058 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 23:11:53,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:11:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 23:11:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-11-02 23:11:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 0 states have call successors, (0), 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 23:11:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2021-11-02 23:11:53,067 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 204 [2021-11-02 23:11:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:53,068 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2021-11-02 23:11:53,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.943396226415094) internal successors, (209), 53 states have internal predecessors, (209), 0 states have call successors, (0), 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 23:11:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2021-11-02 23:11:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-02 23:11:53,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:53,071 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:53,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-02 23:11:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:53,295 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:53,295 INFO L85 PathProgramCache]: Analyzing trace with hash 715080364, now seen corresponding path program 49 times [2021-11-02 23:11:53,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:53,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400746688] [2021-11-02 23:11:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:53,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:54,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:54,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400746688] [2021-11-02 23:11:54,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400746688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:54,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174721300] [2021-11-02 23:11:54,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:11:54,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:54,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:54,607 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:54,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:11:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:56,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:11:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:57,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174721300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:57,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:57,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-02 23:11:57,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193704172] [2021-11-02 23:11:57,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 23:11:57,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 23:11:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:11:57,504 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 54 states, 54 states have (on average 3.9444444444444446) internal successors, (213), 54 states have internal predecessors, (213), 0 states have call successors, (0), 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 23:11:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:57,678 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2021-11-02 23:11:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:11:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.9444444444444446) internal successors, (213), 54 states have internal predecessors, (213), 0 states have call successors, (0), 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 208 [2021-11-02 23:11:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:57,680 INFO L225 Difference]: With dead ends: 224 [2021-11-02 23:11:57,681 INFO L226 Difference]: Without dead ends: 217 [2021-11-02 23:11:57,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:11:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-02 23:11:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2021-11-02 23:11:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.0093896713615023) internal successors, (215), 213 states have internal predecessors, (215), 0 states have call successors, (0), 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 23:11:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2021-11-02 23:11:57,689 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 208 [2021-11-02 23:11:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:57,689 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2021-11-02 23:11:57,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.9444444444444446) internal successors, (213), 54 states have internal predecessors, (213), 0 states have call successors, (0), 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 23:11:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2021-11-02 23:11:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-02 23:11:57,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:57,692 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:57,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:57,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:57,907 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:57,907 INFO L85 PathProgramCache]: Analyzing trace with hash 676873843, now seen corresponding path program 50 times [2021-11-02 23:11:57,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:57,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351684627] [2021-11-02 23:11:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:57,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:59,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:59,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351684627] [2021-11-02 23:11:59,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351684627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:59,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907304145] [2021-11-02 23:11:59,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:11:59,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:59,241 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:59,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:12:01,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:12:01,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:12:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907304145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:02,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:02,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-02 23:12:02,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885710342] [2021-11-02 23:12:02,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-02 23:12:02,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:02,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-02 23:12:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:12:02,126 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 55 states, 55 states have (on average 3.9454545454545453) internal successors, (217), 55 states have internal predecessors, (217), 0 states have call successors, (0), 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 23:12:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:02,291 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2021-11-02 23:12:02,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:12:02,291 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.9454545454545453) internal successors, (217), 55 states have internal predecessors, (217), 0 states have call successors, (0), 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 212 [2021-11-02 23:12:02,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:02,293 INFO L225 Difference]: With dead ends: 228 [2021-11-02 23:12:02,293 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 23:12:02,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:12:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 23:12:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2021-11-02 23:12:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 0 states have call successors, (0), 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 23:12:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2021-11-02 23:12:02,300 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 212 [2021-11-02 23:12:02,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:02,301 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2021-11-02 23:12:02,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.9454545454545453) internal successors, (217), 55 states have internal predecessors, (217), 0 states have call successors, (0), 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 23:12:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2021-11-02 23:12:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-02 23:12:02,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:02,303 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:02,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-02 23:12:02,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:02,503 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash -691269958, now seen corresponding path program 51 times [2021-11-02 23:12:02,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:02,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768069852] [2021-11-02 23:12:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:02,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:04,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:04,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768069852] [2021-11-02 23:12:04,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768069852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:04,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181823853] [2021-11-02 23:12:04,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:12:04,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:04,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:04,103 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:04,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:12:06,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2021-11-02 23:12:06,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 23:12:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:07,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181823853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:07,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:07,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-02 23:12:07,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512203428] [2021-11-02 23:12:07,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 23:12:07,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:07,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 23:12:07,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:12:07,386 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand has 56 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 56 states have internal predecessors, (221), 0 states have call successors, (0), 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 23:12:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:07,585 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2021-11-02 23:12:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 23:12:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 56 states have internal predecessors, (221), 0 states have call successors, (0), 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 216 [2021-11-02 23:12:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:07,588 INFO L225 Difference]: With dead ends: 232 [2021-11-02 23:12:07,588 INFO L226 Difference]: Without dead ends: 225 [2021-11-02 23:12:07,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:12:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-02 23:12:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2021-11-02 23:12:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 0 states have call successors, (0), 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 23:12:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2021-11-02 23:12:07,596 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 216 [2021-11-02 23:12:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:07,597 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2021-11-02 23:12:07,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 56 states have internal predecessors, (221), 0 states have call successors, (0), 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 23:12:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2021-11-02 23:12:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-02 23:12:07,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:07,599 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:07,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:07,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:07,816 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash 436493185, now seen corresponding path program 52 times [2021-11-02 23:12:07,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:07,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223348223] [2021-11-02 23:12:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:07,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:09,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:09,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223348223] [2021-11-02 23:12:09,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223348223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:09,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331389786] [2021-11-02 23:12:09,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:12:09,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:09,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:09,226 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:09,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:12:11,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:12:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1888 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:12:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:12,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331389786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:12,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:12,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-02 23:12:12,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435224189] [2021-11-02 23:12:12,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 23:12:12,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 23:12:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:12:12,425 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 0 states have call successors, (0), 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 23:12:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:12,637 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-11-02 23:12:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-02 23:12:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 0 states have call successors, (0), 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 220 [2021-11-02 23:12:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:12,639 INFO L225 Difference]: With dead ends: 236 [2021-11-02 23:12:12,639 INFO L226 Difference]: Without dead ends: 229 [2021-11-02 23:12:12,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:12:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-02 23:12:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2021-11-02 23:12:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.008888888888889) internal successors, (227), 225 states have internal predecessors, (227), 0 states have call successors, (0), 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 23:12:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2021-11-02 23:12:12,646 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 220 [2021-11-02 23:12:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:12,646 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2021-11-02 23:12:12,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 0 states have call successors, (0), 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 23:12:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2021-11-02 23:12:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-02 23:12:12,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:12,649 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:12,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:12,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:12,863 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:12,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash 992668872, now seen corresponding path program 53 times [2021-11-02 23:12:12,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:12,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079563360] [2021-11-02 23:12:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:12,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:14,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:14,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079563360] [2021-11-02 23:12:14,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079563360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:14,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272560278] [2021-11-02 23:12:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:12:14,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:14,360 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:14,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 23:12:17,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2021-11-02 23:12:17,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:17,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 23:12:17,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:17,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272560278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:17,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:17,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-02 23:12:17,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500080850] [2021-11-02 23:12:17,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-02 23:12:17,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-02 23:12:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:12:17,788 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 58 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 58 states have internal predecessors, (229), 0 states have call successors, (0), 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 23:12:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:17,985 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2021-11-02 23:12:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 23:12:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 58 states have internal predecessors, (229), 0 states have call successors, (0), 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 224 [2021-11-02 23:12:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:17,987 INFO L225 Difference]: With dead ends: 240 [2021-11-02 23:12:17,987 INFO L226 Difference]: Without dead ends: 233 [2021-11-02 23:12:17,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:12:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-02 23:12:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2021-11-02 23:12:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0087336244541485) internal successors, (231), 229 states have internal predecessors, (231), 0 states have call successors, (0), 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 23:12:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2021-11-02 23:12:17,992 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 224 [2021-11-02 23:12:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:17,992 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2021-11-02 23:12:17,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 58 states have internal predecessors, (229), 0 states have call successors, (0), 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 23:12:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2021-11-02 23:12:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-02 23:12:17,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:17,994 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:18,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-02 23:12:18,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-02 23:12:18,194 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1485406863, now seen corresponding path program 54 times [2021-11-02 23:12:18,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:18,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729751775] [2021-11-02 23:12:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:18,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:19,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:19,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729751775] [2021-11-02 23:12:19,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729751775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:19,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883699863] [2021-11-02 23:12:19,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:12:19,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:19,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:19,836 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:19,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 23:12:22,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2021-11-02 23:12:22,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:12:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:23,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883699863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:23,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:23,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-11-02 23:12:23,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99561970] [2021-11-02 23:12:23,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-02 23:12:23,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-02 23:12:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:12:23,211 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand has 59 states, 59 states have (on average 3.9491525423728815) internal successors, (233), 59 states have internal predecessors, (233), 0 states have call successors, (0), 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 23:12:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:23,365 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2021-11-02 23:12:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 23:12:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.9491525423728815) internal successors, (233), 59 states have internal predecessors, (233), 0 states have call successors, (0), 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 228 [2021-11-02 23:12:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:23,367 INFO L225 Difference]: With dead ends: 244 [2021-11-02 23:12:23,367 INFO L226 Difference]: Without dead ends: 237 [2021-11-02 23:12:23,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:12:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-02 23:12:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2021-11-02 23:12:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0085836909871244) internal successors, (235), 233 states have internal predecessors, (235), 0 states have call successors, (0), 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 23:12:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2021-11-02 23:12:23,374 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 228 [2021-11-02 23:12:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:23,375 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2021-11-02 23:12:23,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.9491525423728815) internal successors, (233), 59 states have internal predecessors, (233), 0 states have call successors, (0), 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 23:12:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2021-11-02 23:12:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-02 23:12:23,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:23,377 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:23,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:23,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 23:12:23,587 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:23,587 INFO L85 PathProgramCache]: Analyzing trace with hash -712385322, now seen corresponding path program 55 times [2021-11-02 23:12:23,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:23,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89536493] [2021-11-02 23:12:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:23,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:24,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:24,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89536493] [2021-11-02 23:12:24,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89536493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:24,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55302480] [2021-11-02 23:12:24,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:12:24,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:24,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:24,854 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:24,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 23:12:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:27,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 23:12:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:27,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55302480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:27,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:27,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-02 23:12:27,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443610947] [2021-11-02 23:12:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-02 23:12:27,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-02 23:12:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:12:27,722 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand has 60 states, 60 states have (on average 3.95) internal successors, (237), 60 states have internal predecessors, (237), 0 states have call successors, (0), 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 23:12:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:27,907 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2021-11-02 23:12:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 23:12:27,907 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.95) internal successors, (237), 60 states have internal predecessors, (237), 0 states have call successors, (0), 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 232 [2021-11-02 23:12:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:27,909 INFO L225 Difference]: With dead ends: 248 [2021-11-02 23:12:27,909 INFO L226 Difference]: Without dead ends: 241 [2021-11-02 23:12:27,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:12:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-02 23:12:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2021-11-02 23:12:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.0084388185654007) internal successors, (239), 237 states have internal predecessors, (239), 0 states have call successors, (0), 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 23:12:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2021-11-02 23:12:27,918 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 232 [2021-11-02 23:12:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:27,919 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2021-11-02 23:12:27,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.95) internal successors, (237), 60 states have internal predecessors, (237), 0 states have call successors, (0), 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 23:12:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2021-11-02 23:12:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-02 23:12:27,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:27,922 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:27,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:28,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 23:12:28,147 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:28,147 INFO L85 PathProgramCache]: Analyzing trace with hash -894059619, now seen corresponding path program 56 times [2021-11-02 23:12:28,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:28,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51331035] [2021-11-02 23:12:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:28,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:29,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:29,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51331035] [2021-11-02 23:12:29,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51331035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:29,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515879987] [2021-11-02 23:12:29,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:12:29,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:29,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:29,557 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:29,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 23:12:31,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:12:31,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 2024 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:12:31,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:32,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515879987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:32,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:32,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-02 23:12:32,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675719494] [2021-11-02 23:12:32,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-02 23:12:32,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-02 23:12:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:12:32,604 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand has 61 states, 61 states have (on average 3.9508196721311477) internal successors, (241), 61 states have internal predecessors, (241), 0 states have call successors, (0), 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 23:12:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:32,791 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2021-11-02 23:12:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-02 23:12:32,792 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.9508196721311477) internal successors, (241), 61 states have internal predecessors, (241), 0 states have call successors, (0), 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 236 [2021-11-02 23:12:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:32,794 INFO L225 Difference]: With dead ends: 252 [2021-11-02 23:12:32,794 INFO L226 Difference]: Without dead ends: 245 [2021-11-02 23:12:32,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:12:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-02 23:12:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-11-02 23:12:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.008298755186722) internal successors, (243), 241 states have internal predecessors, (243), 0 states have call successors, (0), 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 23:12:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2021-11-02 23:12:32,803 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 236 [2021-11-02 23:12:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:32,803 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2021-11-02 23:12:32,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.9508196721311477) internal successors, (241), 61 states have internal predecessors, (241), 0 states have call successors, (0), 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 23:12:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2021-11-02 23:12:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-02 23:12:32,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:32,806 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:32,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:33,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:33,027 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:33,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:33,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1974918884, now seen corresponding path program 57 times [2021-11-02 23:12:33,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:33,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251194290] [2021-11-02 23:12:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:33,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251194290] [2021-11-02 23:12:34,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251194290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970322865] [2021-11-02 23:12:34,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:12:34,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:34,755 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:34,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 23:12:37,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2021-11-02 23:12:37,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:37,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 23:12:37,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:38,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970322865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:38,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:38,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-11-02 23:12:38,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499040280] [2021-11-02 23:12:38,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-02 23:12:38,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-02 23:12:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 23:12:38,123 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand has 62 states, 62 states have (on average 3.9516129032258065) internal successors, (245), 62 states have internal predecessors, (245), 0 states have call successors, (0), 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 23:12:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:38,275 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2021-11-02 23:12:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-02 23:12:38,276 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.9516129032258065) internal successors, (245), 62 states have internal predecessors, (245), 0 states have call successors, (0), 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 240 [2021-11-02 23:12:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:38,277 INFO L225 Difference]: With dead ends: 256 [2021-11-02 23:12:38,277 INFO L226 Difference]: Without dead ends: 249 [2021-11-02 23:12:38,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 23:12:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-02 23:12:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 246. [2021-11-02 23:12:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.0081632653061225) internal successors, (247), 245 states have internal predecessors, (247), 0 states have call successors, (0), 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 23:12:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2021-11-02 23:12:38,281 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 240 [2021-11-02 23:12:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:38,282 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2021-11-02 23:12:38,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.9516129032258065) internal successors, (245), 62 states have internal predecessors, (245), 0 states have call successors, (0), 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 23:12:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2021-11-02 23:12:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-02 23:12:38,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:38,285 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:38,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-02 23:12:38,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:38,499 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1453914453, now seen corresponding path program 58 times [2021-11-02 23:12:38,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:38,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124772068] [2021-11-02 23:12:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:38,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:39,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:39,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124772068] [2021-11-02 23:12:39,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124772068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:39,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398994602] [2021-11-02 23:12:39,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:12:39,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:39,993 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:39,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 23:12:42,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:12:42,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:42,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 23:12:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:43,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398994602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:43,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:43,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-02 23:12:43,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848765664] [2021-11-02 23:12:43,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-02 23:12:43,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-02 23:12:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:12:43,066 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand has 63 states, 63 states have (on average 3.9523809523809526) internal successors, (249), 63 states have internal predecessors, (249), 0 states have call successors, (0), 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 23:12:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:43,239 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-11-02 23:12:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-02 23:12:43,240 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9523809523809526) internal successors, (249), 63 states have internal predecessors, (249), 0 states have call successors, (0), 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 244 [2021-11-02 23:12:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:43,242 INFO L225 Difference]: With dead ends: 260 [2021-11-02 23:12:43,242 INFO L226 Difference]: Without dead ends: 253 [2021-11-02 23:12:43,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:12:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-02 23:12:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2021-11-02 23:12:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 249 states have internal predecessors, (251), 0 states have call successors, (0), 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 23:12:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2021-11-02 23:12:43,250 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 244 [2021-11-02 23:12:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:43,251 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2021-11-02 23:12:43,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9523809523809526) internal successors, (249), 63 states have internal predecessors, (249), 0 states have call successors, (0), 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 23:12:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2021-11-02 23:12:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-02 23:12:43,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:43,253 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:43,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:43,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:43,479 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:43,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:43,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1031795442, now seen corresponding path program 59 times [2021-11-02 23:12:43,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:43,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007894360] [2021-11-02 23:12:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:43,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:44,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:44,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007894360] [2021-11-02 23:12:44,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007894360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:44,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442395595] [2021-11-02 23:12:44,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:12:44,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:44,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:44,891 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:44,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 23:12:47,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2021-11-02 23:12:47,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:47,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 23:12:47,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:48,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442395595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:48,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:48,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-02 23:12:48,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207560819] [2021-11-02 23:12:48,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-02 23:12:48,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:48,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-02 23:12:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 23:12:48,198 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 64 states, 64 states have (on average 3.953125) internal successors, (253), 64 states have internal predecessors, (253), 0 states have call successors, (0), 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 23:12:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:48,356 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2021-11-02 23:12:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-02 23:12:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.953125) internal successors, (253), 64 states have internal predecessors, (253), 0 states have call successors, (0), 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 248 [2021-11-02 23:12:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:48,358 INFO L225 Difference]: With dead ends: 264 [2021-11-02 23:12:48,358 INFO L226 Difference]: Without dead ends: 257 [2021-11-02 23:12:48,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 23:12:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-02 23:12:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2021-11-02 23:12:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.007905138339921) internal successors, (255), 253 states have internal predecessors, (255), 0 states have call successors, (0), 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 23:12:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2021-11-02 23:12:48,364 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 248 [2021-11-02 23:12:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:48,365 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2021-11-02 23:12:48,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.953125) internal successors, (253), 64 states have internal predecessors, (253), 0 states have call successors, (0), 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 23:12:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2021-11-02 23:12:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-02 23:12:48,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:48,367 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:48,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:48,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:48,591 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2134598585, now seen corresponding path program 60 times [2021-11-02 23:12:48,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:48,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389060040] [2021-11-02 23:12:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:48,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:50,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:50,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389060040] [2021-11-02 23:12:50,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389060040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:50,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099131261] [2021-11-02 23:12:50,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:12:50,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:50,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:50,085 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:50,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-02 23:12:53,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2021-11-02 23:12:53,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:53,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-02 23:12:53,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:53,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099131261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:53,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:53,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-11-02 23:12:53,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521619282] [2021-11-02 23:12:53,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-02 23:12:53,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-02 23:12:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-02 23:12:53,925 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 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 23:12:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:54,129 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2021-11-02 23:12:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-02 23:12:54,129 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 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 252 [2021-11-02 23:12:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:54,131 INFO L225 Difference]: With dead ends: 268 [2021-11-02 23:12:54,131 INFO L226 Difference]: Without dead ends: 261 [2021-11-02 23:12:54,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-02 23:12:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-02 23:12:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2021-11-02 23:12:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 257 states have internal predecessors, (259), 0 states have call successors, (0), 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 23:12:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2021-11-02 23:12:54,139 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 252 [2021-11-02 23:12:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:54,139 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2021-11-02 23:12:54,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 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 23:12:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2021-11-02 23:12:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-02 23:12:54,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:54,142 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:54,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:54,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-02 23:12:54,355 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:54,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1598875392, now seen corresponding path program 61 times [2021-11-02 23:12:54,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:54,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939347639] [2021-11-02 23:12:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:54,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:56,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:56,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939347639] [2021-11-02 23:12:56,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939347639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:56,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588224097] [2021-11-02 23:12:56,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:12:56,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:56,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:56,144 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:56,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-02 23:12:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 23:12:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:59,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588224097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:59,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:59,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-02 23:12:59,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568943412] [2021-11-02 23:12:59,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 23:12:59,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 23:12:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:12:59,498 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 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 23:12:59,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:59,689 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2021-11-02 23:12:59,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-02 23:12:59,689 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 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 256 [2021-11-02 23:12:59,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:59,691 INFO L225 Difference]: With dead ends: 272 [2021-11-02 23:12:59,691 INFO L226 Difference]: Without dead ends: 265 [2021-11-02 23:12:59,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:12:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-02 23:12:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2021-11-02 23:12:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0076628352490422) internal successors, (263), 261 states have internal predecessors, (263), 0 states have call successors, (0), 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 23:12:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2021-11-02 23:12:59,697 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 256 [2021-11-02 23:12:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:59,698 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2021-11-02 23:12:59,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 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 23:12:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2021-11-02 23:12:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-02 23:12:59,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:59,701 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:59,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:59,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:59,927 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash 691065543, now seen corresponding path program 62 times [2021-11-02 23:12:59,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:59,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266117024] [2021-11-02 23:12:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:59,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:02,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:02,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266117024] [2021-11-02 23:13:02,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266117024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:02,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080797928] [2021-11-02 23:13:02,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:02,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:02,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:02,193 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:02,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-02 23:13:05,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:05,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 2228 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-02 23:13:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:06,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080797928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:06,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:06,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-02 23:13:06,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512458221] [2021-11-02 23:13:06,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-02 23:13:06,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-02 23:13:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:13:06,070 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 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 23:13:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:06,268 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2021-11-02 23:13:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-02 23:13:06,268 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 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 260 [2021-11-02 23:13:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:06,270 INFO L225 Difference]: With dead ends: 276 [2021-11-02 23:13:06,270 INFO L226 Difference]: Without dead ends: 269 [2021-11-02 23:13:06,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:13:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-02 23:13:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 266. [2021-11-02 23:13:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0075471698113208) internal successors, (267), 265 states have internal predecessors, (267), 0 states have call successors, (0), 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 23:13:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2021-11-02 23:13:06,277 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 260 [2021-11-02 23:13:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:06,278 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2021-11-02 23:13:06,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 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 23:13:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2021-11-02 23:13:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-02 23:13:06,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:06,280 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:06,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:06,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-02 23:13:06,502 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:06,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1696485646, now seen corresponding path program 63 times [2021-11-02 23:13:06,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:06,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681411211] [2021-11-02 23:13:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:06,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:08,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:08,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681411211] [2021-11-02 23:13:08,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681411211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:08,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861601008] [2021-11-02 23:13:08,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:08,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:08,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:08,198 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:08,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-02 23:13:11,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2021-11-02 23:13:11,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2262 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-02 23:13:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:12,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861601008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:12,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:12,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-11-02 23:13:12,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085466819] [2021-11-02 23:13:12,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 23:13:12,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 23:13:12,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:13:12,453 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand has 68 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 68 states have internal predecessors, (269), 0 states have call successors, (0), 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 23:13:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:12,652 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2021-11-02 23:13:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-02 23:13:12,652 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 68 states have internal predecessors, (269), 0 states have call successors, (0), 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 264 [2021-11-02 23:13:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:12,654 INFO L225 Difference]: With dead ends: 280 [2021-11-02 23:13:12,654 INFO L226 Difference]: Without dead ends: 273 [2021-11-02 23:13:12,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:13:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-02 23:13:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2021-11-02 23:13:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0074349442379182) internal successors, (271), 269 states have internal predecessors, (271), 0 states have call successors, (0), 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 23:13:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2021-11-02 23:13:12,660 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 264 [2021-11-02 23:13:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:12,660 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2021-11-02 23:13:12,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 68 states have internal predecessors, (269), 0 states have call successors, (0), 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 23:13:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2021-11-02 23:13:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-02 23:13:12,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:12,663 INFO L513 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:12,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-02 23:13:12,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-02 23:13:12,879 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash -704293931, now seen corresponding path program 64 times [2021-11-02 23:13:12,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:12,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32879463] [2021-11-02 23:13:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:12,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:14,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:14,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32879463] [2021-11-02 23:13:14,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32879463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:14,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480077761] [2021-11-02 23:13:14,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:13:14,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:14,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:14,558 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:14,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-02 23:13:17,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:13:17,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2296 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-02 23:13:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:18,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480077761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:18,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:18,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-02 23:13:18,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015227803] [2021-11-02 23:13:18,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-02 23:13:18,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-02 23:13:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:13:18,730 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand has 69 states, 69 states have (on average 3.9565217391304346) internal successors, (273), 69 states have internal predecessors, (273), 0 states have call successors, (0), 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 23:13:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:18,940 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2021-11-02 23:13:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 23:13:18,940 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.9565217391304346) internal successors, (273), 69 states have internal predecessors, (273), 0 states have call successors, (0), 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 268 [2021-11-02 23:13:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:18,942 INFO L225 Difference]: With dead ends: 284 [2021-11-02 23:13:18,942 INFO L226 Difference]: Without dead ends: 277 [2021-11-02 23:13:18,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:13:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-02 23:13:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2021-11-02 23:13:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.0073260073260073) internal successors, (275), 273 states have internal predecessors, (275), 0 states have call successors, (0), 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 23:13:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2021-11-02 23:13:18,947 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 268 [2021-11-02 23:13:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:18,948 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2021-11-02 23:13:18,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.9565217391304346) internal successors, (273), 69 states have internal predecessors, (273), 0 states have call successors, (0), 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 23:13:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2021-11-02 23:13:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-02 23:13:18,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:18,953 INFO L513 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:18,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:19,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:19,159 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1567646948, now seen corresponding path program 65 times [2021-11-02 23:13:19,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:19,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261159686] [2021-11-02 23:13:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:19,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:21,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:21,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261159686] [2021-11-02 23:13:21,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261159686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:21,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140793073] [2021-11-02 23:13:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:13:21,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:21,187 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:21,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-02 23:13:24,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2021-11-02 23:13:24,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2330 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-02 23:13:24,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:25,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140793073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:25,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:25,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-02 23:13:25,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350495816] [2021-11-02 23:13:25,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-02 23:13:25,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-02 23:13:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 23:13:25,283 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand has 70 states, 70 states have (on average 3.9571428571428573) internal successors, (277), 70 states have internal predecessors, (277), 0 states have call successors, (0), 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 23:13:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:25,510 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2021-11-02 23:13:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 23:13:25,511 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.9571428571428573) internal successors, (277), 70 states have internal predecessors, (277), 0 states have call successors, (0), 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 272 [2021-11-02 23:13:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:25,512 INFO L225 Difference]: With dead ends: 288 [2021-11-02 23:13:25,513 INFO L226 Difference]: Without dead ends: 281 [2021-11-02 23:13:25,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 23:13:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-02 23:13:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2021-11-02 23:13:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.0072202166064983) internal successors, (279), 277 states have internal predecessors, (279), 0 states have call successors, (0), 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 23:13:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 279 transitions. [2021-11-02 23:13:25,518 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 279 transitions. Word has length 272 [2021-11-02 23:13:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:25,518 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 279 transitions. [2021-11-02 23:13:25,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.9571428571428573) internal successors, (277), 70 states have internal predecessors, (277), 0 states have call successors, (0), 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 23:13:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 279 transitions. [2021-11-02 23:13:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-02 23:13:25,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:25,520 INFO L513 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:25,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:25,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-02 23:13:25,721 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash 109504227, now seen corresponding path program 66 times [2021-11-02 23:13:25,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:25,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682258441] [2021-11-02 23:13:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:25,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:27,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:27,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682258441] [2021-11-02 23:13:27,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682258441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:27,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888078584] [2021-11-02 23:13:27,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:13:27,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:27,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:27,849 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:27,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-02 23:13:31,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2021-11-02 23:13:31,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:31,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-02 23:13:31,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:32,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888078584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:32,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:32,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-11-02 23:13:32,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082336855] [2021-11-02 23:13:32,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-02 23:13:32,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-02 23:13:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 23:13:32,728 INFO L87 Difference]: Start difference. First operand 278 states and 279 transitions. Second operand has 71 states, 71 states have (on average 3.9577464788732395) internal successors, (281), 71 states have internal predecessors, (281), 0 states have call successors, (0), 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 23:13:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:33,008 INFO L93 Difference]: Finished difference Result 292 states and 294 transitions. [2021-11-02 23:13:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-02 23:13:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.9577464788732395) internal successors, (281), 71 states have internal predecessors, (281), 0 states have call successors, (0), 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 276 [2021-11-02 23:13:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:33,011 INFO L225 Difference]: With dead ends: 292 [2021-11-02 23:13:33,011 INFO L226 Difference]: Without dead ends: 285 [2021-11-02 23:13:33,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 23:13:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-02 23:13:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2021-11-02 23:13:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.00711743772242) internal successors, (283), 281 states have internal predecessors, (283), 0 states have call successors, (0), 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 23:13:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2021-11-02 23:13:33,021 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 276 [2021-11-02 23:13:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:33,021 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2021-11-02 23:13:33,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.9577464788732395) internal successors, (281), 71 states have internal predecessors, (281), 0 states have call successors, (0), 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 23:13:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2021-11-02 23:13:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-02 23:13:33,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:33,024 INFO L513 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:33,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:33,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-02 23:13:33,239 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1026230486, now seen corresponding path program 67 times [2021-11-02 23:13:33,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:33,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540659247] [2021-11-02 23:13:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:33,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:35,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:35,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540659247] [2021-11-02 23:13:35,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540659247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:35,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543316684] [2021-11-02 23:13:35,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:13:35,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:35,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:35,494 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:35,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-02 23:13:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:39,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2398 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-02 23:13:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:40,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543316684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:40,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:40,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-02 23:13:40,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650000297] [2021-11-02 23:13:40,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-02 23:13:40,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:40,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-02 23:13:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 23:13:40,248 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand has 72 states, 72 states have (on average 3.9583333333333335) internal successors, (285), 72 states have internal predecessors, (285), 0 states have call successors, (0), 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 23:13:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:40,539 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2021-11-02 23:13:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-02 23:13:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9583333333333335) internal successors, (285), 72 states have internal predecessors, (285), 0 states have call successors, (0), 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 280 [2021-11-02 23:13:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:40,541 INFO L225 Difference]: With dead ends: 296 [2021-11-02 23:13:40,542 INFO L226 Difference]: Without dead ends: 289 [2021-11-02 23:13:40,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 23:13:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-02 23:13:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2021-11-02 23:13:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.0070175438596491) internal successors, (287), 285 states have internal predecessors, (287), 0 states have call successors, (0), 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 23:13:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2021-11-02 23:13:40,552 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 280 [2021-11-02 23:13:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:40,552 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2021-11-02 23:13:40,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9583333333333335) internal successors, (285), 72 states have internal predecessors, (285), 0 states have call successors, (0), 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 23:13:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2021-11-02 23:13:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-02 23:13:40,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:40,556 INFO L513 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:40,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-02 23:13:40,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:40,783 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:40,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1920758799, now seen corresponding path program 68 times [2021-11-02 23:13:40,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:40,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206249813] [2021-11-02 23:13:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:40,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:43,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:43,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206249813] [2021-11-02 23:13:43,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206249813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:43,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590959687] [2021-11-02 23:13:43,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:43,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:43,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:43,090 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:43,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-02 23:13:47,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:47,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:47,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-02 23:13:47,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:48,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590959687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:48,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:48,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-11-02 23:13:48,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143435881] [2021-11-02 23:13:48,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-02 23:13:48,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-02 23:13:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-02 23:13:48,090 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand has 73 states, 73 states have (on average 3.958904109589041) internal successors, (289), 73 states have internal predecessors, (289), 0 states have call successors, (0), 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 23:13:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:48,325 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2021-11-02 23:13:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-02 23:13:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.958904109589041) internal successors, (289), 73 states have internal predecessors, (289), 0 states have call successors, (0), 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 284 [2021-11-02 23:13:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:48,327 INFO L225 Difference]: With dead ends: 300 [2021-11-02 23:13:48,327 INFO L226 Difference]: Without dead ends: 293 [2021-11-02 23:13:48,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-02 23:13:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-02 23:13:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2021-11-02 23:13:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0069204152249136) internal successors, (291), 289 states have internal predecessors, (291), 0 states have call successors, (0), 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 23:13:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 291 transitions. [2021-11-02 23:13:48,333 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 291 transitions. Word has length 284 [2021-11-02 23:13:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:48,333 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 291 transitions. [2021-11-02 23:13:48,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.958904109589041) internal successors, (289), 73 states have internal predecessors, (289), 0 states have call successors, (0), 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 23:13:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 291 transitions. [2021-11-02 23:13:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-02 23:13:48,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:48,335 INFO L513 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:48,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-02 23:13:48,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:48,539 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2118359752, now seen corresponding path program 69 times [2021-11-02 23:13:48,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:48,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846279851] [2021-11-02 23:13:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:48,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:50,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:50,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846279851] [2021-11-02 23:13:50,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846279851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:50,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040414599] [2021-11-02 23:13:50,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:50,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:50,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:50,844 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:50,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-02 23:13:55,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2021-11-02 23:13:55,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2466 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-02 23:13:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:56,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040414599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:56,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:56,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-11-02 23:13:56,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943526824] [2021-11-02 23:13:56,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-02 23:13:56,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:56,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-02 23:13:56,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-11-02 23:13:56,237 INFO L87 Difference]: Start difference. First operand 290 states and 291 transitions. Second operand has 74 states, 74 states have (on average 3.9594594594594597) internal successors, (293), 74 states have internal predecessors, (293), 0 states have call successors, (0), 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 23:13:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:56,481 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2021-11-02 23:13:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-02 23:13:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.9594594594594597) internal successors, (293), 74 states have internal predecessors, (293), 0 states have call successors, (0), 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 288 [2021-11-02 23:13:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:56,483 INFO L225 Difference]: With dead ends: 304 [2021-11-02 23:13:56,483 INFO L226 Difference]: Without dead ends: 297 [2021-11-02 23:13:56,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-11-02 23:13:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-02 23:13:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2021-11-02 23:13:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.006825938566553) internal successors, (295), 293 states have internal predecessors, (295), 0 states have call successors, (0), 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 23:13:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2021-11-02 23:13:56,490 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 288 [2021-11-02 23:13:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:56,491 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2021-11-02 23:13:56,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.9594594594594597) internal successors, (293), 74 states have internal predecessors, (293), 0 states have call successors, (0), 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 23:13:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2021-11-02 23:13:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-02 23:13:56,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:56,494 INFO L513 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:56,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-02 23:13:56,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-11-02 23:13:56,702 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:56,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1882635521, now seen corresponding path program 70 times [2021-11-02 23:13:56,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:56,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575927613] [2021-11-02 23:13:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:56,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:59,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:59,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575927613] [2021-11-02 23:13:59,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575927613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:59,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657313199] [2021-11-02 23:13:59,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:13:59,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:59,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:59,121 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:59,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-02 23:14:03,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:14:03,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:03,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-02 23:14:03,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:04,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657313199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:04,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:04,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-11-02 23:14:04,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693153496] [2021-11-02 23:14:04,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-02 23:14:04,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:04,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-02 23:14:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 23:14:04,343 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand has 75 states, 75 states have (on average 3.96) internal successors, (297), 75 states have internal predecessors, (297), 0 states have call successors, (0), 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 23:14:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:04,591 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2021-11-02 23:14:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-02 23:14:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.96) internal successors, (297), 75 states have internal predecessors, (297), 0 states have call successors, (0), 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 292 [2021-11-02 23:14:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:04,593 INFO L225 Difference]: With dead ends: 308 [2021-11-02 23:14:04,593 INFO L226 Difference]: Without dead ends: 301 [2021-11-02 23:14:04,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 23:14:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-02 23:14:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2021-11-02 23:14:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.0067340067340067) internal successors, (299), 297 states have internal predecessors, (299), 0 states have call successors, (0), 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 23:14:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2021-11-02 23:14:04,602 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 292 [2021-11-02 23:14:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:04,602 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2021-11-02 23:14:04,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.96) internal successors, (297), 75 states have internal predecessors, (297), 0 states have call successors, (0), 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 23:14:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2021-11-02 23:14:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-02 23:14:04,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:04,605 INFO L513 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:04,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:04,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:04,831 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash -317463226, now seen corresponding path program 71 times [2021-11-02 23:14:04,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:04,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906946784] [2021-11-02 23:14:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:04,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:07,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:07,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906946784] [2021-11-02 23:14:07,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906946784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:07,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281987455] [2021-11-02 23:14:07,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:14:07,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:07,397 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:07,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-02 23:14:12,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2021-11-02 23:14:12,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-02 23:14:12,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:13,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281987455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:13,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:13,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-11-02 23:14:13,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847699829] [2021-11-02 23:14:13,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-02 23:14:13,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:13,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-02 23:14:13,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 23:14:13,017 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand has 76 states, 76 states have (on average 3.960526315789474) internal successors, (301), 76 states have internal predecessors, (301), 0 states have call successors, (0), 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 23:14:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:13,284 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2021-11-02 23:14:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-02 23:14:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.960526315789474) internal successors, (301), 76 states have internal predecessors, (301), 0 states have call successors, (0), 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 296 [2021-11-02 23:14:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:13,286 INFO L225 Difference]: With dead ends: 312 [2021-11-02 23:14:13,286 INFO L226 Difference]: Without dead ends: 305 [2021-11-02 23:14:13,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 23:14:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-02 23:14:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2021-11-02 23:14:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.0066445182724253) internal successors, (303), 301 states have internal predecessors, (303), 0 states have call successors, (0), 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 23:14:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 303 transitions. [2021-11-02 23:14:13,294 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 303 transitions. Word has length 296 [2021-11-02 23:14:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:13,295 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 303 transitions. [2021-11-02 23:14:13,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.960526315789474) internal successors, (301), 76 states have internal predecessors, (301), 0 states have call successors, (0), 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 23:14:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 303 transitions. [2021-11-02 23:14:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-02 23:14:13,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:13,298 INFO L513 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:13,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:13,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:13,523 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2077881331, now seen corresponding path program 72 times [2021-11-02 23:14:13,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:13,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056294333] [2021-11-02 23:14:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:13,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:16,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056294333] [2021-11-02 23:14:16,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056294333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555639290] [2021-11-02 23:14:16,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:14:16,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:16,649 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:16,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-02 23:14:21,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2021-11-02 23:14:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-02 23:14:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:22,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555639290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:22,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:22,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-11-02 23:14:22,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872903107] [2021-11-02 23:14:22,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-02 23:14:22,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:22,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-02 23:14:22,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:14:22,504 INFO L87 Difference]: Start difference. First operand 302 states and 303 transitions. Second operand has 77 states, 77 states have (on average 3.961038961038961) internal successors, (305), 77 states have internal predecessors, (305), 0 states have call successors, (0), 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 23:14:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:22,765 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2021-11-02 23:14:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-02 23:14:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.961038961038961) internal successors, (305), 77 states have internal predecessors, (305), 0 states have call successors, (0), 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 300 [2021-11-02 23:14:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:22,768 INFO L225 Difference]: With dead ends: 316 [2021-11-02 23:14:22,768 INFO L226 Difference]: Without dead ends: 309 [2021-11-02 23:14:22,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:14:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-02 23:14:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 306. [2021-11-02 23:14:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0065573770491802) internal successors, (307), 305 states have internal predecessors, (307), 0 states have call successors, (0), 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 23:14:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 307 transitions. [2021-11-02 23:14:22,774 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 307 transitions. Word has length 300 [2021-11-02 23:14:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:22,774 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 307 transitions. [2021-11-02 23:14:22,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.961038961038961) internal successors, (305), 77 states have internal predecessors, (305), 0 states have call successors, (0), 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 23:14:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 307 transitions. [2021-11-02 23:14:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-02 23:14:22,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:22,776 INFO L513 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:22,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-02 23:14:22,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:22,977 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1688827732, now seen corresponding path program 73 times [2021-11-02 23:14:22,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:22,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891739238] [2021-11-02 23:14:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:22,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:25,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:25,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891739238] [2021-11-02 23:14:25,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891739238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:25,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278154351] [2021-11-02 23:14:25,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:14:25,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:25,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:25,735 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:25,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-02 23:14:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-02 23:14:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:31,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278154351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:31,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:31,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-02 23:14:31,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328473623] [2021-11-02 23:14:31,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-02 23:14:31,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-02 23:14:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 23:14:31,163 INFO L87 Difference]: Start difference. First operand 306 states and 307 transitions. Second operand has 78 states, 78 states have (on average 3.9615384615384617) internal successors, (309), 78 states have internal predecessors, (309), 0 states have call successors, (0), 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 23:14:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:31,497 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2021-11-02 23:14:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-02 23:14:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.9615384615384617) internal successors, (309), 78 states have internal predecessors, (309), 0 states have call successors, (0), 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 304 [2021-11-02 23:14:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:31,501 INFO L225 Difference]: With dead ends: 320 [2021-11-02 23:14:31,501 INFO L226 Difference]: Without dead ends: 313 [2021-11-02 23:14:31,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 23:14:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-02 23:14:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2021-11-02 23:14:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.006472491909385) internal successors, (311), 309 states have internal predecessors, (311), 0 states have call successors, (0), 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 23:14:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2021-11-02 23:14:31,507 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 304 [2021-11-02 23:14:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:31,507 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2021-11-02 23:14:31,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.9615384615384617) internal successors, (309), 78 states have internal predecessors, (309), 0 states have call successors, (0), 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 23:14:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2021-11-02 23:14:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-02 23:14:31,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:31,509 INFO L513 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:31,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:31,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:31,709 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash 862447387, now seen corresponding path program 74 times [2021-11-02 23:14:31,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:31,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027428663] [2021-11-02 23:14:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:31,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:34,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:34,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027428663] [2021-11-02 23:14:34,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027428663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:34,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108448982] [2021-11-02 23:14:34,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:14:34,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:34,272 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:34,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-02 23:14:38,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:14:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-02 23:14:38,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:39,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108448982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:39,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:39,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-11-02 23:14:39,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008066985] [2021-11-02 23:14:39,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-02 23:14:39,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-02 23:14:39,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 23:14:39,898 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand has 79 states, 79 states have (on average 3.962025316455696) internal successors, (313), 79 states have internal predecessors, (313), 0 states have call successors, (0), 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 23:14:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:40,168 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2021-11-02 23:14:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-02 23:14:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.962025316455696) internal successors, (313), 79 states have internal predecessors, (313), 0 states have call successors, (0), 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 308 [2021-11-02 23:14:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:40,170 INFO L225 Difference]: With dead ends: 324 [2021-11-02 23:14:40,170 INFO L226 Difference]: Without dead ends: 317 [2021-11-02 23:14:40,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 23:14:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-02 23:14:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2021-11-02 23:14:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.0063897763578276) internal successors, (315), 313 states have internal predecessors, (315), 0 states have call successors, (0), 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 23:14:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 315 transitions. [2021-11-02 23:14:40,177 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 315 transitions. Word has length 308 [2021-11-02 23:14:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:40,177 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 315 transitions. [2021-11-02 23:14:40,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.962025316455696) internal successors, (313), 79 states have internal predecessors, (313), 0 states have call successors, (0), 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 23:14:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 315 transitions. [2021-11-02 23:14:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-02 23:14:40,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:40,180 INFO L513 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:40,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:40,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:40,387 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1706353822, now seen corresponding path program 75 times [2021-11-02 23:14:40,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:40,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707885899] [2021-11-02 23:14:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:40,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:43,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:43,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707885899] [2021-11-02 23:14:43,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707885899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:43,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862719432] [2021-11-02 23:14:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:14:43,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:43,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:43,144 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:43,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-02 23:14:48,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2021-11-02 23:14:48,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-02 23:14:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:49,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862719432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:49,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:49,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-11-02 23:14:49,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220041176] [2021-11-02 23:14:49,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-02 23:14:49,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-02 23:14:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-11-02 23:14:49,321 INFO L87 Difference]: Start difference. First operand 314 states and 315 transitions. Second operand has 80 states, 80 states have (on average 3.9625) internal successors, (317), 80 states have internal predecessors, (317), 0 states have call successors, (0), 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 23:14:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:49,611 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2021-11-02 23:14:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-02 23:14:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.9625) internal successors, (317), 80 states have internal predecessors, (317), 0 states have call successors, (0), 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 312 [2021-11-02 23:14:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:49,614 INFO L225 Difference]: With dead ends: 328 [2021-11-02 23:14:49,614 INFO L226 Difference]: Without dead ends: 321 [2021-11-02 23:14:49,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-11-02 23:14:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-02 23:14:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2021-11-02 23:14:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.0063091482649842) internal successors, (319), 317 states have internal predecessors, (319), 0 states have call successors, (0), 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 23:14:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 319 transitions. [2021-11-02 23:14:49,621 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 319 transitions. Word has length 312 [2021-11-02 23:14:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:49,621 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 319 transitions. [2021-11-02 23:14:49,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.9625) internal successors, (317), 80 states have internal predecessors, (317), 0 states have call successors, (0), 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 23:14:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 319 transitions. [2021-11-02 23:14:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-02 23:14:49,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:49,623 INFO L513 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:49,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-11-02 23:14:49,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-02 23:14:49,824 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1201875927, now seen corresponding path program 76 times [2021-11-02 23:14:49,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:49,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220148307] [2021-11-02 23:14:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:49,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:52,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:52,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220148307] [2021-11-02 23:14:52,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220148307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:52,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113508633] [2021-11-02 23:14:52,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:14:52,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:52,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:52,661 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:52,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-02 23:14:57,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:14:57,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-02 23:14:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:58,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113508633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:58,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:58,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-11-02 23:14:58,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386130258] [2021-11-02 23:14:58,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-02 23:14:58,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-02 23:14:58,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-02 23:14:58,561 INFO L87 Difference]: Start difference. First operand 318 states and 319 transitions. Second operand has 81 states, 81 states have (on average 3.962962962962963) internal successors, (321), 81 states have internal predecessors, (321), 0 states have call successors, (0), 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 23:14:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:58,870 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2021-11-02 23:14:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-02 23:14:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.962962962962963) internal successors, (321), 81 states have internal predecessors, (321), 0 states have call successors, (0), 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 316 [2021-11-02 23:14:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:58,873 INFO L225 Difference]: With dead ends: 332 [2021-11-02 23:14:58,874 INFO L226 Difference]: Without dead ends: 325 [2021-11-02 23:14:58,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-02 23:14:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-02 23:14:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2021-11-02 23:14:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.0062305295950156) internal successors, (323), 321 states have internal predecessors, (323), 0 states have call successors, (0), 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 23:14:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2021-11-02 23:14:58,884 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 316 [2021-11-02 23:14:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:58,885 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2021-11-02 23:14:58,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.962962962962963) internal successors, (321), 81 states have internal predecessors, (321), 0 states have call successors, (0), 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 23:14:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2021-11-02 23:14:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-02 23:14:58,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:58,888 INFO L513 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:58,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:59,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-02 23:14:59,115 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:59,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1849241232, now seen corresponding path program 77 times [2021-11-02 23:14:59,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:59,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302261413] [2021-11-02 23:14:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:59,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:01,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:01,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302261413] [2021-11-02 23:15:01,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302261413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:01,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794437179] [2021-11-02 23:15:01,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:15:01,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:01,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:01,815 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:01,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-02 23:15:06,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2021-11-02 23:15:06,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-02 23:15:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:07,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794437179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:07,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:07,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-11-02 23:15:07,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723998492] [2021-11-02 23:15:07,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-02 23:15:07,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-02 23:15:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-02 23:15:07,965 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand has 82 states, 82 states have (on average 3.9634146341463414) internal successors, (325), 82 states have internal predecessors, (325), 0 states have call successors, (0), 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 23:15:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:08,370 INFO L93 Difference]: Finished difference Result 336 states and 338 transitions. [2021-11-02 23:15:08,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-02 23:15:08,371 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.9634146341463414) internal successors, (325), 82 states have internal predecessors, (325), 0 states have call successors, (0), 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 320 [2021-11-02 23:15:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:08,373 INFO L225 Difference]: With dead ends: 336 [2021-11-02 23:15:08,374 INFO L226 Difference]: Without dead ends: 329 [2021-11-02 23:15:08,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-02 23:15:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-02 23:15:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2021-11-02 23:15:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.0061538461538462) internal successors, (327), 325 states have internal predecessors, (327), 0 states have call successors, (0), 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 23:15:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 327 transitions. [2021-11-02 23:15:08,384 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 327 transitions. Word has length 320 [2021-11-02 23:15:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:08,384 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 327 transitions. [2021-11-02 23:15:08,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.9634146341463414) internal successors, (325), 82 states have internal predecessors, (325), 0 states have call successors, (0), 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 23:15:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 327 transitions. [2021-11-02 23:15:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-02 23:15:08,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:08,387 INFO L513 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:08,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-02 23:15:08,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:08,603 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:08,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2144523063, now seen corresponding path program 78 times [2021-11-02 23:15:08,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:08,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475136837] [2021-11-02 23:15:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:08,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:11,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:11,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475136837] [2021-11-02 23:15:11,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475136837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:11,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307016215] [2021-11-02 23:15:11,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:15:11,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:11,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:11,561 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:11,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-02 23:15:17,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2021-11-02 23:15:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:17,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-02 23:15:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:18,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307016215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:18,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:18,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-11-02 23:15:18,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947158351] [2021-11-02 23:15:18,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-02 23:15:18,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-02 23:15:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-11-02 23:15:18,185 INFO L87 Difference]: Start difference. First operand 326 states and 327 transitions. Second operand has 83 states, 83 states have (on average 3.963855421686747) internal successors, (329), 83 states have internal predecessors, (329), 0 states have call successors, (0), 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 23:15:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:18,489 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2021-11-02 23:15:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-02 23:15:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.963855421686747) internal successors, (329), 83 states have internal predecessors, (329), 0 states have call successors, (0), 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 324 [2021-11-02 23:15:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:18,491 INFO L225 Difference]: With dead ends: 340 [2021-11-02 23:15:18,491 INFO L226 Difference]: Without dead ends: 333 [2021-11-02 23:15:18,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-11-02 23:15:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-02 23:15:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2021-11-02 23:15:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.006079027355623) internal successors, (331), 329 states have internal predecessors, (331), 0 states have call successors, (0), 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 23:15:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2021-11-02 23:15:18,498 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 324 [2021-11-02 23:15:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:18,498 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2021-11-02 23:15:18,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.963855421686747) internal successors, (329), 83 states have internal predecessors, (329), 0 states have call successors, (0), 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 23:15:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2021-11-02 23:15:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-02 23:15:18,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:18,500 INFO L513 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:18,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-02 23:15:18,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:18,701 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:18,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1595238018, now seen corresponding path program 79 times [2021-11-02 23:15:18,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:18,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281614472] [2021-11-02 23:15:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:18,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:21,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:21,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281614472] [2021-11-02 23:15:21,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281614472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:21,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293758002] [2021-11-02 23:15:21,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:15:21,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:21,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:21,736 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:21,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-02 23:15:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:27,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-02 23:15:27,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:28,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293758002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:28,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:28,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-02 23:15:28,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675399034] [2021-11-02 23:15:28,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-02 23:15:28,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-02 23:15:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 23:15:28,125 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand has 84 states, 84 states have (on average 3.9642857142857144) internal successors, (333), 84 states have internal predecessors, (333), 0 states have call successors, (0), 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 23:15:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:28,443 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2021-11-02 23:15:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-02 23:15:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.9642857142857144) internal successors, (333), 84 states have internal predecessors, (333), 0 states have call successors, (0), 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 328 [2021-11-02 23:15:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:28,445 INFO L225 Difference]: With dead ends: 344 [2021-11-02 23:15:28,446 INFO L226 Difference]: Without dead ends: 337 [2021-11-02 23:15:28,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 23:15:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-02 23:15:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2021-11-02 23:15:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.006006006006006) internal successors, (335), 333 states have internal predecessors, (335), 0 states have call successors, (0), 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 23:15:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2021-11-02 23:15:28,452 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 328 [2021-11-02 23:15:28,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:28,453 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2021-11-02 23:15:28,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.9642857142857144) internal successors, (333), 84 states have internal predecessors, (333), 0 states have call successors, (0), 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 23:15:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2021-11-02 23:15:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-02 23:15:28,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:28,455 INFO L513 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:28,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:28,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:28,656 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:28,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1217913925, now seen corresponding path program 80 times [2021-11-02 23:15:28,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:28,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115295032] [2021-11-02 23:15:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:28,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:31,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115295032] [2021-11-02 23:15:31,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115295032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130838428] [2021-11-02 23:15:31,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:15:31,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:31,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:31,360 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:31,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-02 23:15:36,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:15:36,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:36,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 2840 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-02 23:15:36,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:37,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130838428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:37,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:37,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-11-02 23:15:37,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319867751] [2021-11-02 23:15:37,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-02 23:15:37,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-02 23:15:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:15:37,872 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand has 85 states, 85 states have (on average 3.9647058823529413) internal successors, (337), 85 states have internal predecessors, (337), 0 states have call successors, (0), 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 23:15:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:38,175 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2021-11-02 23:15:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-02 23:15:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.9647058823529413) internal successors, (337), 85 states have internal predecessors, (337), 0 states have call successors, (0), 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 332 [2021-11-02 23:15:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:38,177 INFO L225 Difference]: With dead ends: 348 [2021-11-02 23:15:38,177 INFO L226 Difference]: Without dead ends: 341 [2021-11-02 23:15:38,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:15:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-02 23:15:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2021-11-02 23:15:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.0059347181008902) internal successors, (339), 337 states have internal predecessors, (339), 0 states have call successors, (0), 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 23:15:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 339 transitions. [2021-11-02 23:15:38,184 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 339 transitions. Word has length 332 [2021-11-02 23:15:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:38,184 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 339 transitions. [2021-11-02 23:15:38,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.9647058823529413) internal successors, (337), 85 states have internal predecessors, (337), 0 states have call successors, (0), 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 23:15:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 339 transitions. [2021-11-02 23:15:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-02 23:15:38,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:38,186 INFO L513 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:38,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-02 23:15:38,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:38,399 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:38,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1870951308, now seen corresponding path program 81 times [2021-11-02 23:15:38,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:38,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958427470] [2021-11-02 23:15:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:38,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:41,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:41,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958427470] [2021-11-02 23:15:41,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958427470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:41,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737047957] [2021-11-02 23:15:41,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:15:41,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:41,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:41,550 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:41,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-02 23:15:47,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2021-11-02 23:15:47,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-02 23:15:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:48,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737047957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:48,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:48,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-11-02 23:15:48,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907784380] [2021-11-02 23:15:48,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-02 23:15:48,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:48,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-02 23:15:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-11-02 23:15:48,647 INFO L87 Difference]: Start difference. First operand 338 states and 339 transitions. Second operand has 86 states, 86 states have (on average 3.9651162790697674) internal successors, (341), 86 states have internal predecessors, (341), 0 states have call successors, (0), 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 23:15:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:48,995 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2021-11-02 23:15:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-02 23:15:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.9651162790697674) internal successors, (341), 86 states have internal predecessors, (341), 0 states have call successors, (0), 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 336 [2021-11-02 23:15:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:48,998 INFO L225 Difference]: With dead ends: 352 [2021-11-02 23:15:48,998 INFO L226 Difference]: Without dead ends: 345 [2021-11-02 23:15:48,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-11-02 23:15:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-02 23:15:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2021-11-02 23:15:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.0058651026392962) internal successors, (343), 341 states have internal predecessors, (343), 0 states have call successors, (0), 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 23:15:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 343 transitions. [2021-11-02 23:15:49,006 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 343 transitions. Word has length 336 [2021-11-02 23:15:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:49,006 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 343 transitions. [2021-11-02 23:15:49,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.9651162790697674) internal successors, (341), 86 states have internal predecessors, (341), 0 states have call successors, (0), 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 23:15:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 343 transitions. [2021-11-02 23:15:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-02 23:15:49,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:49,009 INFO L513 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:49,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:49,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:49,209 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash 595199827, now seen corresponding path program 82 times [2021-11-02 23:15:49,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:49,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203266387] [2021-11-02 23:15:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:49,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:52,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:52,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203266387] [2021-11-02 23:15:52,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203266387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:52,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954680059] [2021-11-02 23:15:52,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:15:52,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:52,456 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:52,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-02 23:15:58,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:15:58,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-02 23:15:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:59,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954680059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:59,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:59,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-11-02 23:15:59,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400041234] [2021-11-02 23:15:59,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-02 23:15:59,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:59,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-02 23:15:59,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:15:59,175 INFO L87 Difference]: Start difference. First operand 342 states and 343 transitions. Second operand has 87 states, 87 states have (on average 3.9655172413793105) internal successors, (345), 87 states have internal predecessors, (345), 0 states have call successors, (0), 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 23:15:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:59,476 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2021-11-02 23:15:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-02 23:15:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9655172413793105) internal successors, (345), 87 states have internal predecessors, (345), 0 states have call successors, (0), 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 340 [2021-11-02 23:15:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:59,479 INFO L225 Difference]: With dead ends: 356 [2021-11-02 23:15:59,479 INFO L226 Difference]: Without dead ends: 349 [2021-11-02 23:15:59,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:15:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-02 23:15:59,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2021-11-02 23:15:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.0057971014492753) internal successors, (347), 345 states have internal predecessors, (347), 0 states have call successors, (0), 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 23:15:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 347 transitions. [2021-11-02 23:15:59,487 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 347 transitions. Word has length 340 [2021-11-02 23:15:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:59,487 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 347 transitions. [2021-11-02 23:15:59,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9655172413793105) internal successors, (345), 87 states have internal predecessors, (345), 0 states have call successors, (0), 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 23:15:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 347 transitions. [2021-11-02 23:15:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-02 23:15:59,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:59,490 INFO L513 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:59,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-11-02 23:15:59,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-11-02 23:15:59,690 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash -144547942, now seen corresponding path program 83 times [2021-11-02 23:15:59,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:59,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657874964] [2021-11-02 23:15:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:59,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:03,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:03,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657874964] [2021-11-02 23:16:03,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657874964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:03,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899794017] [2021-11-02 23:16:03,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:16:03,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:03,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:03,059 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:03,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-02 23:16:09,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-11-02 23:16:09,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-02 23:16:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:10,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899794017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:10,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:10,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-11-02 23:16:10,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337800660] [2021-11-02 23:16:10,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-02 23:16:10,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-02 23:16:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-02 23:16:10,309 INFO L87 Difference]: Start difference. First operand 346 states and 347 transitions. Second operand has 88 states, 88 states have (on average 3.965909090909091) internal successors, (349), 88 states have internal predecessors, (349), 0 states have call successors, (0), 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 23:16:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:10,634 INFO L93 Difference]: Finished difference Result 360 states and 362 transitions. [2021-11-02 23:16:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-02 23:16:10,635 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.965909090909091) internal successors, (349), 88 states have internal predecessors, (349), 0 states have call successors, (0), 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 344 [2021-11-02 23:16:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:10,637 INFO L225 Difference]: With dead ends: 360 [2021-11-02 23:16:10,637 INFO L226 Difference]: Without dead ends: 353 [2021-11-02 23:16:10,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-02 23:16:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-02 23:16:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2021-11-02 23:16:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.005730659025788) internal successors, (351), 349 states have internal predecessors, (351), 0 states have call successors, (0), 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 23:16:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 351 transitions. [2021-11-02 23:16:10,644 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 351 transitions. Word has length 344 [2021-11-02 23:16:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:10,644 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 351 transitions. [2021-11-02 23:16:10,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.965909090909091) internal successors, (349), 88 states have internal predecessors, (349), 0 states have call successors, (0), 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 23:16:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 351 transitions. [2021-11-02 23:16:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-02 23:16:10,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:10,647 INFO L513 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:10,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:10,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-11-02 23:16:10,847 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1934048353, now seen corresponding path program 84 times [2021-11-02 23:16:10,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:10,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691565942] [2021-11-02 23:16:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:10,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:14,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:14,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691565942] [2021-11-02 23:16:14,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691565942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:14,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241966974] [2021-11-02 23:16:14,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:16:14,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:14,230 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:14,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-02 23:16:20,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2021-11-02 23:16:20,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:20,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2976 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-02 23:16:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:21,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241966974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:21,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:21,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2021-11-02 23:16:21,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377783746] [2021-11-02 23:16:21,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-02 23:16:21,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-02 23:16:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-11-02 23:16:21,750 INFO L87 Difference]: Start difference. First operand 350 states and 351 transitions. Second operand has 89 states, 89 states have (on average 3.966292134831461) internal successors, (353), 89 states have internal predecessors, (353), 0 states have call successors, (0), 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 23:16:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:22,073 INFO L93 Difference]: Finished difference Result 364 states and 366 transitions. [2021-11-02 23:16:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-02 23:16:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.966292134831461) internal successors, (353), 89 states have internal predecessors, (353), 0 states have call successors, (0), 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 348 [2021-11-02 23:16:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:22,076 INFO L225 Difference]: With dead ends: 364 [2021-11-02 23:16:22,076 INFO L226 Difference]: Without dead ends: 357 [2021-11-02 23:16:22,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-11-02 23:16:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-02 23:16:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 354. [2021-11-02 23:16:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.0056657223796035) internal successors, (355), 353 states have internal predecessors, (355), 0 states have call successors, (0), 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 23:16:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 355 transitions. [2021-11-02 23:16:22,083 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 355 transitions. Word has length 348 [2021-11-02 23:16:22,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:22,083 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 355 transitions. [2021-11-02 23:16:22,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.966292134831461) internal successors, (353), 89 states have internal predecessors, (353), 0 states have call successors, (0), 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 23:16:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 355 transitions. [2021-11-02 23:16:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-02 23:16:22,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:22,086 INFO L513 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:22,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:22,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-02 23:16:22,286 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2074976856, now seen corresponding path program 85 times [2021-11-02 23:16:22,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:22,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744312356] [2021-11-02 23:16:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:22,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:25,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:25,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744312356] [2021-11-02 23:16:25,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744312356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:25,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404080090] [2021-11-02 23:16:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:16:25,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:25,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:25,804 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:25,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-02 23:16:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:31,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-02 23:16:31,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:32,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404080090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:32,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:32,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-02 23:16:32,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223890188] [2021-11-02 23:16:32,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-02 23:16:32,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-02 23:16:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-02 23:16:32,964 INFO L87 Difference]: Start difference. First operand 354 states and 355 transitions. Second operand has 90 states, 90 states have (on average 3.966666666666667) internal successors, (357), 90 states have internal predecessors, (357), 0 states have call successors, (0), 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 23:16:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:33,306 INFO L93 Difference]: Finished difference Result 368 states and 370 transitions. [2021-11-02 23:16:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-02 23:16:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.966666666666667) internal successors, (357), 90 states have internal predecessors, (357), 0 states have call successors, (0), 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 352 [2021-11-02 23:16:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:33,309 INFO L225 Difference]: With dead ends: 368 [2021-11-02 23:16:33,309 INFO L226 Difference]: Without dead ends: 361 [2021-11-02 23:16:33,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-02 23:16:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-02 23:16:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 358. [2021-11-02 23:16:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.0056022408963585) internal successors, (359), 357 states have internal predecessors, (359), 0 states have call successors, (0), 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 23:16:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2021-11-02 23:16:33,319 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 352 [2021-11-02 23:16:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:33,320 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2021-11-02 23:16:33,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.966666666666667) internal successors, (357), 90 states have internal predecessors, (357), 0 states have call successors, (0), 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 23:16:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2021-11-02 23:16:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-11-02 23:16:33,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:33,324 INFO L513 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:33,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:33,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-02 23:16:33,537 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:33,537 INFO L85 PathProgramCache]: Analyzing trace with hash -322075793, now seen corresponding path program 86 times [2021-11-02 23:16:33,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:33,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794673070] [2021-11-02 23:16:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:33,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:37,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:37,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794673070] [2021-11-02 23:16:37,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794673070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:37,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24080693] [2021-11-02 23:16:37,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:16:37,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:37,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:37,041 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:37,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-02 23:16:43,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:16:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:43,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 3044 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-02 23:16:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:44,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24080693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:44,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:44,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-11-02 23:16:44,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105516307] [2021-11-02 23:16:44,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-02 23:16:44,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:44,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-02 23:16:44,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-02 23:16:44,415 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand has 91 states, 91 states have (on average 3.967032967032967) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 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 23:16:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:44,742 INFO L93 Difference]: Finished difference Result 372 states and 374 transitions. [2021-11-02 23:16:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-02 23:16:44,743 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.967032967032967) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 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 356 [2021-11-02 23:16:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:44,745 INFO L225 Difference]: With dead ends: 372 [2021-11-02 23:16:44,745 INFO L226 Difference]: Without dead ends: 365 [2021-11-02 23:16:44,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-02 23:16:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-02 23:16:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2021-11-02 23:16:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.005540166204986) internal successors, (363), 361 states have internal predecessors, (363), 0 states have call successors, (0), 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 23:16:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 363 transitions. [2021-11-02 23:16:44,752 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 363 transitions. Word has length 356 [2021-11-02 23:16:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:44,752 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 363 transitions. [2021-11-02 23:16:44,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.967032967032967) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 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 23:16:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 363 transitions. [2021-11-02 23:16:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-11-02 23:16:44,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:44,755 INFO L513 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:44,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:44,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:44,955 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1272812106, now seen corresponding path program 87 times [2021-11-02 23:16:44,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:44,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764084926] [2021-11-02 23:16:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:44,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:48,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:48,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764084926] [2021-11-02 23:16:48,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764084926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:48,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965128605] [2021-11-02 23:16:48,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:16:48,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:48,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:48,557 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:48,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-02 23:16:55,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2021-11-02 23:16:55,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:55,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-02 23:16:55,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:56,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965128605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:56,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:56,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2021-11-02 23:16:56,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793648754] [2021-11-02 23:16:56,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-02 23:16:56,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-02 23:16:56,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-02 23:16:56,698 INFO L87 Difference]: Start difference. First operand 362 states and 363 transitions. Second operand has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 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 23:16:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:57,052 INFO L93 Difference]: Finished difference Result 376 states and 378 transitions. [2021-11-02 23:16:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-02 23:16:57,053 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 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 360 [2021-11-02 23:16:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:57,055 INFO L225 Difference]: With dead ends: 376 [2021-11-02 23:16:57,055 INFO L226 Difference]: Without dead ends: 369 [2021-11-02 23:16:57,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-02 23:16:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-02 23:16:57,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2021-11-02 23:16:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.0054794520547945) internal successors, (367), 365 states have internal predecessors, (367), 0 states have call successors, (0), 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 23:16:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 367 transitions. [2021-11-02 23:16:57,063 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 367 transitions. Word has length 360 [2021-11-02 23:16:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:57,063 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 367 transitions. [2021-11-02 23:16:57,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 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 23:16:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 367 transitions. [2021-11-02 23:16:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-02 23:16:57,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:57,068 INFO L513 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:57,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:57,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:57,269 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1764041603, now seen corresponding path program 88 times [2021-11-02 23:16:57,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:57,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781669008] [2021-11-02 23:16:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:57,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:00,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:00,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781669008] [2021-11-02 23:17:00,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781669008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:00,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369029622] [2021-11-02 23:17:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:00,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:00,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:00,939 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:00,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-02 23:17:07,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:07,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-02 23:17:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:08,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369029622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:08,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:08,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-11-02 23:17:08,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769337054] [2021-11-02 23:17:08,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-02 23:17:08,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-02 23:17:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-02 23:17:08,632 INFO L87 Difference]: Start difference. First operand 366 states and 367 transitions. Second operand has 93 states, 93 states have (on average 3.967741935483871) internal successors, (369), 93 states have internal predecessors, (369), 0 states have call successors, (0), 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 23:17:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:09,024 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2021-11-02 23:17:09,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-02 23:17:09,025 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.967741935483871) internal successors, (369), 93 states have internal predecessors, (369), 0 states have call successors, (0), 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 364 [2021-11-02 23:17:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:09,027 INFO L225 Difference]: With dead ends: 380 [2021-11-02 23:17:09,027 INFO L226 Difference]: Without dead ends: 373 [2021-11-02 23:17:09,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-02 23:17:09,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-02 23:17:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2021-11-02 23:17:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.005420054200542) internal successors, (371), 369 states have internal predecessors, (371), 0 states have call successors, (0), 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 23:17:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 371 transitions. [2021-11-02 23:17:09,129 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 371 transitions. Word has length 364 [2021-11-02 23:17:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:09,130 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 371 transitions. [2021-11-02 23:17:09,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.967741935483871) internal successors, (369), 93 states have internal predecessors, (369), 0 states have call successors, (0), 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 23:17:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 371 transitions. [2021-11-02 23:17:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-02 23:17:09,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:09,132 INFO L513 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:09,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:09,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:09,333 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:09,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1990234052, now seen corresponding path program 89 times [2021-11-02 23:17:09,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:09,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847155595] [2021-11-02 23:17:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:09,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:13,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:13,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847155595] [2021-11-02 23:17:13,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847155595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:13,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098146704] [2021-11-02 23:17:13,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:13,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:13,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:13,007 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:13,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-02 23:17:20,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-11-02 23:17:20,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:20,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 3146 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-02 23:17:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:21,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098146704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:21,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:21,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-11-02 23:17:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829330425] [2021-11-02 23:17:21,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-02 23:17:21,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-02 23:17:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-02 23:17:21,417 INFO L87 Difference]: Start difference. First operand 370 states and 371 transitions. Second operand has 94 states, 94 states have (on average 3.9680851063829787) internal successors, (373), 94 states have internal predecessors, (373), 0 states have call successors, (0), 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 23:17:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:21,780 INFO L93 Difference]: Finished difference Result 384 states and 386 transitions. [2021-11-02 23:17:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-02 23:17:21,781 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.9680851063829787) internal successors, (373), 94 states have internal predecessors, (373), 0 states have call successors, (0), 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 368 [2021-11-02 23:17:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:21,783 INFO L225 Difference]: With dead ends: 384 [2021-11-02 23:17:21,783 INFO L226 Difference]: Without dead ends: 377 [2021-11-02 23:17:21,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-02 23:17:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-02 23:17:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 374. [2021-11-02 23:17:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.0053619302949062) internal successors, (375), 373 states have internal predecessors, (375), 0 states have call successors, (0), 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 23:17:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 375 transitions. [2021-11-02 23:17:21,790 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 375 transitions. Word has length 368 [2021-11-02 23:17:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:21,790 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 375 transitions. [2021-11-02 23:17:21,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.9680851063829787) internal successors, (373), 94 states have internal predecessors, (373), 0 states have call successors, (0), 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 23:17:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 375 transitions. [2021-11-02 23:17:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-11-02 23:17:21,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:21,792 INFO L513 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:21,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-02 23:17:21,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:21,993 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:21,994 INFO L85 PathProgramCache]: Analyzing trace with hash -901953653, now seen corresponding path program 90 times [2021-11-02 23:17:21,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:21,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624847473] [2021-11-02 23:17:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:21,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:25,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:25,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624847473] [2021-11-02 23:17:25,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624847473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:25,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511933620] [2021-11-02 23:17:25,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:25,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:25,799 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:25,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-02 23:17:33,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2021-11-02 23:17:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:33,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-02 23:17:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:34,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511933620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:34,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:34,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2021-11-02 23:17:34,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089445311] [2021-11-02 23:17:34,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-02 23:17:34,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:34,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-02 23:17:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-11-02 23:17:34,585 INFO L87 Difference]: Start difference. First operand 374 states and 375 transitions. Second operand has 95 states, 95 states have (on average 3.968421052631579) internal successors, (377), 95 states have internal predecessors, (377), 0 states have call successors, (0), 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 23:17:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:34,921 INFO L93 Difference]: Finished difference Result 388 states and 390 transitions. [2021-11-02 23:17:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-02 23:17:34,922 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.968421052631579) internal successors, (377), 95 states have internal predecessors, (377), 0 states have call successors, (0), 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 372 [2021-11-02 23:17:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:34,924 INFO L225 Difference]: With dead ends: 388 [2021-11-02 23:17:34,924 INFO L226 Difference]: Without dead ends: 381 [2021-11-02 23:17:34,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-11-02 23:17:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-02 23:17:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 378. [2021-11-02 23:17:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.0053050397877985) internal successors, (379), 377 states have internal predecessors, (379), 0 states have call successors, (0), 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 23:17:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 379 transitions. [2021-11-02 23:17:34,931 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 379 transitions. Word has length 372 [2021-11-02 23:17:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:34,931 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 379 transitions. [2021-11-02 23:17:34,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.968421052631579) internal successors, (377), 95 states have internal predecessors, (377), 0 states have call successors, (0), 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 23:17:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 379 transitions. [2021-11-02 23:17:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-11-02 23:17:34,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:34,934 INFO L513 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:34,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-02 23:17:35,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:35,135 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash 228246482, now seen corresponding path program 91 times [2021-11-02 23:17:35,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:35,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633610997] [2021-11-02 23:17:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:35,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:39,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:39,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633610997] [2021-11-02 23:17:39,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633610997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:39,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393461351] [2021-11-02 23:17:39,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:17:39,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:39,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:39,248 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:39,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-02 23:17:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:46,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-02 23:17:46,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:47,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393461351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:47,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:47,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-02 23:17:47,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169514722] [2021-11-02 23:17:47,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-02 23:17:47,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:47,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-02 23:17:47,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-02 23:17:47,612 INFO L87 Difference]: Start difference. First operand 378 states and 379 transitions. Second operand has 96 states, 96 states have (on average 3.96875) internal successors, (381), 96 states have internal predecessors, (381), 0 states have call successors, (0), 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 23:17:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:47,984 INFO L93 Difference]: Finished difference Result 392 states and 394 transitions. [2021-11-02 23:17:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-02 23:17:47,984 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.96875) internal successors, (381), 96 states have internal predecessors, (381), 0 states have call successors, (0), 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 376 [2021-11-02 23:17:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:47,987 INFO L225 Difference]: With dead ends: 392 [2021-11-02 23:17:47,987 INFO L226 Difference]: Without dead ends: 385 [2021-11-02 23:17:47,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-02 23:17:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-02 23:17:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 382. [2021-11-02 23:17:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.005249343832021) internal successors, (383), 381 states have internal predecessors, (383), 0 states have call successors, (0), 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 23:17:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 383 transitions. [2021-11-02 23:17:47,994 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 383 transitions. Word has length 376 [2021-11-02 23:17:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:47,994 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 383 transitions. [2021-11-02 23:17:47,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.96875) internal successors, (381), 96 states have internal predecessors, (381), 0 states have call successors, (0), 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 23:17:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 383 transitions. [2021-11-02 23:17:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-02 23:17:47,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:47,996 INFO L513 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:48,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:48,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-11-02 23:17:48,197 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash 834847897, now seen corresponding path program 92 times [2021-11-02 23:17:48,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:48,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73775065] [2021-11-02 23:17:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:48,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:52,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:52,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73775065] [2021-11-02 23:17:52,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73775065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:52,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662061613] [2021-11-02 23:17:52,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:52,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:52,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:52,501 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:52,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-02 23:17:59,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:59,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 3248 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-02 23:17:59,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:01,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662061613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:01,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:01,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-11-02 23:18:01,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005944209] [2021-11-02 23:18:01,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-02 23:18:01,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-02 23:18:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-02 23:18:01,041 INFO L87 Difference]: Start difference. First operand 382 states and 383 transitions. Second operand has 97 states, 97 states have (on average 3.9690721649484537) internal successors, (385), 97 states have internal predecessors, (385), 0 states have call successors, (0), 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 23:18:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:01,425 INFO L93 Difference]: Finished difference Result 396 states and 398 transitions. [2021-11-02 23:18:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-02 23:18:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9690721649484537) internal successors, (385), 97 states have internal predecessors, (385), 0 states have call successors, (0), 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 380 [2021-11-02 23:18:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:01,428 INFO L225 Difference]: With dead ends: 396 [2021-11-02 23:18:01,428 INFO L226 Difference]: Without dead ends: 389 [2021-11-02 23:18:01,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-02 23:18:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-02 23:18:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 386. [2021-11-02 23:18:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.0051948051948052) internal successors, (387), 385 states have internal predecessors, (387), 0 states have call successors, (0), 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 23:18:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2021-11-02 23:18:01,435 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 380 [2021-11-02 23:18:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:01,436 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2021-11-02 23:18:01,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9690721649484537) internal successors, (385), 97 states have internal predecessors, (385), 0 states have call successors, (0), 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 23:18:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2021-11-02 23:18:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-02 23:18:01,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:01,439 INFO L513 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:01,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-11-02 23:18:01,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:01,640 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:01,640 INFO L85 PathProgramCache]: Analyzing trace with hash 215943648, now seen corresponding path program 93 times [2021-11-02 23:18:01,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:01,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483727036] [2021-11-02 23:18:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:01,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:05,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:05,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483727036] [2021-11-02 23:18:05,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483727036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:05,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643866606] [2021-11-02 23:18:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:05,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:05,949 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:05,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-02 23:18:14,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2021-11-02 23:18:14,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:14,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-02 23:18:14,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:15,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643866606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:15,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:15,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2021-11-02 23:18:15,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096576093] [2021-11-02 23:18:15,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-02 23:18:15,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-02 23:18:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-11-02 23:18:15,307 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand has 98 states, 98 states have (on average 3.9693877551020407) internal successors, (389), 98 states have internal predecessors, (389), 0 states have call successors, (0), 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 23:18:15,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:15,750 INFO L93 Difference]: Finished difference Result 400 states and 402 transitions. [2021-11-02 23:18:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-02 23:18:15,751 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.9693877551020407) internal successors, (389), 98 states have internal predecessors, (389), 0 states have call successors, (0), 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 384 [2021-11-02 23:18:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:15,753 INFO L225 Difference]: With dead ends: 400 [2021-11-02 23:18:15,754 INFO L226 Difference]: Without dead ends: 393 [2021-11-02 23:18:15,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-11-02 23:18:15,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-02 23:18:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2021-11-02 23:18:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0051413881748072) internal successors, (391), 389 states have internal predecessors, (391), 0 states have call successors, (0), 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 23:18:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 391 transitions. [2021-11-02 23:18:15,764 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 391 transitions. Word has length 384 [2021-11-02 23:18:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:15,765 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 391 transitions. [2021-11-02 23:18:15,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.9693877551020407) internal successors, (389), 98 states have internal predecessors, (389), 0 states have call successors, (0), 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 23:18:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 391 transitions. [2021-11-02 23:18:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-11-02 23:18:15,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:15,768 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:15,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-11-02 23:18:15,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:15,969 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:15,970 INFO L85 PathProgramCache]: Analyzing trace with hash -902212697, now seen corresponding path program 94 times [2021-11-02 23:18:15,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:15,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523875822] [2021-11-02 23:18:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:15,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:20,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:20,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523875822] [2021-11-02 23:18:20,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523875822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:20,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319551164] [2021-11-02 23:18:20,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:20,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:20,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:20,368 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:20,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-02 23:18:27,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:27,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:27,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 3316 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-02 23:18:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:28,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319551164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:28,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:28,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-11-02 23:18:28,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994661605] [2021-11-02 23:18:28,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-02 23:18:28,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-02 23:18:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-02 23:18:28,868 INFO L87 Difference]: Start difference. First operand 390 states and 391 transitions. Second operand has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 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 23:18:29,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:29,224 INFO L93 Difference]: Finished difference Result 404 states and 406 transitions. [2021-11-02 23:18:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-02 23:18:29,225 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 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 388 [2021-11-02 23:18:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:29,227 INFO L225 Difference]: With dead ends: 404 [2021-11-02 23:18:29,227 INFO L226 Difference]: Without dead ends: 397 [2021-11-02 23:18:29,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-02 23:18:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-02 23:18:29,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 394. [2021-11-02 23:18:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.005089058524173) internal successors, (395), 393 states have internal predecessors, (395), 0 states have call successors, (0), 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 23:18:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2021-11-02 23:18:29,234 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 388 [2021-11-02 23:18:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:29,234 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2021-11-02 23:18:29,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 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 23:18:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2021-11-02 23:18:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-02 23:18:29,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:29,237 INFO L513 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:29,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:29,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:29,437 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:29,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1513841134, now seen corresponding path program 95 times [2021-11-02 23:18:29,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:29,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270113395] [2021-11-02 23:18:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:29,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:33,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:33,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270113395] [2021-11-02 23:18:33,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270113395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:33,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588796231] [2021-11-02 23:18:33,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:33,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:33,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:33,607 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:33,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-02 23:18:41,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-11-02 23:18:41,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:41,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 3350 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-02 23:18:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:42,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588796231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:42,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:42,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-11-02 23:18:42,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631055991] [2021-11-02 23:18:42,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-02 23:18:42,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-02 23:18:42,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 23:18:42,519 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand has 100 states, 100 states have (on average 3.97) internal successors, (397), 100 states have internal predecessors, (397), 0 states have call successors, (0), 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 23:18:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:42,873 INFO L93 Difference]: Finished difference Result 408 states and 410 transitions. [2021-11-02 23:18:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-02 23:18:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.97) internal successors, (397), 100 states have internal predecessors, (397), 0 states have call successors, (0), 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 392 [2021-11-02 23:18:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:42,875 INFO L225 Difference]: With dead ends: 408 [2021-11-02 23:18:42,875 INFO L226 Difference]: Without dead ends: 401 [2021-11-02 23:18:42,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 23:18:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-02 23:18:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 398. [2021-11-02 23:18:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.0050377833753148) internal successors, (399), 397 states have internal predecessors, (399), 0 states have call successors, (0), 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 23:18:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 399 transitions. [2021-11-02 23:18:42,882 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 399 transitions. Word has length 392 [2021-11-02 23:18:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:42,883 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 399 transitions. [2021-11-02 23:18:42,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.97) internal successors, (397), 100 states have internal predecessors, (397), 0 states have call successors, (0), 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 23:18:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 399 transitions. [2021-11-02 23:18:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-02 23:18:42,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:42,886 INFO L513 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:42,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:43,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:43,091 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:43,091 INFO L85 PathProgramCache]: Analyzing trace with hash -496044875, now seen corresponding path program 96 times [2021-11-02 23:18:43,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:43,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969846178] [2021-11-02 23:18:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:43,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:47,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:47,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969846178] [2021-11-02 23:18:47,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969846178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:47,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952660278] [2021-11-02 23:18:47,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:47,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:47,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:47,623 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:47,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-02 23:18:55,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2021-11-02 23:18:55,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 3384 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-02 23:18:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:57,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952660278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:57,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:57,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2021-11-02 23:18:57,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884060430] [2021-11-02 23:18:57,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-02 23:18:57,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:57,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-02 23:18:57,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-11-02 23:18:57,123 INFO L87 Difference]: Start difference. First operand 398 states and 399 transitions. Second operand has 101 states, 101 states have (on average 3.9702970297029703) internal successors, (401), 101 states have internal predecessors, (401), 0 states have call successors, (0), 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 23:18:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:57,507 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2021-11-02 23:18:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-02 23:18:57,507 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.9702970297029703) internal successors, (401), 101 states have internal predecessors, (401), 0 states have call successors, (0), 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 396 [2021-11-02 23:18:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:57,510 INFO L225 Difference]: With dead ends: 412 [2021-11-02 23:18:57,511 INFO L226 Difference]: Without dead ends: 405 [2021-11-02 23:18:57,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-11-02 23:18:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-02 23:18:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 402. [2021-11-02 23:18:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.0049875311720697) internal successors, (403), 401 states have internal predecessors, (403), 0 states have call successors, (0), 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 23:18:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 403 transitions. [2021-11-02 23:18:57,522 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 403 transitions. Word has length 396 [2021-11-02 23:18:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:57,522 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 403 transitions. [2021-11-02 23:18:57,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.9702970297029703) internal successors, (401), 101 states have internal predecessors, (401), 0 states have call successors, (0), 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 23:18:57,522 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 403 transitions. [2021-11-02 23:18:57,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-02 23:18:57,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:57,525 INFO L513 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:57,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:57,727 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:57,727 INFO L85 PathProgramCache]: Analyzing trace with hash 763218940, now seen corresponding path program 97 times [2021-11-02 23:18:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:57,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895495773] [2021-11-02 23:18:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:57,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:02,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895495773] [2021-11-02 23:19:02,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895495773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:02,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387239490] [2021-11-02 23:19:02,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:02,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:02,118 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:02,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-02 23:19:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:10,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 3418 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-02 23:19:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:11,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387239490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:11,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:11,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-11-02 23:19:11,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747076016] [2021-11-02 23:19:11,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-02 23:19:11,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-02 23:19:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-02 23:19:11,238 INFO L87 Difference]: Start difference. First operand 402 states and 403 transitions. Second operand has 102 states, 102 states have (on average 3.9705882352941178) internal successors, (405), 102 states have internal predecessors, (405), 0 states have call successors, (0), 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 23:19:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:11,626 INFO L93 Difference]: Finished difference Result 416 states and 418 transitions. [2021-11-02 23:19:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-02 23:19:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.9705882352941178) internal successors, (405), 102 states have internal predecessors, (405), 0 states have call successors, (0), 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 400 [2021-11-02 23:19:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:11,629 INFO L225 Difference]: With dead ends: 416 [2021-11-02 23:19:11,629 INFO L226 Difference]: Without dead ends: 409 [2021-11-02 23:19:11,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-02 23:19:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-02 23:19:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2021-11-02 23:19:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.0049382716049382) internal successors, (407), 405 states have internal predecessors, (407), 0 states have call successors, (0), 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 23:19:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 407 transitions. [2021-11-02 23:19:11,639 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 407 transitions. Word has length 400 [2021-11-02 23:19:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:11,639 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 407 transitions. [2021-11-02 23:19:11,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.9705882352941178) internal successors, (405), 102 states have internal predecessors, (405), 0 states have call successors, (0), 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 23:19:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 407 transitions. [2021-11-02 23:19:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-02 23:19:11,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:11,642 INFO L513 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:11,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:11,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-02 23:19:11,842 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash 456239043, now seen corresponding path program 98 times [2021-11-02 23:19:11,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:11,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193610288] [2021-11-02 23:19:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:11,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:16,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:16,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193610288] [2021-11-02 23:19:16,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193610288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:16,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165274361] [2021-11-02 23:19:16,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:16,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:16,719 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:16,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-02 23:19:24,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:24,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:25,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 3452 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-02 23:19:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:26,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165274361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:26,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:26,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-11-02 23:19:26,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246829910] [2021-11-02 23:19:26,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-02 23:19:26,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:26,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-02 23:19:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-02 23:19:26,242 INFO L87 Difference]: Start difference. First operand 406 states and 407 transitions. Second operand has 103 states, 103 states have (on average 3.970873786407767) internal successors, (409), 103 states have internal predecessors, (409), 0 states have call successors, (0), 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 23:19:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:26,647 INFO L93 Difference]: Finished difference Result 420 states and 422 transitions. [2021-11-02 23:19:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-02 23:19:26,648 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.970873786407767) internal successors, (409), 103 states have internal predecessors, (409), 0 states have call successors, (0), 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 404 [2021-11-02 23:19:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:26,649 INFO L225 Difference]: With dead ends: 420 [2021-11-02 23:19:26,649 INFO L226 Difference]: Without dead ends: 413 [2021-11-02 23:19:26,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-02 23:19:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-02 23:19:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2021-11-02 23:19:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.0048899755501222) internal successors, (411), 409 states have internal predecessors, (411), 0 states have call successors, (0), 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 23:19:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 411 transitions. [2021-11-02 23:19:26,657 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 411 transitions. Word has length 404 [2021-11-02 23:19:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:26,658 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 411 transitions. [2021-11-02 23:19:26,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.970873786407767) internal successors, (409), 103 states have internal predecessors, (409), 0 states have call successors, (0), 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 23:19:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 411 transitions. [2021-11-02 23:19:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-02 23:19:26,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:26,660 INFO L513 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:26,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-02 23:19:26,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-02 23:19:26,861 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:26,861 INFO L85 PathProgramCache]: Analyzing trace with hash 276056074, now seen corresponding path program 99 times [2021-11-02 23:19:26,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:26,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366852936] [2021-11-02 23:19:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:26,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:31,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:31,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366852936] [2021-11-02 23:19:31,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366852936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:31,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364388813] [2021-11-02 23:19:31,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:31,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:31,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:31,544 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:31,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-02 23:19:40,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2021-11-02 23:19:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 3486 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-02 23:19:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:41,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364388813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:41,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:41,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2021-11-02 23:19:41,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102821031] [2021-11-02 23:19:41,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-02 23:19:41,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:41,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-02 23:19:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2021-11-02 23:19:41,933 INFO L87 Difference]: Start difference. First operand 410 states and 411 transitions. Second operand has 104 states, 104 states have (on average 3.9711538461538463) internal successors, (413), 104 states have internal predecessors, (413), 0 states have call successors, (0), 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 23:19:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:42,336 INFO L93 Difference]: Finished difference Result 424 states and 426 transitions. [2021-11-02 23:19:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-02 23:19:42,337 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.9711538461538463) internal successors, (413), 104 states have internal predecessors, (413), 0 states have call successors, (0), 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 408 [2021-11-02 23:19:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:42,338 INFO L225 Difference]: With dead ends: 424 [2021-11-02 23:19:42,339 INFO L226 Difference]: Without dead ends: 417 [2021-11-02 23:19:42,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2021-11-02 23:19:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-02 23:19:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2021-11-02 23:19:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.0048426150121066) internal successors, (415), 413 states have internal predecessors, (415), 0 states have call successors, (0), 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 23:19:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 415 transitions. [2021-11-02 23:19:42,349 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 415 transitions. Word has length 408 [2021-11-02 23:19:42,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:42,349 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 415 transitions. [2021-11-02 23:19:42,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.9711538461538463) internal successors, (413), 104 states have internal predecessors, (413), 0 states have call successors, (0), 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 23:19:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 415 transitions. [2021-11-02 23:19:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-02 23:19:42,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:42,353 INFO L513 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:42,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-11-02 23:19:42,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-02 23:19:42,569 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:42,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1733258449, now seen corresponding path program 100 times [2021-11-02 23:19:42,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:42,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938922084] [2021-11-02 23:19:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:42,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:47,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:47,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938922084] [2021-11-02 23:19:47,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938922084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:47,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014259412] [2021-11-02 23:19:47,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:47,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:47,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:47,661 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:47,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-02 23:19:56,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:56,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 3520 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-02 23:19:56,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:57,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014259412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:57,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:57,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-11-02 23:19:57,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542715665] [2021-11-02 23:19:57,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-02 23:19:57,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-02 23:19:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-02 23:19:57,625 INFO L87 Difference]: Start difference. First operand 414 states and 415 transitions. Second operand has 105 states, 105 states have (on average 3.9714285714285715) internal successors, (417), 105 states have internal predecessors, (417), 0 states have call successors, (0), 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 23:19:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:58,070 INFO L93 Difference]: Finished difference Result 428 states and 430 transitions. [2021-11-02 23:19:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-02 23:19:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.9714285714285715) internal successors, (417), 105 states have internal predecessors, (417), 0 states have call successors, (0), 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 412 [2021-11-02 23:19:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:58,071 INFO L225 Difference]: With dead ends: 428 [2021-11-02 23:19:58,071 INFO L226 Difference]: Without dead ends: 421 [2021-11-02 23:19:58,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-02 23:19:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-02 23:19:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 418. [2021-11-02 23:19:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0047961630695443) internal successors, (419), 417 states have internal predecessors, (419), 0 states have call successors, (0), 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 23:19:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 419 transitions. [2021-11-02 23:19:58,078 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 419 transitions. Word has length 412 [2021-11-02 23:19:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:58,078 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 419 transitions. [2021-11-02 23:19:58,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.9714285714285715) internal successors, (417), 105 states have internal predecessors, (417), 0 states have call successors, (0), 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 23:19:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 419 transitions. [2021-11-02 23:19:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-11-02 23:19:58,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:58,081 INFO L513 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:58,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:58,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-02 23:19:58,281 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:58,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash -554904040, now seen corresponding path program 101 times [2021-11-02 23:19:58,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:58,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606041991] [2021-11-02 23:19:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:58,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:03,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:03,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606041991] [2021-11-02 23:20:03,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606041991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:03,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864815490] [2021-11-02 23:20:03,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:20:03,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:03,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:03,228 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:03,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-02 23:20:12,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2021-11-02 23:20:12,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 3554 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-02 23:20:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:13,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864815490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:13,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:13,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2021-11-02 23:20:13,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288652236] [2021-11-02 23:20:13,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-02 23:20:13,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-02 23:20:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-02 23:20:13,886 INFO L87 Difference]: Start difference. First operand 418 states and 419 transitions. Second operand has 106 states, 106 states have (on average 3.9716981132075473) internal successors, (421), 106 states have internal predecessors, (421), 0 states have call successors, (0), 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 23:20:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:14,331 INFO L93 Difference]: Finished difference Result 432 states and 434 transitions. [2021-11-02 23:20:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-02 23:20:14,331 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.9716981132075473) internal successors, (421), 106 states have internal predecessors, (421), 0 states have call successors, (0), 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 416 [2021-11-02 23:20:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:14,333 INFO L225 Difference]: With dead ends: 432 [2021-11-02 23:20:14,333 INFO L226 Difference]: Without dead ends: 425 [2021-11-02 23:20:14,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-02 23:20:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-02 23:20:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 422. [2021-11-02 23:20:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.004750593824228) internal successors, (423), 421 states have internal predecessors, (423), 0 states have call successors, (0), 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 23:20:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 423 transitions. [2021-11-02 23:20:14,340 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 423 transitions. Word has length 416 [2021-11-02 23:20:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:14,341 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 423 transitions. [2021-11-02 23:20:14,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.9716981132075473) internal successors, (421), 106 states have internal predecessors, (421), 0 states have call successors, (0), 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 23:20:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 423 transitions. [2021-11-02 23:20:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-02 23:20:14,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:14,343 INFO L513 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:14,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:14,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:14,544 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 194397151, now seen corresponding path program 102 times [2021-11-02 23:20:14,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:14,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138416945] [2021-11-02 23:20:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:14,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:19,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:19,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138416945] [2021-11-02 23:20:19,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138416945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:19,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261480712] [2021-11-02 23:20:19,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:20:19,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:19,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:19,736 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:19,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-02 23:20:29,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2021-11-02 23:20:29,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:29,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 3588 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-02 23:20:29,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:30,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261480712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:30,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:30,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2021-11-02 23:20:30,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136330280] [2021-11-02 23:20:30,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-02 23:20:30,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-02 23:20:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-02 23:20:30,704 INFO L87 Difference]: Start difference. First operand 422 states and 423 transitions. Second operand has 107 states, 107 states have (on average 3.97196261682243) internal successors, (425), 107 states have internal predecessors, (425), 0 states have call successors, (0), 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 23:20:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:31,141 INFO L93 Difference]: Finished difference Result 436 states and 438 transitions. [2021-11-02 23:20:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-02 23:20:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.97196261682243) internal successors, (425), 107 states have internal predecessors, (425), 0 states have call successors, (0), 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 420 [2021-11-02 23:20:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:31,143 INFO L225 Difference]: With dead ends: 436 [2021-11-02 23:20:31,143 INFO L226 Difference]: Without dead ends: 429 [2021-11-02 23:20:31,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-02 23:20:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-02 23:20:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 426. [2021-11-02 23:20:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.0047058823529411) internal successors, (427), 425 states have internal predecessors, (427), 0 states have call successors, (0), 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 23:20:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 427 transitions. [2021-11-02 23:20:31,150 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 427 transitions. Word has length 420 [2021-11-02 23:20:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:31,150 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 427 transitions. [2021-11-02 23:20:31,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.97196261682243) internal successors, (425), 107 states have internal predecessors, (425), 0 states have call successors, (0), 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 23:20:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 427 transitions. [2021-11-02 23:20:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-11-02 23:20:31,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:31,153 INFO L513 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:31,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-11-02 23:20:31,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c8659d-835a-4a9e-b78d-113337dd1d16/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:31,353 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:31,354 INFO L85 PathProgramCache]: Analyzing trace with hash -961186266, now seen corresponding path program 103 times [2021-11-02 23:20:31,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:31,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497899901] [2021-11-02 23:20:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:31,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat