./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de61.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de61.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro --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 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:11:37,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:11:37,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:11:37,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:11:37,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:11:37,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:11:37,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:11:37,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:11:37,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:11:37,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:11:37,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:11:37,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:11:37,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:11:37,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:11:37,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:11:37,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:11:37,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:11:37,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:11:37,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:11:37,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:11:37,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:11:37,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:11:37,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:11:37,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:11:37,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:11:37,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:11:37,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:11:37,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:11:37,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:11:37,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:11:37,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:11:37,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:11:37,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:11:37,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:11:37,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:11:37,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:11:37,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:11:37,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:11:37,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:11:37,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:11:37,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:11:37,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:11:37,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:11:37,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:11:37,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:11:37,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:11:37,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:11:37,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:11:37,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:11:37,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:11:37,676 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:11:37,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:11:37,677 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:11:37,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:11:37,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:11:37,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:11:37,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:11:37,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:11:37,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:11:37,679 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:11:37,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:11:37,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:11:37,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:11:37,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:11:37,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:11:37,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:11:37,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:11:37,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:11:37,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:11:37,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:11:37,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:11:37,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:11:37,683 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:11:37,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:11:37,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:11:37,684 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_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 [2022-11-18 20:11:37,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:11:38,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:11:38,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:11:38,012 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:11:38,014 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:11:38,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/loops-crafted-1/in-de61.c [2022-11-18 20:11:38,096 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/data/d21ad4531/1cde18e78a0f4bac8159cd15c0778a2a/FLAG542194aad [2022-11-18 20:11:38,540 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:11:38,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/sv-benchmarks/c/loops-crafted-1/in-de61.c [2022-11-18 20:11:38,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/data/d21ad4531/1cde18e78a0f4bac8159cd15c0778a2a/FLAG542194aad [2022-11-18 20:11:38,948 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/data/d21ad4531/1cde18e78a0f4bac8159cd15c0778a2a [2022-11-18 20:11:38,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:11:38,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:11:38,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:11:38,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:11:38,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:11:38,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:11:38" (1/1) ... [2022-11-18 20:11:38,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d21dce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:38, skipping insertion in model container [2022-11-18 20:11:38,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:11:38" (1/1) ... [2022-11-18 20:11:38,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:11:38,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:11:39,204 WARN L234 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_c91719f4-9fbc-4116-9c5a-8ea043f7d885/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2022-11-18 20:11:39,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:11:39,244 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:11:39,261 WARN L234 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_c91719f4-9fbc-4116-9c5a-8ea043f7d885/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2022-11-18 20:11:39,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:11:39,298 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:11:39,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39 WrapperNode [2022-11-18 20:11:39,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:11:39,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:11:39,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:11:39,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:11:39,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,347 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-18 20:11:39,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:11:39,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:11:39,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:11:39,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:11:39,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,381 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:11:39,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:11:39,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:11:39,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:11:39,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (1/1) ... [2022-11-18 20:11:39,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:11:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:39,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:39,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:11:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:11:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:11:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:11:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:11:39,547 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:11:39,549 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:11:39,748 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:11:39,755 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:11:39,755 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-18 20:11:39,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:11:39 BoogieIcfgContainer [2022-11-18 20:11:39,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:11:39,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:11:39,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:11:39,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:11:39,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:11:38" (1/3) ... [2022-11-18 20:11:39,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ec2743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:11:39, skipping insertion in model container [2022-11-18 20:11:39,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:39" (2/3) ... [2022-11-18 20:11:39,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ec2743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:11:39, skipping insertion in model container [2022-11-18 20:11:39,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:11:39" (3/3) ... [2022-11-18 20:11:39,789 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de61.c [2022-11-18 20:11:39,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:11:39,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:11:39,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:11:39,925 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f7ad59b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:11:39,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:11:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 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) [2022-11-18 20:11:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:11:39,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:39,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:39,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:39,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2022-11-18 20:11:39,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:39,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294137806] [2022-11-18 20:11:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:40,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:40,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294137806] [2022-11-18 20:11:40,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294137806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:40,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:40,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:11:40,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340880267] [2022-11-18 20:11:40,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:40,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:11:40,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:11:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:11:40,213 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2022-11-18 20:11:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:40,230 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2022-11-18 20:11:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:11:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 [2022-11-18 20:11:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:40,241 INFO L225 Difference]: With dead ends: 31 [2022-11-18 20:11:40,242 INFO L226 Difference]: Without dead ends: 13 [2022-11-18 20:11:40,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:11:40,249 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:40,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:11:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-18 20:11:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-18 20:11:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-11-18 20:11:40,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2022-11-18 20:11:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:40,286 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-11-18 20:11:40,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2022-11-18 20:11:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2022-11-18 20:11:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:11:40,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:40,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:40,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:11:40,288 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2022-11-18 20:11:40,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:40,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647941113] [2022-11-18 20:11:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:41,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647941113] [2022-11-18 20:11:41,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647941113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:41,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:41,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:11:41,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029688191] [2022-11-18 20:11:41,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:41,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:11:41,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:41,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:11:41,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:11:41,005 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-18 20:11:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:41,217 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2022-11-18 20:11:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:11:41,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 [2022-11-18 20:11:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:41,218 INFO L225 Difference]: With dead ends: 31 [2022-11-18 20:11:41,219 INFO L226 Difference]: Without dead ends: 14 [2022-11-18 20:11:41,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:11:41,221 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:41,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:11:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-18 20:11:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-18 20:11:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2022-11-18 20:11:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2022-11-18 20:11:41,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2022-11-18 20:11:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:41,227 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-11-18 20:11:41,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-18 20:11:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2022-11-18 20:11:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:11:41,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:41,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:41,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:11:41,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:41,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1427170164, now seen corresponding path program 1 times [2022-11-18 20:11:41,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:41,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599690556] [2022-11-18 20:11:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:41,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:41,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599690556] [2022-11-18 20:11:41,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599690556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:41,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024658722] [2022-11-18 20:11:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:41,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:41,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:41,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:41,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:11:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:41,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:11:41,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:41,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:41,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024658722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:41,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:41,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-18 20:11:41,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084873991] [2022-11-18 20:11:41,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:41,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:11:41,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:11:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:11:41,627 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-18 20:11:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:41,865 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2022-11-18 20:11:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:11:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) Word has length 13 [2022-11-18 20:11:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:41,868 INFO L225 Difference]: With dead ends: 58 [2022-11-18 20:11:41,868 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:11:41,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:11:41,869 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:41,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 62 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:11:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:11:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2022-11-18 20:11:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 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) [2022-11-18 20:11:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2022-11-18 20:11:41,881 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 55 transitions. Word has length 13 [2022-11-18 20:11:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:41,882 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 55 transitions. [2022-11-18 20:11:41,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-18 20:11:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 55 transitions. [2022-11-18 20:11:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:11:41,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:41,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:41,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:42,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:42,088 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:42,089 INFO L85 PathProgramCache]: Analyzing trace with hash -603304611, now seen corresponding path program 1 times [2022-11-18 20:11:42,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:42,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567686730] [2022-11-18 20:11:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:42,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:42,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:42,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567686730] [2022-11-18 20:11:42,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567686730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:42,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119122676] [2022-11-18 20:11:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:42,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:42,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:42,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:11:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:11:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:11:42,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:11:42,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119122676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:42,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:42,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2022-11-18 20:11:42,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736268426] [2022-11-18 20:11:42,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:42,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:11:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:42,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:11:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:11:42,441 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:42,779 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2022-11-18 20:11:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:11:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 20:11:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:42,782 INFO L225 Difference]: With dead ends: 107 [2022-11-18 20:11:42,783 INFO L226 Difference]: Without dead ends: 87 [2022-11-18 20:11:42,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:11:42,788 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:42,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 95 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:11:42,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-18 20:11:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 49. [2022-11-18 20:11:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 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) [2022-11-18 20:11:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2022-11-18 20:11:42,814 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 15 [2022-11-18 20:11:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:42,815 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2022-11-18 20:11:42,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2022-11-18 20:11:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:11:42,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:42,818 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:42,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:11:43,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:43,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:43,024 INFO L85 PathProgramCache]: Analyzing trace with hash 114935591, now seen corresponding path program 2 times [2022-11-18 20:11:43,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:43,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578409999] [2022-11-18 20:11:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:43,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:43,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:43,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578409999] [2022-11-18 20:11:43,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578409999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436665692] [2022-11-18 20:11:43,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:11:43,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:43,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:43,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:11:43,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:11:43,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:11:43,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:43,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:43,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436665692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:43,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:43,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-18 20:11:43,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45690640] [2022-11-18 20:11:43,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:11:43,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:11:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:11:43,452 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:44,646 INFO L93 Difference]: Finished difference Result 188 states and 307 transitions. [2022-11-18 20:11:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:11:44,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 20:11:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:44,648 INFO L225 Difference]: With dead ends: 188 [2022-11-18 20:11:44,648 INFO L226 Difference]: Without dead ends: 174 [2022-11-18 20:11:44,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:11:44,650 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 309 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:44,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 169 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:11:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-18 20:11:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2022-11-18 20:11:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 105 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) [2022-11-18 20:11:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 157 transitions. [2022-11-18 20:11:44,706 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 157 transitions. Word has length 16 [2022-11-18 20:11:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:44,707 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 157 transitions. [2022-11-18 20:11:44,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 157 transitions. [2022-11-18 20:11:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:11:44,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:44,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:44,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:44,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:44,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:44,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2022-11-18 20:11:44,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:44,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869807822] [2022-11-18 20:11:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:44,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:11:45,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:45,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869807822] [2022-11-18 20:11:45,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869807822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:45,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715880129] [2022-11-18 20:11:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:45,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:45,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:45,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:45,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:11:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:45,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:11:45,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:45,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:11:46,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715880129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:46,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:46,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 22 [2022-11-18 20:11:46,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014565458] [2022-11-18 20:11:46,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:46,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:11:46,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:46,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:11:46,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:11:46,287 INFO L87 Difference]: Start difference. First operand 106 states and 157 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:51,424 INFO L93 Difference]: Finished difference Result 212 states and 300 transitions. [2022-11-18 20:11:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-18 20:11:51,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 20:11:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:51,426 INFO L225 Difference]: With dead ends: 212 [2022-11-18 20:11:51,426 INFO L226 Difference]: Without dead ends: 200 [2022-11-18 20:11:51,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:11:51,428 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 174 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:51,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 73 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:11:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-18 20:11:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 119. [2022-11-18 20:11:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5423728813559323) internal successors, (182), 118 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 182 transitions. [2022-11-18 20:11:51,501 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 182 transitions. Word has length 18 [2022-11-18 20:11:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:51,501 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 182 transitions. [2022-11-18 20:11:51,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 182 transitions. [2022-11-18 20:11:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:11:51,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:51,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:51,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:51,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:51,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 748617255, now seen corresponding path program 2 times [2022-11-18 20:11:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122016407] [2022-11-18 20:11:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:51,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:51,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122016407] [2022-11-18 20:11:51,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122016407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:51,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073226498] [2022-11-18 20:11:51,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:11:51,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:51,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:51,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:11:51,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:11:51,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:51,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:11:51,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:11:52,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:11:52,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073226498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:52,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:52,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-11-18 20:11:52,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586322554] [2022-11-18 20:11:52,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:52,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:11:52,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:52,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:11:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:11:52,079 INFO L87 Difference]: Start difference. First operand 119 states and 182 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:53,274 INFO L93 Difference]: Finished difference Result 341 states and 489 transitions. [2022-11-18 20:11:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:11:53,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 20:11:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:53,277 INFO L225 Difference]: With dead ends: 341 [2022-11-18 20:11:53,277 INFO L226 Difference]: Without dead ends: 301 [2022-11-18 20:11:53,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:11:53,280 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:53,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 122 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:11:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-18 20:11:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 150. [2022-11-18 20:11:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 149 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) [2022-11-18 20:11:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 225 transitions. [2022-11-18 20:11:53,390 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 225 transitions. Word has length 18 [2022-11-18 20:11:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:53,390 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 225 transitions. [2022-11-18 20:11:53,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 225 transitions. [2022-11-18 20:11:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:11:53,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:53,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:53,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:53,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:11:53,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1346970424, now seen corresponding path program 2 times [2022-11-18 20:11:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:53,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402389786] [2022-11-18 20:11:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:11:53,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402389786] [2022-11-18 20:11:53,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402389786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164548347] [2022-11-18 20:11:53,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:11:53,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:53,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:53,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:53,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:11:53,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:11:53,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:11:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:11:53,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:11:53,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164548347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:53,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:53,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-18 20:11:53,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214887338] [2022-11-18 20:11:53,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:53,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:11:53,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:53,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:11:53,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:11:53,922 INFO L87 Difference]: Start difference. First operand 150 states and 225 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2022-11-18 20:11:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:54,065 INFO L93 Difference]: Finished difference Result 245 states and 367 transitions. [2022-11-18 20:11:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:11:54,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-18 20:11:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:54,067 INFO L225 Difference]: With dead ends: 245 [2022-11-18 20:11:54,067 INFO L226 Difference]: Without dead ends: 183 [2022-11-18 20:11:54,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:11:54,069 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:54,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:11:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-18 20:11:54,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 147. [2022-11-18 20:11:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 216 transitions. [2022-11-18 20:11:54,164 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 216 transitions. Word has length 20 [2022-11-18 20:11:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:54,164 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 216 transitions. [2022-11-18 20:11:54,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2022-11-18 20:11:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 216 transitions. [2022-11-18 20:11:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:11:54,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:54,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:54,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:54,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:54,371 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash 48319293, now seen corresponding path program 1 times [2022-11-18 20:11:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:54,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890670027] [2022-11-18 20:11:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:11:54,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:54,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890670027] [2022-11-18 20:11:54,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890670027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:54,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518237258] [2022-11-18 20:11:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:54,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:54,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:54,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:54,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:11:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:54,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:11:54,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:11:54,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518237258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:54,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:54,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2022-11-18 20:11:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911037489] [2022-11-18 20:11:54,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:54,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:11:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:11:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:11:54,723 INFO L87 Difference]: Start difference. First operand 147 states and 216 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:55,273 INFO L93 Difference]: Finished difference Result 235 states and 339 transitions. [2022-11-18 20:11:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:11:55,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 20:11:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:55,275 INFO L225 Difference]: With dead ends: 235 [2022-11-18 20:11:55,275 INFO L226 Difference]: Without dead ends: 186 [2022-11-18 20:11:55,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:11:55,277 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:55,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 127 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:11:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-18 20:11:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2022-11-18 20:11:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 142 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) [2022-11-18 20:11:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 211 transitions. [2022-11-18 20:11:55,353 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 211 transitions. Word has length 21 [2022-11-18 20:11:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:55,353 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 211 transitions. [2022-11-18 20:11:55,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 211 transitions. [2022-11-18 20:11:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:11:55,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:55,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:55,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:55,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:55,560 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1411583389, now seen corresponding path program 3 times [2022-11-18 20:11:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:55,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685081012] [2022-11-18 20:11:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:55,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:55,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:55,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685081012] [2022-11-18 20:11:55,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685081012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:55,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512843833] [2022-11-18 20:11:55,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:11:55,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:55,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:55,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:55,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:11:55,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:11:55,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:55,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:55,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:11:55,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:11:55,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512843833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:55,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:55,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-18 20:11:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330226179] [2022-11-18 20:11:55,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:55,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:11:55,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:55,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:11:55,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:11:55,998 INFO L87 Difference]: Start difference. First operand 143 states and 211 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2022-11-18 20:11:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:58,694 INFO L93 Difference]: Finished difference Result 414 states and 573 transitions. [2022-11-18 20:11:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 20:11:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 20:11:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:58,700 INFO L225 Difference]: With dead ends: 414 [2022-11-18 20:11:58,700 INFO L226 Difference]: Without dead ends: 378 [2022-11-18 20:11:58,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2022-11-18 20:11:58,704 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 269 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:58,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 248 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:11:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-18 20:11:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 167. [2022-11-18 20:11:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4879518072289157) internal successors, (247), 166 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) [2022-11-18 20:11:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 247 transitions. [2022-11-18 20:11:58,803 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 247 transitions. Word has length 21 [2022-11-18 20:11:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:58,803 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 247 transitions. [2022-11-18 20:11:58,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2022-11-18 20:11:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 247 transitions. [2022-11-18 20:11:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:11:58,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:58,805 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:58,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:59,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:11:59,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1195101891, now seen corresponding path program 2 times [2022-11-18 20:11:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:59,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601446265] [2022-11-18 20:11:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:11:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601446265] [2022-11-18 20:11:59,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601446265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733397494] [2022-11-18 20:11:59,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:11:59,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:59,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:59,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:59,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:11:59,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:11:59,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:11:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:11:59,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:11:59,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733397494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:59,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:59,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 4] total 13 [2022-11-18 20:11:59,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680399549] [2022-11-18 20:11:59,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:59,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:11:59,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:11:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:11:59,391 INFO L87 Difference]: Start difference. First operand 167 states and 247 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-11-18 20:12:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:00,291 INFO L93 Difference]: Finished difference Result 311 states and 463 transitions. [2022-11-18 20:12:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:12:00,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 20:12:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:00,294 INFO L225 Difference]: With dead ends: 311 [2022-11-18 20:12:00,294 INFO L226 Difference]: Without dead ends: 285 [2022-11-18 20:12:00,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:12:00,295 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:00,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 230 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:12:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-18 20:12:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 211. [2022-11-18 20:12:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.4714285714285715) internal successors, (309), 210 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) [2022-11-18 20:12:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 309 transitions. [2022-11-18 20:12:00,425 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 309 transitions. Word has length 21 [2022-11-18 20:12:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:00,426 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 309 transitions. [2022-11-18 20:12:00,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-11-18 20:12:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 309 transitions. [2022-11-18 20:12:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 20:12:00,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:00,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:00,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 20:12:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:12:00,632 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:12:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1372519271, now seen corresponding path program 3 times [2022-11-18 20:12:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156472202] [2022-11-18 20:12:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:12:00,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:00,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156472202] [2022-11-18 20:12:00,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156472202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:00,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69727121] [2022-11-18 20:12:00,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:12:00,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:00,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:00,758 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:00,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:12:00,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:12:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:12:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:12:00,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:12:00,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69727121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:00,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:00,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-18 20:12:00,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3834129] [2022-11-18 20:12:00,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:00,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:12:00,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:00,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:12:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:12:00,900 INFO L87 Difference]: Start difference. First operand 211 states and 309 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-11-18 20:12:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:01,161 INFO L93 Difference]: Finished difference Result 320 states and 450 transitions. [2022-11-18 20:12:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:12:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) Word has length 22 [2022-11-18 20:12:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:01,163 INFO L225 Difference]: With dead ends: 320 [2022-11-18 20:12:01,163 INFO L226 Difference]: Without dead ends: 308 [2022-11-18 20:12:01,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:12:01,164 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:01,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 74 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:12:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-18 20:12:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 228. [2022-11-18 20:12:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.4449339207048457) internal successors, (328), 227 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 328 transitions. [2022-11-18 20:12:01,282 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 328 transitions. Word has length 22 [2022-11-18 20:12:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:01,283 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 328 transitions. [2022-11-18 20:12:01,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-11-18 20:12:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 328 transitions. [2022-11-18 20:12:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 20:12:01,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:01,284 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:01,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:01,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:12:01,490 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:12:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1486463737, now seen corresponding path program 3 times [2022-11-18 20:12:01,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:01,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408783138] [2022-11-18 20:12:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:01,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:01,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:01,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408783138] [2022-11-18 20:12:01,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408783138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:01,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617302585] [2022-11-18 20:12:01,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:12:01,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:01,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:01,729 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:01,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:12:01,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:12:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:12:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:01,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617302585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:02,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:02,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-18 20:12:02,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839458617] [2022-11-18 20:12:02,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:02,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:12:02,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:12:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:12:02,282 INFO L87 Difference]: Start difference. First operand 228 states and 328 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:25,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:25,959 INFO L93 Difference]: Finished difference Result 808 states and 1306 transitions. [2022-11-18 20:12:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:12:25,960 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 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 22 [2022-11-18 20:12:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:25,963 INFO L225 Difference]: With dead ends: 808 [2022-11-18 20:12:25,963 INFO L226 Difference]: Without dead ends: 736 [2022-11-18 20:12:25,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1363, Invalid=3059, Unknown=0, NotChecked=0, Total=4422 [2022-11-18 20:12:25,965 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1361 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:25,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 686 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-18 20:12:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-18 20:12:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 347. [2022-11-18 20:12:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.5057803468208093) internal successors, (521), 346 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 521 transitions. [2022-11-18 20:12:26,202 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 521 transitions. Word has length 22 [2022-11-18 20:12:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:26,203 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 521 transitions. [2022-11-18 20:12:26,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 521 transitions. [2022-11-18 20:12:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:12:26,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:26,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:26,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:26,412 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:12:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash -11866489, now seen corresponding path program 4 times [2022-11-18 20:12:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:26,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100218170] [2022-11-18 20:12:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:12:27,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:27,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100218170] [2022-11-18 20:12:27,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100218170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:27,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628481062] [2022-11-18 20:12:27,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:12:27,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:27,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:27,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:27,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:12:27,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:12:27,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-18 20:12:27,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:12:27,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:12:28,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628481062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:28,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:28,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 10] total 30 [2022-11-18 20:12:28,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462865543] [2022-11-18 20:12:28,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:28,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:12:28,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:12:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:12:28,070 INFO L87 Difference]: Start difference. First operand 347 states and 521 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:29,832 INFO L93 Difference]: Finished difference Result 445 states and 632 transitions. [2022-11-18 20:12:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:12:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2022-11-18 20:12:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:29,835 INFO L225 Difference]: With dead ends: 445 [2022-11-18 20:12:29,835 INFO L226 Difference]: Without dead ends: 360 [2022-11-18 20:12:29,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:12:29,837 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:29,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 80 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:12:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-18 20:12:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 317. [2022-11-18 20:12:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.4841772151898733) internal successors, (469), 316 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 469 transitions. [2022-11-18 20:12:30,029 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 469 transitions. Word has length 24 [2022-11-18 20:12:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:30,029 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 469 transitions. [2022-11-18 20:12:30,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 469 transitions. [2022-11-18 20:12:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:12:30,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:30,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:30,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:30,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:30,237 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:12:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash -147642777, now seen corresponding path program 4 times [2022-11-18 20:12:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:30,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838105083] [2022-11-18 20:12:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:30,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:30,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838105083] [2022-11-18 20:12:30,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838105083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071720780] [2022-11-18 20:12:30,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:12:30,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:30,534 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:30,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:12:30,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:12:30,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:12:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:12:30,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:12:30,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071720780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:30,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:30,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-11-18 20:12:30,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461903428] [2022-11-18 20:12:30,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:30,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:12:30,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:30,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:12:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:12:30,805 INFO L87 Difference]: Start difference. First operand 317 states and 469 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:36,813 INFO L93 Difference]: Finished difference Result 868 states and 1229 transitions. [2022-11-18 20:12:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-18 20:12:36,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2022-11-18 20:12:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:36,816 INFO L225 Difference]: With dead ends: 868 [2022-11-18 20:12:36,816 INFO L226 Difference]: Without dead ends: 794 [2022-11-18 20:12:36,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2022-11-18 20:12:36,820 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 430 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:36,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 320 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 20:12:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-18 20:12:37,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 365. [2022-11-18 20:12:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.4945054945054945) internal successors, (544), 364 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 544 transitions. [2022-11-18 20:12:37,162 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 544 transitions. Word has length 24 [2022-11-18 20:12:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:37,162 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 544 transitions. [2022-11-18 20:12:37,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:37,163 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 544 transitions. [2022-11-18 20:12:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 20:12:37,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:37,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:37,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-18 20:12:37,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:37,370 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:12:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 5 times [2022-11-18 20:12:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67919842] [2022-11-18 20:12:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:37,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:12:37,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67919842] [2022-11-18 20:12:37,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67919842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145658777] [2022-11-18 20:12:37,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:12:37,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:37,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:37,599 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:37,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:12:37,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 20:12:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:37,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:12:37,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:12:37,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:12:37,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145658777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:37,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:37,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-11-18 20:12:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904101596] [2022-11-18 20:12:37,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:37,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:12:37,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:12:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:12:37,891 INFO L87 Difference]: Start difference. First operand 365 states and 544 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:38,835 INFO L93 Difference]: Finished difference Result 614 states and 883 transitions. [2022-11-18 20:12:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:12:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 20:12:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:38,838 INFO L225 Difference]: With dead ends: 614 [2022-11-18 20:12:38,839 INFO L226 Difference]: Without dead ends: 587 [2022-11-18 20:12:38,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:12:38,840 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 128 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:38,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 145 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:12:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-18 20:12:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 368. [2022-11-18 20:12:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.4822888283378746) internal successors, (544), 367 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 544 transitions. [2022-11-18 20:12:39,123 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 544 transitions. Word has length 26 [2022-11-18 20:12:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:39,124 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 544 transitions. [2022-11-18 20:12:39,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 544 transitions. [2022-11-18 20:12:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 20:12:39,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:39,125 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:39,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:39,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:12:39,332 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:12:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash -833380899, now seen corresponding path program 5 times [2022-11-18 20:12:39,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:39,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451511426] [2022-11-18 20:12:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:39,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:39,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451511426] [2022-11-18 20:12:39,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451511426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551300310] [2022-11-18 20:12:39,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:12:39,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:39,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:39,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:39,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:12:39,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:12:39,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:39,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:12:39,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:40,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:40,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551300310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:40,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:40,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 14] total 33 [2022-11-18 20:12:40,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958482221] [2022-11-18 20:12:40,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:40,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:12:40,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:12:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:12:40,581 INFO L87 Difference]: Start difference. First operand 368 states and 544 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 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) [2022-11-18 20:13:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:14,371 INFO L93 Difference]: Finished difference Result 1121 states and 1646 transitions. [2022-11-18 20:13:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-11-18 20:13:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 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 27 [2022-11-18 20:13:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:14,380 INFO L225 Difference]: With dead ends: 1121 [2022-11-18 20:13:14,380 INFO L226 Difference]: Without dead ends: 1044 [2022-11-18 20:13:14,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17148 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=8385, Invalid=34257, Unknown=0, NotChecked=0, Total=42642 [2022-11-18 20:13:14,390 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1163 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:14,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 576 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-18 20:13:14,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-11-18 20:13:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 436. [2022-11-18 20:13:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.4896551724137932) internal successors, (648), 435 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 648 transitions. [2022-11-18 20:13:14,821 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 648 transitions. Word has length 27 [2022-11-18 20:13:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:14,822 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 648 transitions. [2022-11-18 20:13:14,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 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) [2022-11-18 20:13:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 648 transitions. [2022-11-18 20:13:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:13:14,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:14,823 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:14,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:15,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:13:15,029 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:15,029 INFO L85 PathProgramCache]: Analyzing trace with hash 83199046, now seen corresponding path program 6 times [2022-11-18 20:13:15,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:15,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493875996] [2022-11-18 20:13:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:15,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:13:15,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493875996] [2022-11-18 20:13:15,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493875996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442591685] [2022-11-18 20:13:15,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:13:15,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:15,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:15,326 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:15,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:13:15,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 20:13:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:15,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:13:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:13:15,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:13:15,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442591685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:15,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:15,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-11-18 20:13:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678978307] [2022-11-18 20:13:15,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:15,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 20:13:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 20:13:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:13:15,982 INFO L87 Difference]: Start difference. First operand 436 states and 648 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:32,198 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296))) is different from false [2022-11-18 20:14:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:49,452 INFO L93 Difference]: Finished difference Result 1186 states and 1868 transitions. [2022-11-18 20:14:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-18 20:14:49,453 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2022-11-18 20:14:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:49,457 INFO L225 Difference]: With dead ends: 1186 [2022-11-18 20:14:49,458 INFO L226 Difference]: Without dead ends: 1040 [2022-11-18 20:14:49,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7120 ImplicationChecksByTransitivity, 83.1s TimeCoverageRelationStatistics Valid=5072, Invalid=14113, Unknown=1, NotChecked=274, Total=19460 [2022-11-18 20:14:49,461 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1283 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:49,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 896 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 1610 Invalid, 0 Unknown, 2 Unchecked, 9.5s Time] [2022-11-18 20:14:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-11-18 20:14:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 522. [2022-11-18 20:14:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.489443378119002) internal successors, (776), 521 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 776 transitions. [2022-11-18 20:14:49,907 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 776 transitions. Word has length 28 [2022-11-18 20:14:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:49,907 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 776 transitions. [2022-11-18 20:14:49,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 776 transitions. [2022-11-18 20:14:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:14:49,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:49,909 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:14:49,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:14:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:14:50,114 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:50,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash 796082573, now seen corresponding path program 6 times [2022-11-18 20:14:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292082682] [2022-11-18 20:14:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 20:14:50,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:50,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292082682] [2022-11-18 20:14:50,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292082682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:14:50,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306838108] [2022-11-18 20:14:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:14:50,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:50,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:14:50,403 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:14:50,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:14:50,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 20:14:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:14:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:14:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:14:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 20:14:50,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:14:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 20:14:51,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306838108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:14:51,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:14:51,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-11-18 20:14:51,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632072202] [2022-11-18 20:14:51,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:14:51,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:14:51,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:14:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:14:51,139 INFO L87 Difference]: Start difference. First operand 522 states and 776 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 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) [2022-11-18 20:15:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:15:06,736 INFO L93 Difference]: Finished difference Result 931 states and 1350 transitions. [2022-11-18 20:15:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-18 20:15:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-18 20:15:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:15:06,742 INFO L225 Difference]: With dead ends: 931 [2022-11-18 20:15:06,742 INFO L226 Difference]: Without dead ends: 761 [2022-11-18 20:15:06,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1175, Invalid=16647, Unknown=0, NotChecked=0, Total=17822 [2022-11-18 20:15:06,745 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 363 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:15:06,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 441 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-18 20:15:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-11-18 20:15:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 575. [2022-11-18 20:15:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.461672473867596) internal successors, (839), 574 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 839 transitions. [2022-11-18 20:15:07,602 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 839 transitions. Word has length 29 [2022-11-18 20:15:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:15:07,603 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 839 transitions. [2022-11-18 20:15:07,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 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) [2022-11-18 20:15:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 839 transitions. [2022-11-18 20:15:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:15:07,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:15:07,604 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:15:07,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:15:07,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:15:07,810 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:15:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:15:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 7 times [2022-11-18 20:15:07,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:15:07,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020204589] [2022-11-18 20:15:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:15:07,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:15:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:15:08,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:15:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020204589] [2022-11-18 20:15:08,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020204589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:15:08,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032215063] [2022-11-18 20:15:08,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:15:08,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:15:08,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:15:08,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:15:08,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:15:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 20:15:08,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:15:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:15:14,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:15:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:15:15,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032215063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:15:15,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:15:15,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 48 [2022-11-18 20:15:15,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510630955] [2022-11-18 20:15:15,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:15:15,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:15:15,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:15:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:15:15,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1935, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:15:15,503 INFO L87 Difference]: Start difference. First operand 575 states and 839 transitions. Second operand has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 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) [2022-11-18 20:15:19,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:15:22,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:15:24,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:15:28,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:15:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:15:36,329 INFO L93 Difference]: Finished difference Result 947 states and 1283 transitions. [2022-11-18 20:15:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 20:15:36,329 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 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 30 [2022-11-18 20:15:36,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:15:36,331 INFO L225 Difference]: With dead ends: 947 [2022-11-18 20:15:36,331 INFO L226 Difference]: Without dead ends: 833 [2022-11-18 20:15:36,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1342, Invalid=7588, Unknown=0, NotChecked=0, Total=8930 [2022-11-18 20:15:36,332 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 320 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 265 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:15:36,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 215 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1120 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2022-11-18 20:15:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-11-18 20:15:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 578. [2022-11-18 20:15:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.4488734835355286) internal successors, (836), 577 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 836 transitions. [2022-11-18 20:15:36,962 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 836 transitions. Word has length 30 [2022-11-18 20:15:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:15:36,962 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 836 transitions. [2022-11-18 20:15:36,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 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) [2022-11-18 20:15:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 836 transitions. [2022-11-18 20:15:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:15:36,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:15:36,964 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:15:36,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:15:37,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:15:37,169 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:15:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:15:37,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1893940903, now seen corresponding path program 7 times [2022-11-18 20:15:37,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:15:37,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482299357] [2022-11-18 20:15:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:15:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:15:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:15:37,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:15:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482299357] [2022-11-18 20:15:37,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482299357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:15:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124411750] [2022-11-18 20:15:37,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:15:37,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:15:37,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:15:37,541 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:15:37,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:15:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:15:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:15:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 20:15:37,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:15:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 20:15:37,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124411750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:15:37,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:15:37,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-18 20:15:37,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558816506] [2022-11-18 20:15:37,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:15:37,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:15:37,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:15:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:15:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:15:37,883 INFO L87 Difference]: Start difference. First operand 578 states and 836 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:16:09,084 INFO L93 Difference]: Finished difference Result 1572 states and 2147 transitions. [2022-11-18 20:16:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-11-18 20:16:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 30 [2022-11-18 20:16:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:16:09,089 INFO L225 Difference]: With dead ends: 1572 [2022-11-18 20:16:09,089 INFO L226 Difference]: Without dead ends: 1487 [2022-11-18 20:16:09,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23387 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=3138, Invalid=54702, Unknown=0, NotChecked=0, Total=57840 [2022-11-18 20:16:09,093 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 774 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 3217 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 3721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 3217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:16:09,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 633 Invalid, 3721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 3217 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-18 20:16:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-11-18 20:16:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 649. [2022-11-18 20:16:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.4583333333333333) internal successors, (945), 648 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 945 transitions. [2022-11-18 20:16:10,053 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 945 transitions. Word has length 30 [2022-11-18 20:16:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:16:10,054 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 945 transitions. [2022-11-18 20:16:10,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 945 transitions. [2022-11-18 20:16:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:16:10,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:16:10,055 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:16:10,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:16:10,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:10,256 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:16:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:16:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -878244744, now seen corresponding path program 8 times [2022-11-18 20:16:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:16:10,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193660794] [2022-11-18 20:16:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:16:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:16:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:16:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:16:10,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:16:10,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193660794] [2022-11-18 20:16:10,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193660794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:16:10,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30804982] [2022-11-18 20:16:10,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:16:10,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:16:10,645 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:16:10,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:16:10,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:16:10,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:16:10,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 20:16:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:16:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:16:10,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:16:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:16:10,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30804982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:16:10,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:16:10,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 4] total 20 [2022-11-18 20:16:10,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083013595] [2022-11-18 20:16:10,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:16:10,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:16:10,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:16:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:16:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:16:10,890 INFO L87 Difference]: Start difference. First operand 649 states and 945 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) [2022-11-18 20:16:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:16:14,369 INFO L93 Difference]: Finished difference Result 1013 states and 1485 transitions. [2022-11-18 20:16:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 20:16:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-18 20:16:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:16:14,375 INFO L225 Difference]: With dead ends: 1013 [2022-11-18 20:16:14,375 INFO L226 Difference]: Without dead ends: 895 [2022-11-18 20:16:14,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:16:14,377 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 101 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:16:14,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1107 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:16:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-18 20:16:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 709. [2022-11-18 20:16:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.423728813559322) internal successors, (1008), 708 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1008 transitions. [2022-11-18 20:16:15,383 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1008 transitions. Word has length 30 [2022-11-18 20:16:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:16:15,384 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 1008 transitions. [2022-11-18 20:16:15,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) [2022-11-18 20:16:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1008 transitions. [2022-11-18 20:16:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-18 20:16:15,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:16:15,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:16:15,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:16:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:15,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:16:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:16:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 9 times [2022-11-18 20:16:15,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:16:15,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269700293] [2022-11-18 20:16:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:16:15,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:16:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:16:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 20:16:15,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:16:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269700293] [2022-11-18 20:16:15,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269700293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:16:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231470647] [2022-11-18 20:16:15,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:16:15,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:16:15,899 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:16:15,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:16:16,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:16:16,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:16:16,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:16:16,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:16:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 20:16:16,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:16:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 20:16:16,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231470647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:16:16,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:16:16,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-18 20:16:16,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943139212] [2022-11-18 20:16:16,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:16:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:16:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:16:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:16:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:16:16,258 INFO L87 Difference]: Start difference. First operand 709 states and 1008 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-11-18 20:16:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:16:19,217 INFO L93 Difference]: Finished difference Result 1195 states and 1648 transitions. [2022-11-18 20:16:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:16:19,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-18 20:16:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:16:19,221 INFO L225 Difference]: With dead ends: 1195 [2022-11-18 20:16:19,222 INFO L226 Difference]: Without dead ends: 1163 [2022-11-18 20:16:19,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:16:19,223 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 202 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:16:19,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 231 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:16:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-11-18 20:16:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 726. [2022-11-18 20:16:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.4151724137931034) internal successors, (1026), 725 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1026 transitions. [2022-11-18 20:16:20,053 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1026 transitions. Word has length 32 [2022-11-18 20:16:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:16:20,053 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1026 transitions. [2022-11-18 20:16:20,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-11-18 20:16:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1026 transitions. [2022-11-18 20:16:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-18 20:16:20,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:16:20,055 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:16:20,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:16:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:20,260 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:16:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:16:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash -404867559, now seen corresponding path program 3 times [2022-11-18 20:16:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:16:20,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870185118] [2022-11-18 20:16:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:16:20,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:16:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:16:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:16:20,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:16:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870185118] [2022-11-18 20:16:20,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870185118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:16:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746598873] [2022-11-18 20:16:20,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:16:20,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:20,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:16:20,483 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:16:20,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:16:20,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:16:20,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:16:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:16:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:16:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-18 20:16:20,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:16:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-18 20:16:20,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746598873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:16:20,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:16:20,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 22 [2022-11-18 20:16:20,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438472109] [2022-11-18 20:16:20,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:16:20,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:16:20,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:16:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:16:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:16:20,874 INFO L87 Difference]: Start difference. First operand 726 states and 1026 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:16:24,727 INFO L93 Difference]: Finished difference Result 1002 states and 1398 transitions. [2022-11-18 20:16:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 20:16:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2022-11-18 20:16:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:16:24,731 INFO L225 Difference]: With dead ends: 1002 [2022-11-18 20:16:24,731 INFO L226 Difference]: Without dead ends: 790 [2022-11-18 20:16:24,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=438, Invalid=4254, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 20:16:24,732 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 148 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:16:24,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 451 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:16:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-18 20:16:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 668. [2022-11-18 20:16:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.4077961019490255) internal successors, (939), 667 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 939 transitions. [2022-11-18 20:16:25,551 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 939 transitions. Word has length 32 [2022-11-18 20:16:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:16:25,551 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 939 transitions. [2022-11-18 20:16:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 939 transitions. [2022-11-18 20:16:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 20:16:25,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:16:25,553 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:16:25,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:16:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:25,763 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:16:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:16:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1396440605, now seen corresponding path program 8 times [2022-11-18 20:16:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:16:25,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256231235] [2022-11-18 20:16:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:16:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:16:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:16:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:16:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:16:26,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256231235] [2022-11-18 20:16:26,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256231235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:16:26,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435770397] [2022-11-18 20:16:26,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:16:26,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:26,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:16:26,256 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:16:26,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:16:26,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:16:26,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:16:26,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 20:16:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:16:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:16:26,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:16:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:16:26,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435770397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:16:26,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:16:26,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2022-11-18 20:16:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108082751] [2022-11-18 20:16:26,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:16:26,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:16:26,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:16:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:16:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:16:26,721 INFO L87 Difference]: Start difference. First operand 668 states and 939 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-11-18 20:17:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:17:36,312 INFO L93 Difference]: Finished difference Result 2049 states and 2693 transitions. [2022-11-18 20:17:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2022-11-18 20:17:36,312 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-18 20:17:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:17:36,320 INFO L225 Difference]: With dead ends: 2049 [2022-11-18 20:17:36,320 INFO L226 Difference]: Without dead ends: 1964 [2022-11-18 20:17:36,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49767 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=5237, Invalid=112069, Unknown=0, NotChecked=0, Total=117306 [2022-11-18 20:17:36,325 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1171 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 4891 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 5746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 4891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:17:36,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 814 Invalid, 5746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 4891 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-18 20:17:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-11-18 20:17:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 770. [2022-11-18 20:17:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.4031209362808843) internal successors, (1079), 769 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:17:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1079 transitions. [2022-11-18 20:17:37,482 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1079 transitions. Word has length 33 [2022-11-18 20:17:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:17:37,482 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1079 transitions. [2022-11-18 20:17:37,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-11-18 20:17:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1079 transitions. [2022-11-18 20:17:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 20:17:37,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:17:37,485 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:17:37,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-18 20:17:37,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:17:37,690 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:17:37,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:17:37,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1904311911, now seen corresponding path program 10 times [2022-11-18 20:17:37,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:17:37,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293173287] [2022-11-18 20:17:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:17:37,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:17:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:17:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:17:38,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:17:38,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293173287] [2022-11-18 20:17:38,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293173287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:17:38,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905827079] [2022-11-18 20:17:38,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:17:38,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:17:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:17:38,151 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:17:38,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:17:38,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:17:38,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:17:38,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:17:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:17:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:17:38,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:17:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:17:38,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905827079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:17:38,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:17:38,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 8] total 29 [2022-11-18 20:17:38,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084405629] [2022-11-18 20:17:38,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:17:38,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:17:38,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:17:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:17:38,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:17:38,734 INFO L87 Difference]: Start difference. First operand 770 states and 1079 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:17:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:17:46,151 INFO L93 Difference]: Finished difference Result 1287 states and 1816 transitions. [2022-11-18 20:17:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-18 20:17:46,151 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-18 20:17:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:17:46,155 INFO L225 Difference]: With dead ends: 1287 [2022-11-18 20:17:46,155 INFO L226 Difference]: Without dead ends: 1136 [2022-11-18 20:17:46,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=926, Invalid=10846, Unknown=0, NotChecked=0, Total=11772 [2022-11-18 20:17:46,157 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 180 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 3063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:17:46,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 827 Invalid, 3063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 20:17:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-18 20:17:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 811. [2022-11-18 20:17:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 1.4037037037037037) internal successors, (1137), 810 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:17:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1137 transitions. [2022-11-18 20:17:47,358 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1137 transitions. Word has length 34 [2022-11-18 20:17:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:17:47,359 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1137 transitions. [2022-11-18 20:17:47,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:17:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1137 transitions. [2022-11-18 20:17:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 20:17:47,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:17:47,360 INFO L195 NwaCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:17:47,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:17:47,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:17:47,561 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:17:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:17:47,561 INFO L85 PathProgramCache]: Analyzing trace with hash 286879148, now seen corresponding path program 4 times [2022-11-18 20:17:47,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:17:47,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751377619] [2022-11-18 20:17:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:17:47,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:17:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:17:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:17:48,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:17:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751377619] [2022-11-18 20:17:48,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751377619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:17:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405251691] [2022-11-18 20:17:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:17:48,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:17:48,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:17:48,232 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:17:48,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91719f4-9fbc-4116-9c5a-8ea043f7d885/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:17:48,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:17:48,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:17:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-18 20:17:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:17:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:17:48,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:17:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:17:49,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405251691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:17:49,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:17:49,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-11-18 20:17:49,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088361319] [2022-11-18 20:17:49,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:17:49,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 20:17:49,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:17:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 20:17:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:17:49,693 INFO L87 Difference]: Start difference. First operand 811 states and 1137 transitions. Second operand has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:13,713 WARN L233 SmtUtils]: Spent 46.52s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:19:16,253 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296))) is different from false [2022-11-18 20:19:18,446 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296))) is different from false [2022-11-18 20:20:09,783 WARN L233 SmtUtils]: Spent 30.25s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:21:00,440 WARN L233 SmtUtils]: Spent 25.80s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:21:54,328 WARN L233 SmtUtils]: Spent 33.27s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:22:50,320 WARN L233 SmtUtils]: Spent 30.85s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:23:49,969 WARN L233 SmtUtils]: Spent 32.26s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:24:28,344 WARN L233 SmtUtils]: Spent 20.93s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:25:41,578 WARN L233 SmtUtils]: Spent 43.33s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:26:32,735 WARN L233 SmtUtils]: Spent 24.73s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)