./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 d1c5dbef70eb17e658ce13a53ba3c925aaef4da45bcaa9e57399f7ada50ab560 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:43,133 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:43,242 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:43,254 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:43,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:43,303 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:43,305 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:43,305 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:43,307 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:43,312 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:43,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:43,313 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:43,314 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:43,316 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:43,316 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:43,317 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:43,317 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:43,318 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:43,318 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:43,319 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:43,319 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:43,320 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:43,321 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:43,321 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:43,322 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:43,322 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:43,323 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:43,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:43,324 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:43,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:43,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:43,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:43,327 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:43,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:43,328 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:43,329 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:43,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:43,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:43,331 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:43,331 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:43,331 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:43,332 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:43,332 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1c5dbef70eb17e658ce13a53ba3c925aaef4da45bcaa9e57399f7ada50ab560 [2023-11-26 11:55:43,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:43,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:43,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:43,758 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:43,759 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:43,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2023-11-26 11:55:46,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:47,145 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:47,146 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2023-11-26 11:55:47,155 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/data/2b95ec708/07282836c7c545dea35fc745e9ac47cd/FLAGbe46e2bd8 [2023-11-26 11:55:47,169 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/data/2b95ec708/07282836c7c545dea35fc745e9ac47cd [2023-11-26 11:55:47,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:47,173 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:47,175 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:47,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:47,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:47,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c3abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47, skipping insertion in model container [2023-11-26 11:55:47,184 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,206 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:47,398 WARN L240 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_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c[331,344] [2023-11-26 11:55:47,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:47,429 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:47,441 WARN L240 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_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c[331,344] [2023-11-26 11:55:47,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:47,472 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:47,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47 WrapperNode [2023-11-26 11:55:47,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:47,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:47,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:47,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:47,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,510 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2023-11-26 11:55:47,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:47,511 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:47,511 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:47,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:47,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,525 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,553 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-11-26 11:55:47,553 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,554 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,559 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:47,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:47,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:47,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:47,577 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (1/1) ... [2023-11-26 11:55:47,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:47,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:47,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:55:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:55:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:55:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:55:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:47,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:55:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:55:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:55:47,794 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:47,797 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:48,045 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:48,100 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:48,101 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:55:48,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:48 BoogieIcfgContainer [2023-11-26 11:55:48,101 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:48,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:48,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:48,108 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:48,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:47" (1/3) ... [2023-11-26 11:55:48,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffb47bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:48, skipping insertion in model container [2023-11-26 11:55:48,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:47" (2/3) ... [2023-11-26 11:55:48,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffb47bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:48, skipping insertion in model container [2023-11-26 11:55:48,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:48" (3/3) ... [2023-11-26 11:55:48,115 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_2.c [2023-11-26 11:55:48,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:48,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:55:48,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:48,201 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=LoopHeads, 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;@14e8144c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:48,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:55:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 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) [2023-11-26 11:55:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:55:48,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:48,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:48,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:48,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash -245393117, now seen corresponding path program 1 times [2023-11-26 11:55:48,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:48,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663318771] [2023-11-26 11:55:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:48,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:48,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:48,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874575595] [2023-11-26 11:55:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:48,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:48,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:48,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:48,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:48,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:55:48,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:48,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:48,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:48,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663318771] [2023-11-26 11:55:48,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:48,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874575595] [2023-11-26 11:55:48,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874575595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:48,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:48,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:55:48,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931794358] [2023-11-26 11:55:48,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:48,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:55:48,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:55:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:55:48,530 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:48,551 INFO L93 Difference]: Finished difference Result 34 states and 49 transitions. [2023-11-26 11:55:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:55:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 11:55:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:48,560 INFO L225 Difference]: With dead ends: 34 [2023-11-26 11:55:48,560 INFO L226 Difference]: Without dead ends: 16 [2023-11-26 11:55:48,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:55:48,567 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:48,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:55:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-26 11:55:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-26 11:55:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2023-11-26 11:55:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-26 11:55:48,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2023-11-26 11:55:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:48,606 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-26 11:55:48,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-26 11:55:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:55:48,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:48,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:48,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:48,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:55:48,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:48,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:48,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1639468179, now seen corresponding path program 1 times [2023-11-26 11:55:48,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:48,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641119633] [2023-11-26 11:55:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:48,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:48,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:48,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996962386] [2023-11-26 11:55:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:48,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:48,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:48,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:48,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:48,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:55:48,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:49,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:49,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:49,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641119633] [2023-11-26 11:55:49,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:49,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996962386] [2023-11-26 11:55:49,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996962386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:49,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:49,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:49,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774952306] [2023-11-26 11:55:49,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:49,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:49,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:49,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:49,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:49,036 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:49,114 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2023-11-26 11:55:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 11:55:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:49,118 INFO L225 Difference]: With dead ends: 41 [2023-11-26 11:55:49,118 INFO L226 Difference]: Without dead ends: 28 [2023-11-26 11:55:49,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:49,124 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:49,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-26 11:55:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2023-11-26 11:55:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-26 11:55:49,154 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2023-11-26 11:55:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:49,154 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-26 11:55:49,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-26 11:55:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:55:49,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:49,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:49,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:49,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 11:55:49,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:49,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash 563464204, now seen corresponding path program 1 times [2023-11-26 11:55:49,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:49,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475937056] [2023-11-26 11:55:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:49,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:49,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:49,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900229386] [2023-11-26 11:55:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:49,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:49,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:49,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:49,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:49,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:55:49,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:49,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:49,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475937056] [2023-11-26 11:55:49,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900229386] [2023-11-26 11:55:49,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900229386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:49,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:49,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-26 11:55:49,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035621218] [2023-11-26 11:55:49,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:49,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:55:49,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:55:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:49,654 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:49,796 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2023-11-26 11:55:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:55:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 11:55:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:49,798 INFO L225 Difference]: With dead ends: 67 [2023-11-26 11:55:49,798 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 11:55:49,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:49,800 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:49,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 33 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 11:55:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2023-11-26 11:55:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2023-11-26 11:55:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-11-26 11:55:49,809 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 15 [2023-11-26 11:55:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:49,810 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-11-26 11:55:49,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-11-26 11:55:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:55:49,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:49,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:49,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:50,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:50,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:50,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:50,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1188975981, now seen corresponding path program 1 times [2023-11-26 11:55:50,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:50,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420244925] [2023-11-26 11:55:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:50,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:50,038 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:50,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320464227] [2023-11-26 11:55:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:50,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:50,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:50,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:50,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:50,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:55:50,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:50,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:50,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:50,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420244925] [2023-11-26 11:55:50,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:50,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320464227] [2023-11-26 11:55:50,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320464227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:50,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:50,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-26 11:55:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907973586] [2023-11-26 11:55:50,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:50,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:55:50,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:55:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:55:50,488 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:50,829 INFO L93 Difference]: Finished difference Result 143 states and 183 transitions. [2023-11-26 11:55:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:55:50,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-26 11:55:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:50,835 INFO L225 Difference]: With dead ends: 143 [2023-11-26 11:55:50,835 INFO L226 Difference]: Without dead ends: 126 [2023-11-26 11:55:50,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:55:50,841 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 387 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:50,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 75 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:55:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-26 11:55:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 62. [2023-11-26 11:55:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-11-26 11:55:50,865 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 30 [2023-11-26 11:55:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:50,865 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-11-26 11:55:50,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-11-26 11:55:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 11:55:50,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:50,868 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:50,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:51,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:51,075 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:51,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:51,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2133521487, now seen corresponding path program 2 times [2023-11-26 11:55:51,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:51,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740956575] [2023-11-26 11:55:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:51,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:51,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493481121] [2023-11-26 11:55:51,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:51,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:51,107 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:51,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:55:51,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:55:51,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:51,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:55:51,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-26 11:55:51,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:51,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:51,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740956575] [2023-11-26 11:55:51,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:51,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493481121] [2023-11-26 11:55:51,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493481121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:51,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:51,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:51,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559663348] [2023-11-26 11:55:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:51,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:51,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:51,785 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:51,842 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2023-11-26 11:55:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:55:51,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-26 11:55:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:51,844 INFO L225 Difference]: With dead ends: 69 [2023-11-26 11:55:51,844 INFO L226 Difference]: Without dead ends: 67 [2023-11-26 11:55:51,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:55:51,845 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:51,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:55:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-26 11:55:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-26 11:55:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2023-11-26 11:55:51,856 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 60 [2023-11-26 11:55:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:51,857 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2023-11-26 11:55:51,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2023-11-26 11:55:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 11:55:51,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:51,859 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:51,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:52,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:52,065 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:52,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2133581069, now seen corresponding path program 1 times [2023-11-26 11:55:52,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:52,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431026127] [2023-11-26 11:55:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:52,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:52,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:52,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359254034] [2023-11-26 11:55:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:52,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:52,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:52,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:52,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:55:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:52,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:55:52,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:52,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:52,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:52,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431026127] [2023-11-26 11:55:52,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:52,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359254034] [2023-11-26 11:55:52,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359254034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:52,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:52,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-26 11:55:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438352407] [2023-11-26 11:55:52,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:52,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 11:55:52,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 11:55:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:55:52,844 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:53,546 INFO L93 Difference]: Finished difference Result 416 states and 523 transitions. [2023-11-26 11:55:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:55:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-26 11:55:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:53,549 INFO L225 Difference]: With dead ends: 416 [2023-11-26 11:55:53,549 INFO L226 Difference]: Without dead ends: 379 [2023-11-26 11:55:53,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-11-26 11:55:53,551 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 785 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:53,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 159 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:55:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-26 11:55:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 127. [2023-11-26 11:55:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2936507936507937) internal successors, (163), 126 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2023-11-26 11:55:53,571 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 60 [2023-11-26 11:55:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:53,571 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2023-11-26 11:55:53,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2023-11-26 11:55:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-26 11:55:53,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:53,574 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:53,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:53,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:53,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash 85478515, now seen corresponding path program 2 times [2023-11-26 11:55:53,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:53,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250411419] [2023-11-26 11:55:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:53,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:53,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:53,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616869538] [2023-11-26 11:55:53,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:53,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:53,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:53,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:55:54,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:55:54,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:54,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:55:54,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2023-11-26 11:55:54,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250411419] [2023-11-26 11:55:54,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616869538] [2023-11-26 11:55:54,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616869538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:54,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:54,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:55:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457231150] [2023-11-26 11:55:54,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:54,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:55:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:54,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:55:54,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:55:54,812 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:54,918 INFO L93 Difference]: Finished difference Result 134 states and 171 transitions. [2023-11-26 11:55:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:55:54,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2023-11-26 11:55:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:54,920 INFO L225 Difference]: With dead ends: 134 [2023-11-26 11:55:54,920 INFO L226 Difference]: Without dead ends: 132 [2023-11-26 11:55:54,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:54,921 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:54,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-26 11:55:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-26 11:55:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2900763358778626) internal successors, (169), 131 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 169 transitions. [2023-11-26 11:55:54,946 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 169 transitions. Word has length 120 [2023-11-26 11:55:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:54,947 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 169 transitions. [2023-11-26 11:55:54,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 169 transitions. [2023-11-26 11:55:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-26 11:55:54,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:54,958 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:54,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:55,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:55,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:55,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash 136217841, now seen corresponding path program 1 times [2023-11-26 11:55:55,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:55,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59492295] [2023-11-26 11:55:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:55,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:55,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:55,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033427290] [2023-11-26 11:55:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:55,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:55,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:55,213 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:55,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:55:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:55,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:55:55,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:55:56,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:55:57,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:57,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59492295] [2023-11-26 11:55:57,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:57,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033427290] [2023-11-26 11:55:57,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033427290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:57,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:57,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-11-26 11:55:57,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134995766] [2023-11-26 11:55:57,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:57,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-26 11:55:57,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-26 11:55:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2023-11-26 11:55:57,225 INFO L87 Difference]: Start difference. First operand 132 states and 169 transitions. Second operand has 50 states, 50 states have (on average 4.72) internal successors, (236), 49 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:59,466 INFO L93 Difference]: Finished difference Result 1081 states and 1347 transitions. [2023-11-26 11:55:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-26 11:55:59,467 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.72) internal successors, (236), 49 states have internal predecessors, (236), 0 states have call successors, (0), 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 125 [2023-11-26 11:55:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:59,475 INFO L225 Difference]: With dead ends: 1081 [2023-11-26 11:55:59,475 INFO L226 Difference]: Without dead ends: 1009 [2023-11-26 11:55:59,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2023-11-26 11:55:59,482 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2071 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:59,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2071 Valid, 330 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:55:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2023-11-26 11:55:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 252. [2023-11-26 11:55:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.294820717131474) internal successors, (325), 251 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 325 transitions. [2023-11-26 11:55:59,520 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 325 transitions. Word has length 125 [2023-11-26 11:55:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:59,521 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 325 transitions. [2023-11-26 11:55:59,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.72) internal successors, (236), 49 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 325 transitions. [2023-11-26 11:55:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-26 11:55:59,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:59,527 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:59,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:59,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:59,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:59,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:59,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1870176753, now seen corresponding path program 2 times [2023-11-26 11:55:59,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:59,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918002592] [2023-11-26 11:55:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:59,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:59,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:59,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758751629] [2023-11-26 11:55:59,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:59,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:59,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:59,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:59,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:56:00,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:56:00,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:00,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-26 11:56:00,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:56:02,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:56:05,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:05,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918002592] [2023-11-26 11:56:05,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:05,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758751629] [2023-11-26 11:56:05,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758751629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:05,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:05,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2023-11-26 11:56:05,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750404185] [2023-11-26 11:56:05,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:05,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-26 11:56:05,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-26 11:56:05,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2023-11-26 11:56:05,554 INFO L87 Difference]: Start difference. First operand 252 states and 325 transitions. Second operand has 98 states, 98 states have (on average 4.857142857142857) internal successors, (476), 97 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:14,398 INFO L93 Difference]: Finished difference Result 2197 states and 2739 transitions. [2023-11-26 11:56:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-26 11:56:14,399 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.857142857142857) internal successors, (476), 97 states have internal predecessors, (476), 0 states have call successors, (0), 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 245 [2023-11-26 11:56:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:14,410 INFO L225 Difference]: With dead ends: 2197 [2023-11-26 11:56:14,410 INFO L226 Difference]: Without dead ends: 2065 [2023-11-26 11:56:14,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2023-11-26 11:56:14,421 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4196 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4196 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:14,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4196 Valid, 666 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:56:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2023-11-26 11:56:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 492. [2023-11-26 11:56:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.2973523421588595) internal successors, (637), 491 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 637 transitions. [2023-11-26 11:56:14,468 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 637 transitions. Word has length 245 [2023-11-26 11:56:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:14,469 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 637 transitions. [2023-11-26 11:56:14,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.857142857142857) internal successors, (476), 97 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 637 transitions. [2023-11-26 11:56:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-11-26 11:56:14,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:14,480 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:14,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:14,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:56:14,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:14,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1325982735, now seen corresponding path program 3 times [2023-11-26 11:56:14,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:14,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577630115] [2023-11-26 11:56:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:14,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:14,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506661731] [2023-11-26 11:56:14,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:56:14,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:14,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:14,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:14,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:56:15,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:56:15,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:15,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:56:15,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2023-11-26 11:56:17,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2023-11-26 11:56:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577630115] [2023-11-26 11:56:20,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:20,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506661731] [2023-11-26 11:56:20,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506661731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:20,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:20,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-26 11:56:20,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255062427] [2023-11-26 11:56:20,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:20,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:56:20,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:20,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:56:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:56:20,287 INFO L87 Difference]: Start difference. First operand 492 states and 637 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:22,049 INFO L93 Difference]: Finished difference Result 514 states and 666 transitions. [2023-11-26 11:56:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:56:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 485 [2023-11-26 11:56:22,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:22,053 INFO L225 Difference]: With dead ends: 514 [2023-11-26 11:56:22,053 INFO L226 Difference]: Without dead ends: 512 [2023-11-26 11:56:22,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:56:22,055 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:22,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 68 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:56:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-11-26 11:56:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2023-11-26 11:56:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.2935420743639923) internal successors, (661), 511 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 661 transitions. [2023-11-26 11:56:22,118 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 661 transitions. Word has length 485 [2023-11-26 11:56:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:22,119 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 661 transitions. [2023-11-26 11:56:22,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 661 transitions. [2023-11-26 11:56:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-26 11:56:22,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:22,132 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:22,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:22,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:56:22,338 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:22,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:22,339 INFO L85 PathProgramCache]: Analyzing trace with hash -744079759, now seen corresponding path program 4 times [2023-11-26 11:56:22,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:22,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418400105] [2023-11-26 11:56:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:22,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:22,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:22,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566863704] [2023-11-26 11:56:22,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:56:22,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:22,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:22,419 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:22,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:56:22,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:56:22,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:22,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:56:22,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:22,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-26 11:56:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21184 trivial. 0 not checked. [2023-11-26 11:56:23,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21184 trivial. 0 not checked. [2023-11-26 11:56:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418400105] [2023-11-26 11:56:23,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566863704] [2023-11-26 11:56:23,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566863704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:23,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:23,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 11:56:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657905271] [2023-11-26 11:56:23,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:23,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:56:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:56:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:56:23,135 INFO L87 Difference]: Start difference. First operand 512 states and 661 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:23,405 INFO L93 Difference]: Finished difference Result 1079 states and 1386 transitions. [2023-11-26 11:56:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:56:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 505 [2023-11-26 11:56:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:23,409 INFO L225 Difference]: With dead ends: 1079 [2023-11-26 11:56:23,410 INFO L226 Difference]: Without dead ends: 574 [2023-11-26 11:56:23,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:56:23,415 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:23,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 96 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:56:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-11-26 11:56:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 512. [2023-11-26 11:56:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.2857142857142858) internal successors, (657), 511 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 657 transitions. [2023-11-26 11:56:23,477 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 657 transitions. Word has length 505 [2023-11-26 11:56:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:23,477 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 657 transitions. [2023-11-26 11:56:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 657 transitions. [2023-11-26 11:56:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-26 11:56:23,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:23,482 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:23,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:23,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:56:23,691 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:23,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1045013519, now seen corresponding path program 1 times [2023-11-26 11:56:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114441093] [2023-11-26 11:56:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:23,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:23,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136094516] [2023-11-26 11:56:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:23,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:23,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80cfae5-3c90-4417-a085-7c2e82ee9ed9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:56:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:24,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-26 11:56:24,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-26 11:56:30,749 INFO L327 TraceCheckSpWp]: Computing backward predicates...