./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ --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 ba821d92d2796d52ea5c7f089d2638cf5b82e930c6cce78adee479c044ea4833 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:36:31,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:36:31,937 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:36:31,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:36:31,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:36:31,994 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:36:31,995 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:36:31,995 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:36:31,996 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:36:32,001 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:36:32,003 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:36:32,003 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:36:32,004 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:36:32,006 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:36:32,006 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:36:32,007 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:36:32,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:36:32,008 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:36:32,008 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:36:32,009 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:36:32,010 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:36:32,011 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:36:32,011 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:36:32,012 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:36:32,012 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:36:32,013 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:36:32,013 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:36:32,014 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:36:32,015 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:36:32,015 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:36:32,016 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:36:32,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:36:32,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:36:32,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:36:32,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:36:32,018 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:36:32,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:36:32,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:36:32,019 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:36:32,019 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:36:32,019 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:36:32,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:36:32,020 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_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba821d92d2796d52ea5c7f089d2638cf5b82e930c6cce78adee479c044ea4833 [2023-11-23 22:36:32,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:36:32,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:36:32,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:36:32,315 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:36:32,315 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:36:32,317 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i [2023-11-23 22:36:35,415 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:36:35,702 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:36:35,707 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i [2023-11-23 22:36:35,724 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/data/c8f1f0c26/d34f1493569641399568ec3a21f21f30/FLAG2b72fdbaf [2023-11-23 22:36:35,739 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/data/c8f1f0c26/d34f1493569641399568ec3a21f21f30 [2023-11-23 22:36:35,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:36:35,744 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:36:35,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:36:35,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:36:35,751 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:36:35,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:36:35" (1/1) ... [2023-11-23 22:36:35,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a79e856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:35, skipping insertion in model container [2023-11-23 22:36:35,753 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:36:35" (1/1) ... [2023-11-23 22:36:35,815 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:36:36,002 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_f6d040df-2b33-4a79-863c-0c2acc635597/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i[916,929] [2023-11-23 22:36:36,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:36:36,240 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:36:36,254 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_f6d040df-2b33-4a79-863c-0c2acc635597/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i[916,929] [2023-11-23 22:36:36,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:36:36,389 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:36:36,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36 WrapperNode [2023-11-23 22:36:36,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:36:36,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:36:36,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:36:36,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:36:36,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,520 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 380 [2023-11-23 22:36:36,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:36:36,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:36:36,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:36:36,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:36:36,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,544 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,646 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:36:36,646 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,713 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,719 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,725 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:36:36,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:36:36,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:36:36,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:36:36,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (1/1) ... [2023-11-23 22:36:36,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:36:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:36,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:36:36,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:36:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:36:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:36:36,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:36:36,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:36:36,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:36:36,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:36:36,985 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:36:36,987 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:36:37,902 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:36:37,961 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:36:37,962 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:36:37,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:36:37 BoogieIcfgContainer [2023-11-23 22:36:37,962 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:36:37,964 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:36:37,965 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:36:37,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:36:37,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:36:35" (1/3) ... [2023-11-23 22:36:37,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a798541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:36:37, skipping insertion in model container [2023-11-23 22:36:37,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:36" (2/3) ... [2023-11-23 22:36:37,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a798541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:36:37, skipping insertion in model container [2023-11-23 22:36:37,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:36:37" (3/3) ... [2023-11-23 22:36:37,971 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-37.i [2023-11-23 22:36:37,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:36:37,992 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:36:38,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:36:38,073 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;@234c79fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:36:38,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:36:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 98 states have (on average 1.510204081632653) internal successors, (148), 99 states have internal predecessors, (148), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 22:36:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-23 22:36:38,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:36:38,103 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:38,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:36:38,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1627092463, now seen corresponding path program 1 times [2023-11-23 22:36:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:38,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564938327] [2023-11-23 22:36:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:38,450 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:36:38,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565911751] [2023-11-23 22:36:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:38,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:38,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:38,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:38,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:36:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:38,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:36:38,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 768 proven. 0 refuted. 0 times theorem prover too weak. 4332 trivial. 0 not checked. [2023-11-23 22:36:42,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:36:42,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:42,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564938327] [2023-11-23 22:36:42,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:36:42,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565911751] [2023-11-23 22:36:42,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565911751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:42,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:42,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:36:42,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419765599] [2023-11-23 22:36:42,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:42,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:36:42,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:42,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:36:42,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:36:42,175 INFO L87 Difference]: Start difference. First operand has 152 states, 98 states have (on average 1.510204081632653) internal successors, (148), 99 states have internal predecessors, (148), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2023-11-23 22:36:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:36:42,897 INFO L93 Difference]: Finished difference Result 482 states and 901 transitions. [2023-11-23 22:36:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:36:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 329 [2023-11-23 22:36:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:36:42,931 INFO L225 Difference]: With dead ends: 482 [2023-11-23 22:36:42,931 INFO L226 Difference]: Without dead ends: 331 [2023-11-23 22:36:42,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:36:42,941 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 605 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:36:42,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 774 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:36:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-23 22:36:43,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 296. [2023-11-23 22:36:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 191 states have (on average 1.4712041884816753) internal successors, (281), 191 states have internal predecessors, (281), 102 states have call successors, (102), 2 states have call predecessors, (102), 2 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-23 22:36:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 485 transitions. [2023-11-23 22:36:43,085 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 485 transitions. Word has length 329 [2023-11-23 22:36:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:36:43,088 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 485 transitions. [2023-11-23 22:36:43,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2023-11-23 22:36:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 485 transitions. [2023-11-23 22:36:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-23 22:36:43,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:36:43,098 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:43,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:43,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:36:43,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:36:43,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash 673730127, now seen corresponding path program 1 times [2023-11-23 22:36:43,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:43,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658594213] [2023-11-23 22:36:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:43,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:36:43,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186843496] [2023-11-23 22:36:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:43,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:43,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:43,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:43,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:36:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:43,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:36:43,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-23 22:36:43,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:36:43,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:43,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658594213] [2023-11-23 22:36:43,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:36:43,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186843496] [2023-11-23 22:36:43,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186843496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:36:43,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:36:43,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:36:43,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982501421] [2023-11-23 22:36:43,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:36:43,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:36:43,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:36:43,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:36:43,928 INFO L87 Difference]: Start difference. First operand 296 states and 485 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-23 22:36:44,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:36:44,479 INFO L93 Difference]: Finished difference Result 1456 states and 2365 transitions. [2023-11-23 22:36:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:36:44,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 329 [2023-11-23 22:36:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:36:44,495 INFO L225 Difference]: With dead ends: 1456 [2023-11-23 22:36:44,496 INFO L226 Difference]: Without dead ends: 1161 [2023-11-23 22:36:44,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:36:44,502 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 694 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:36:44,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1205 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:36:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2023-11-23 22:36:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 983. [2023-11-23 22:36:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 722 states have (on average 1.5096952908587258) internal successors, (1090), 726 states have internal predecessors, (1090), 252 states have call successors, (252), 8 states have call predecessors, (252), 8 states have return successors, (252), 248 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-23 22:36:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1594 transitions. [2023-11-23 22:36:44,695 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1594 transitions. Word has length 329 [2023-11-23 22:36:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:36:44,699 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1594 transitions. [2023-11-23 22:36:44,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-23 22:36:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1594 transitions. [2023-11-23 22:36:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-23 22:36:44,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:36:44,740 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:44,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:44,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:44,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:36:44,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2093970959, now seen corresponding path program 1 times [2023-11-23 22:36:44,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:44,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329238407] [2023-11-23 22:36:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:44,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:45,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:36:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272156178] [2023-11-23 22:36:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:45,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:45,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:45,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:36:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:45,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:36:45,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1898 proven. 114 refuted. 0 times theorem prover too weak. 3088 trivial. 0 not checked. [2023-11-23 22:36:45,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 36 proven. 114 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-23 22:36:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329238407] [2023-11-23 22:36:46,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:36:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272156178] [2023-11-23 22:36:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272156178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:46,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:36:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-23 22:36:46,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544023277] [2023-11-23 22:36:46,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:46,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:36:46,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:36:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:36:46,132 INFO L87 Difference]: Start difference. First operand 983 states and 1594 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-23 22:36:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:36:46,620 INFO L93 Difference]: Finished difference Result 1338 states and 2147 transitions. [2023-11-23 22:36:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:36:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 329 [2023-11-23 22:36:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:36:46,629 INFO L225 Difference]: With dead ends: 1338 [2023-11-23 22:36:46,629 INFO L226 Difference]: Without dead ends: 356 [2023-11-23 22:36:46,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 650 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:36:46,637 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 125 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:36:46,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 426 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:36:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-23 22:36:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2023-11-23 22:36:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 243 states have (on average 1.4156378600823045) internal successors, (344), 243 states have internal predecessors, (344), 102 states have call successors, (102), 6 states have call predecessors, (102), 6 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-23 22:36:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 548 transitions. [2023-11-23 22:36:46,718 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 548 transitions. Word has length 329 [2023-11-23 22:36:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:36:46,723 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 548 transitions. [2023-11-23 22:36:46,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-23 22:36:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 548 transitions. [2023-11-23 22:36:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-23 22:36:46,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:36:46,731 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:46,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:46,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:46,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:36:46,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1347203130, now seen corresponding path program 1 times [2023-11-23 22:36:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:46,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038890609] [2023-11-23 22:36:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:47,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:36:47,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736953402] [2023-11-23 22:36:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:47,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:47,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:47,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:47,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:36:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:47,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:36:47,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2528 proven. 87 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2023-11-23 22:36:47,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 63 proven. 87 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-23 22:36:47,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038890609] [2023-11-23 22:36:47,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:36:47,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736953402] [2023-11-23 22:36:47,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736953402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:47,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:36:47,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-23 22:36:47,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304158067] [2023-11-23 22:36:47,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:47,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:36:47,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:36:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:36:47,964 INFO L87 Difference]: Start difference. First operand 352 states and 548 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2023-11-23 22:36:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:36:48,407 INFO L93 Difference]: Finished difference Result 719 states and 1109 transitions. [2023-11-23 22:36:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:36:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 330 [2023-11-23 22:36:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:36:48,413 INFO L225 Difference]: With dead ends: 719 [2023-11-23 22:36:48,413 INFO L226 Difference]: Without dead ends: 368 [2023-11-23 22:36:48,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 652 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:36:48,417 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 244 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:36:48,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 431 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:36:48,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-23 22:36:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 360. [2023-11-23 22:36:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 249 states have (on average 1.3895582329317269) internal successors, (346), 249 states have internal predecessors, (346), 102 states have call successors, (102), 8 states have call predecessors, (102), 8 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-23 22:36:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 550 transitions. [2023-11-23 22:36:48,489 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 550 transitions. Word has length 330 [2023-11-23 22:36:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:36:48,490 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 550 transitions. [2023-11-23 22:36:48,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2023-11-23 22:36:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 550 transitions. [2023-11-23 22:36:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-23 22:36:48,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:36:48,501 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:48,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:48,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:48,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:36:48,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2134571233, now seen corresponding path program 1 times [2023-11-23 22:36:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684450588] [2023-11-23 22:36:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:48,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:48,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:36:48,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294048567] [2023-11-23 22:36:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:48,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:48,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:48,780 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:48,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:36:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:49,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:36:49,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:36:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2390 proven. 96 refuted. 0 times theorem prover too weak. 2614 trivial. 0 not checked. [2023-11-23 22:36:49,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:36:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 54 proven. 96 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-23 22:36:49,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:36:49,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684450588] [2023-11-23 22:36:49,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:36:49,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294048567] [2023-11-23 22:36:49,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294048567] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:36:49,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:36:49,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-23 22:36:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834576028] [2023-11-23 22:36:49,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:36:49,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:36:49,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:36:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:36:49,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:36:49,911 INFO L87 Difference]: Start difference. First operand 360 states and 550 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-23 22:36:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:36:51,228 INFO L93 Difference]: Finished difference Result 1485 states and 2239 transitions. [2023-11-23 22:36:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 22:36:51,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 331 [2023-11-23 22:36:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:36:51,237 INFO L225 Difference]: With dead ends: 1485 [2023-11-23 22:36:51,237 INFO L226 Difference]: Without dead ends: 1126 [2023-11-23 22:36:51,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 654 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2023-11-23 22:36:51,241 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 755 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:36:51,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 1155 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 22:36:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2023-11-23 22:36:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 733. [2023-11-23 22:36:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 508 states have (on average 1.3661417322834646) internal successors, (694), 508 states have internal predecessors, (694), 204 states have call successors, (204), 20 states have call predecessors, (204), 20 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-23 22:36:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1102 transitions. [2023-11-23 22:36:51,388 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1102 transitions. Word has length 331 [2023-11-23 22:36:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:36:51,389 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1102 transitions. [2023-11-23 22:36:51,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-23 22:36:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1102 transitions. [2023-11-23 22:36:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-23 22:36:51,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:36:51,397 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:36:51,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:36:51,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:51,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:36:51,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:36:51,621 INFO L85 PathProgramCache]: Analyzing trace with hash 280975137, now seen corresponding path program 1 times [2023-11-23 22:36:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:36:51,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808625743] [2023-11-23 22:36:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:51,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:36:51,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:36:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368109717] [2023-11-23 22:36:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:36:51,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:36:51,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:36:51,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:36:51,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d040df-2b33-4a79-863c-0c2acc635597/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:36:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:36:52,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 22:36:52,075 INFO L285 TraceCheckSpWp]: Computing forward predicates...