./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/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_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/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_db211c87-f545-4252-afbf-884df994e701/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 54dd2c42579f0de559de8ea2b74ae8f2f84f80b7530dd7d24e9994fd7ce14291 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:50:21,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:50:21,954 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:50:21,960 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:50:21,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:50:21,987 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:50:21,988 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:50:21,989 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:50:21,989 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:50:21,990 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:50:21,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:50:21,991 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:50:21,992 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:50:21,993 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:50:21,993 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:50:21,994 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:50:21,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:50:21,995 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:50:21,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:50:21,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:50:21,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:50:21,997 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:50:21,998 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:50:21,998 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:50:21,999 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:50:21,999 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:50:22,000 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:50:22,000 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:50:22,001 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:50:22,001 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:50:22,002 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:50:22,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:50:22,002 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:50:22,003 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:50:22,003 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:50:22,004 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:50:22,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:50:22,005 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:50:22,005 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:50:22,005 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:50:22,006 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:50:22,006 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:50:22,007 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_db211c87-f545-4252-afbf-884df994e701/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54dd2c42579f0de559de8ea2b74ae8f2f84f80b7530dd7d24e9994fd7ce14291 [2023-11-26 10:50:22,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:50:22,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:50:22,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:50:22,281 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:50:22,282 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:50:22,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-26 10:50:25,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:50:25,760 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:50:25,762 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-26 10:50:25,778 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/data/0df41c75c/89ea495eae344794bf3c05f880e05301/FLAGff005a842 [2023-11-26 10:50:25,796 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/data/0df41c75c/89ea495eae344794bf3c05f880e05301 [2023-11-26 10:50:25,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:50:25,804 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:50:25,807 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:50:25,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:50:25,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:50:25,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a36b550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25, skipping insertion in model container [2023-11-26 10:50:25,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,886 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:50:26,142 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_db211c87-f545-4252-afbf-884df994e701/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-11-26 10:50:26,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:26,259 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:50:26,323 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_db211c87-f545-4252-afbf-884df994e701/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-11-26 10:50:26,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:26,406 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:50:26,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26 WrapperNode [2023-11-26 10:50:26,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:50:26,408 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:50:26,409 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:50:26,409 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:50:26,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,435 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,509 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 730 [2023-11-26 10:50:26,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:50:26,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:50:26,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:50:26,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:50:26,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,532 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,563 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:50:26,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,590 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,645 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:50:26,646 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:50:26,646 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:50:26,646 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:50:26,647 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (1/1) ... [2023-11-26 10:50:26,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:50:26,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:26,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:50:26,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db211c87-f545-4252-afbf-884df994e701/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:50:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:50:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:50:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:50:26,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:50:26,979 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:50:26,981 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:50:27,667 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:50:27,729 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:50:27,729 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 10:50:27,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:50:27 BoogieIcfgContainer [2023-11-26 10:50:27,730 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:50:27,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:50:27,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:50:27,736 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:50:27,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:50:25" (1/3) ... [2023-11-26 10:50:27,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8f6d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:50:27, skipping insertion in model container [2023-11-26 10:50:27,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:26" (2/3) ... [2023-11-26 10:50:27,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8f6d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:50:27, skipping insertion in model container [2023-11-26 10:50:27,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:50:27" (3/3) ... [2023-11-26 10:50:27,739 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-26 10:50:27,759 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:50:27,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:50:27,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:50:27,821 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;@3a7398c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:50:27,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:50:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 178 states, 176 states have (on average 1.7272727272727273) internal successors, (304), 177 states have internal predecessors, (304), 0 states have call successors, (0), 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 10:50:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-26 10:50:27,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:27,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:27,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:27,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash -303443606, now seen corresponding path program 1 times [2023-11-26 10:50:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536943470] [2023-11-26 10:50:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:28,575 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 10:50:28,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:28,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536943470] [2023-11-26 10:50:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536943470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:28,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:28,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:28,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464060762] [2023-11-26 10:50:28,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:28,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:28,630 INFO L87 Difference]: Start difference. First operand has 178 states, 176 states have (on average 1.7272727272727273) internal successors, (304), 177 states have internal predecessors, (304), 0 states have call successors, (0), 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 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:28,946 INFO L93 Difference]: Finished difference Result 633 states and 1029 transitions. [2023-11-26 10:50:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-26 10:50:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:28,973 INFO L225 Difference]: With dead ends: 633 [2023-11-26 10:50:28,974 INFO L226 Difference]: Without dead ends: 540 [2023-11-26 10:50:28,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:50:28,983 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 1601 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:28,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1601 Valid, 1097 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:50:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-11-26 10:50:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 274. [2023-11-26 10:50:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.5054945054945055) internal successors, (411), 273 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 411 transitions. [2023-11-26 10:50:29,073 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 411 transitions. Word has length 64 [2023-11-26 10:50:29,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:29,074 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 411 transitions. [2023-11-26 10:50:29,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 411 transitions. [2023-11-26 10:50:29,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-26 10:50:29,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:29,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:29,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:50:29,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:29,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1095782796, now seen corresponding path program 1 times [2023-11-26 10:50:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:29,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412027493] [2023-11-26 10:50:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:29,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:29,474 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 10:50:29,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:29,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412027493] [2023-11-26 10:50:29,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412027493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:29,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:29,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:29,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995588787] [2023-11-26 10:50:29,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:29,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:29,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:29,487 INFO L87 Difference]: Start difference. First operand 274 states and 411 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:29,684 INFO L93 Difference]: Finished difference Result 1012 states and 1555 transitions. [2023-11-26 10:50:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:29,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-26 10:50:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:29,690 INFO L225 Difference]: With dead ends: 1012 [2023-11-26 10:50:29,691 INFO L226 Difference]: Without dead ends: 800 [2023-11-26 10:50:29,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:29,698 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 668 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:29,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1020 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:50:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2023-11-26 10:50:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 794. [2023-11-26 10:50:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 1.5258511979823455) internal successors, (1210), 793 states have internal predecessors, (1210), 0 states have call successors, (0), 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 10:50:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1210 transitions. [2023-11-26 10:50:29,768 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1210 transitions. Word has length 65 [2023-11-26 10:50:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:29,768 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1210 transitions. [2023-11-26 10:50:29,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1210 transitions. [2023-11-26 10:50:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-26 10:50:29,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:29,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:29,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:50:29,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:29,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1595686128, now seen corresponding path program 1 times [2023-11-26 10:50:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:29,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99583093] [2023-11-26 10:50:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:29,961 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 10:50:29,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:29,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99583093] [2023-11-26 10:50:29,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99583093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:29,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:29,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468651928] [2023-11-26 10:50:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:29,964 INFO L87 Difference]: Start difference. First operand 794 states and 1210 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:30,255 INFO L93 Difference]: Finished difference Result 2126 states and 3280 transitions. [2023-11-26 10:50:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:30,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-26 10:50:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:30,264 INFO L225 Difference]: With dead ends: 2126 [2023-11-26 10:50:30,265 INFO L226 Difference]: Without dead ends: 1382 [2023-11-26 10:50:30,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:30,268 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 998 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:30,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 242 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:50:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2023-11-26 10:50:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1380. [2023-11-26 10:50:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 1.5337200870195795) internal successors, (2115), 1379 states have internal predecessors, (2115), 0 states have call successors, (0), 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 10:50:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2115 transitions. [2023-11-26 10:50:30,311 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2115 transitions. Word has length 66 [2023-11-26 10:50:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:30,312 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2115 transitions. [2023-11-26 10:50:30,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2115 transitions. [2023-11-26 10:50:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-26 10:50:30,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:30,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:30,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:50:30,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:30,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1582885390, now seen corresponding path program 1 times [2023-11-26 10:50:30,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:30,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026784461] [2023-11-26 10:50:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:30,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:30,439 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 10:50:30,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026784461] [2023-11-26 10:50:30,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026784461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:30,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:30,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303736711] [2023-11-26 10:50:30,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:30,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:30,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:30,443 INFO L87 Difference]: Start difference. First operand 1380 states and 2115 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:30,695 INFO L93 Difference]: Finished difference Result 3712 states and 5741 transitions. [2023-11-26 10:50:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:30,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-26 10:50:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:30,721 INFO L225 Difference]: With dead ends: 3712 [2023-11-26 10:50:30,721 INFO L226 Difference]: Without dead ends: 2432 [2023-11-26 10:50:30,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:30,734 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 924 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:30,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 248 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:50:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2023-11-26 10:50:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2430. [2023-11-26 10:50:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2429 states have (on average 1.53684643886373) internal successors, (3733), 2429 states have internal predecessors, (3733), 0 states have call successors, (0), 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 10:50:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 3733 transitions. [2023-11-26 10:50:30,811 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 3733 transitions. Word has length 66 [2023-11-26 10:50:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:30,811 INFO L495 AbstractCegarLoop]: Abstraction has 2430 states and 3733 transitions. [2023-11-26 10:50:30,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 3733 transitions. [2023-11-26 10:50:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-26 10:50:30,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:30,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:30,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:50:30,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:30,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:30,816 INFO L85 PathProgramCache]: Analyzing trace with hash 441008545, now seen corresponding path program 1 times [2023-11-26 10:50:30,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:30,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005339080] [2023-11-26 10:50:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:30,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:30,983 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 10:50:30,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:30,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005339080] [2023-11-26 10:50:30,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005339080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:30,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:30,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:30,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646616202] [2023-11-26 10:50:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:30,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:30,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:30,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:30,986 INFO L87 Difference]: Start difference. First operand 2430 states and 3733 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:31,259 INFO L93 Difference]: Finished difference Result 6933 states and 10704 transitions. [2023-11-26 10:50:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-26 10:50:31,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:31,286 INFO L225 Difference]: With dead ends: 6933 [2023-11-26 10:50:31,286 INFO L226 Difference]: Without dead ends: 4576 [2023-11-26 10:50:31,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:31,290 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 950 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:31,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 246 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:50:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4576 states. [2023-11-26 10:50:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4576 to 4574. [2023-11-26 10:50:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 1.5344412858080034) internal successors, (7017), 4573 states have internal predecessors, (7017), 0 states have call successors, (0), 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 10:50:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 7017 transitions. [2023-11-26 10:50:31,427 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 7017 transitions. Word has length 66 [2023-11-26 10:50:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:31,428 INFO L495 AbstractCegarLoop]: Abstraction has 4574 states and 7017 transitions. [2023-11-26 10:50:31,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:31,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 7017 transitions. [2023-11-26 10:50:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-26 10:50:31,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:31,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:31,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:50:31,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:31,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1544480193, now seen corresponding path program 1 times [2023-11-26 10:50:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:31,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355596175] [2023-11-26 10:50:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:31,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:31,590 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 10:50:31,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:31,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355596175] [2023-11-26 10:50:31,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355596175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:31,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:31,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:31,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17347506] [2023-11-26 10:50:31,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:31,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:31,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:31,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:31,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:31,594 INFO L87 Difference]: Start difference. First operand 4574 states and 7017 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:31,910 INFO L93 Difference]: Finished difference Result 13472 states and 20724 transitions. [2023-11-26 10:50:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-26 10:50:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:31,960 INFO L225 Difference]: With dead ends: 13472 [2023-11-26 10:50:31,963 INFO L226 Difference]: Without dead ends: 8932 [2023-11-26 10:50:31,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:31,971 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1010 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:31,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 240 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:50:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8932 states. [2023-11-26 10:50:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8932 to 8930. [2023-11-26 10:50:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8930 states, 8929 states have (on average 1.5264867286370254) internal successors, (13630), 8929 states have internal predecessors, (13630), 0 states have call successors, (0), 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 10:50:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8930 states to 8930 states and 13630 transitions. [2023-11-26 10:50:32,199 INFO L78 Accepts]: Start accepts. Automaton has 8930 states and 13630 transitions. Word has length 66 [2023-11-26 10:50:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:32,204 INFO L495 AbstractCegarLoop]: Abstraction has 8930 states and 13630 transitions. [2023-11-26 10:50:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8930 states and 13630 transitions. [2023-11-26 10:50:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-26 10:50:32,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:32,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:32,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:50:32,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:32,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1843096928, now seen corresponding path program 1 times [2023-11-26 10:50:32,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:32,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97727049] [2023-11-26 10:50:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:32,507 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 10:50:32,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:32,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97727049] [2023-11-26 10:50:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97727049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:32,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:50:32,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31099589] [2023-11-26 10:50:32,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:32,511 INFO L87 Difference]: Start difference. First operand 8930 states and 13630 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:32,655 INFO L93 Difference]: Finished difference Result 17508 states and 26655 transitions. [2023-11-26 10:50:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-26 10:50:32,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:32,738 INFO L225 Difference]: With dead ends: 17508 [2023-11-26 10:50:32,738 INFO L226 Difference]: Without dead ends: 17506 [2023-11-26 10:50:32,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:32,745 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 244 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:32,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 978 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2023-11-26 10:50:33,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 9186. [2023-11-26 10:50:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9186 states, 9185 states have (on average 1.5118127381600435) internal successors, (13886), 9185 states have internal predecessors, (13886), 0 states have call successors, (0), 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 10:50:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9186 states to 9186 states and 13886 transitions. [2023-11-26 10:50:33,106 INFO L78 Accepts]: Start accepts. Automaton has 9186 states and 13886 transitions. Word has length 67 [2023-11-26 10:50:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:33,106 INFO L495 AbstractCegarLoop]: Abstraction has 9186 states and 13886 transitions. [2023-11-26 10:50:33,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 9186 states and 13886 transitions. [2023-11-26 10:50:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-26 10:50:33,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:33,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:33,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:50:33,111 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:33,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1022976121, now seen corresponding path program 1 times [2023-11-26 10:50:33,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:33,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198437480] [2023-11-26 10:50:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:33,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:33,295 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 10:50:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:33,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198437480] [2023-11-26 10:50:33,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198437480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:33,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:33,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:33,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587151842] [2023-11-26 10:50:33,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:33,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:33,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:33,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:33,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:33,298 INFO L87 Difference]: Start difference. First operand 9186 states and 13886 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 10:50:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:33,397 INFO L93 Difference]: Finished difference Result 25030 states and 37772 transitions. [2023-11-26 10:50:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-26 10:50:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:33,433 INFO L225 Difference]: With dead ends: 25030 [2023-11-26 10:50:33,434 INFO L226 Difference]: Without dead ends: 16452 [2023-11-26 10:50:33,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 10:50:33,449 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 201 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:33,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 608 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16452 states. [2023-11-26 10:50:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16452 to 16450. [2023-11-26 10:50:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16450 states, 16449 states have (on average 1.497112286461183) internal successors, (24626), 16449 states have internal predecessors, (24626), 0 states have call successors, (0), 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 10:50:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16450 states to 16450 states and 24626 transitions. [2023-11-26 10:50:33,829 INFO L78 Accepts]: Start accepts. Automaton has 16450 states and 24626 transitions. Word has length 68 [2023-11-26 10:50:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:33,829 INFO L495 AbstractCegarLoop]: Abstraction has 16450 states and 24626 transitions. [2023-11-26 10:50:33,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 10:50:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 16450 states and 24626 transitions. [2023-11-26 10:50:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 10:50:33,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:33,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:33,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:50:33,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:33,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash 727982169, now seen corresponding path program 1 times [2023-11-26 10:50:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130154679] [2023-11-26 10:50:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:33,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:33,897 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 10:50:33,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:33,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130154679] [2023-11-26 10:50:33,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130154679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:33,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:33,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:33,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067518452] [2023-11-26 10:50:33,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:33,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:33,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:33,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:33,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:33,900 INFO L87 Difference]: Start difference. First operand 16450 states and 24626 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:34,105 INFO L93 Difference]: Finished difference Result 29077 states and 43494 transitions. [2023-11-26 10:50:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:34,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-26 10:50:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:34,148 INFO L225 Difference]: With dead ends: 29077 [2023-11-26 10:50:34,148 INFO L226 Difference]: Without dead ends: 20047 [2023-11-26 10:50:34,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:34,164 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 155 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:34,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 465 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:34,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20047 states. [2023-11-26 10:50:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20047 to 19822. [2023-11-26 10:50:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19822 states, 19821 states have (on average 1.4736390696735786) internal successors, (29209), 19821 states have internal predecessors, (29209), 0 states have call successors, (0), 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 10:50:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19822 states to 19822 states and 29209 transitions. [2023-11-26 10:50:34,722 INFO L78 Accepts]: Start accepts. Automaton has 19822 states and 29209 transitions. Word has length 69 [2023-11-26 10:50:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:34,723 INFO L495 AbstractCegarLoop]: Abstraction has 19822 states and 29209 transitions. [2023-11-26 10:50:34,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 19822 states and 29209 transitions. [2023-11-26 10:50:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 10:50:34,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:34,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:34,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:50:34,728 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:34,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1778498824, now seen corresponding path program 1 times [2023-11-26 10:50:34,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:34,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683025620] [2023-11-26 10:50:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:34,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:34,815 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 10:50:34,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:34,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683025620] [2023-11-26 10:50:34,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683025620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:34,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:34,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:34,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310847277] [2023-11-26 10:50:34,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:34,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:34,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:34,819 INFO L87 Difference]: Start difference. First operand 19822 states and 29209 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:34,952 INFO L93 Difference]: Finished difference Result 26900 states and 39488 transitions. [2023-11-26 10:50:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:34,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-26 10:50:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:35,001 INFO L225 Difference]: With dead ends: 26900 [2023-11-26 10:50:35,001 INFO L226 Difference]: Without dead ends: 20311 [2023-11-26 10:50:35,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:35,014 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 143 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:35,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 463 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20311 states. [2023-11-26 10:50:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20311 to 18377. [2023-11-26 10:50:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18377 states, 18376 states have (on average 1.4465063125816282) internal successors, (26581), 18376 states have internal predecessors, (26581), 0 states have call successors, (0), 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 10:50:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18377 states to 18377 states and 26581 transitions. [2023-11-26 10:50:35,475 INFO L78 Accepts]: Start accepts. Automaton has 18377 states and 26581 transitions. Word has length 69 [2023-11-26 10:50:35,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:35,475 INFO L495 AbstractCegarLoop]: Abstraction has 18377 states and 26581 transitions. [2023-11-26 10:50:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 18377 states and 26581 transitions. [2023-11-26 10:50:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 10:50:35,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:35,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:35,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:50:35,481 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:35,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:35,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1077276120, now seen corresponding path program 1 times [2023-11-26 10:50:35,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:35,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885308573] [2023-11-26 10:50:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:35,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:35,741 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 10:50:35,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:35,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885308573] [2023-11-26 10:50:35,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885308573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:35,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:35,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:35,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745480455] [2023-11-26 10:50:35,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:35,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:35,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:35,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:35,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:35,748 INFO L87 Difference]: Start difference. First operand 18377 states and 26581 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:35,970 INFO L93 Difference]: Finished difference Result 36535 states and 53220 transitions. [2023-11-26 10:50:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-26 10:50:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:36,042 INFO L225 Difference]: With dead ends: 36535 [2023-11-26 10:50:36,042 INFO L226 Difference]: Without dead ends: 29181 [2023-11-26 10:50:36,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:50:36,057 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1114 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:36,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 1332 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:50:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29181 states. [2023-11-26 10:50:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29181 to 24795. [2023-11-26 10:50:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24795 states, 24794 states have (on average 1.4470033072517545) internal successors, (35877), 24794 states have internal predecessors, (35877), 0 states have call successors, (0), 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 10:50:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24795 states to 24795 states and 35877 transitions. [2023-11-26 10:50:36,671 INFO L78 Accepts]: Start accepts. Automaton has 24795 states and 35877 transitions. Word has length 69 [2023-11-26 10:50:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:36,671 INFO L495 AbstractCegarLoop]: Abstraction has 24795 states and 35877 transitions. [2023-11-26 10:50:36,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 24795 states and 35877 transitions. [2023-11-26 10:50:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 10:50:36,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:36,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:36,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:50:36,677 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:36,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:36,678 INFO L85 PathProgramCache]: Analyzing trace with hash -736167559, now seen corresponding path program 1 times [2023-11-26 10:50:36,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:36,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981899337] [2023-11-26 10:50:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:36,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:36,750 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 10:50:36,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:36,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981899337] [2023-11-26 10:50:36,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981899337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:36,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:36,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302149138] [2023-11-26 10:50:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:36,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:36,753 INFO L87 Difference]: Start difference. First operand 24795 states and 35877 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:37,159 INFO L93 Difference]: Finished difference Result 64326 states and 93099 transitions. [2023-11-26 10:50:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-26 10:50:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:37,253 INFO L225 Difference]: With dead ends: 64326 [2023-11-26 10:50:37,253 INFO L226 Difference]: Without dead ends: 42804 [2023-11-26 10:50:37,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:37,276 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 173 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:37,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 463 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42804 states. [2023-11-26 10:50:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42804 to 42712. [2023-11-26 10:50:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42712 states, 42711 states have (on average 1.433588536910866) internal successors, (61230), 42711 states have internal predecessors, (61230), 0 states have call successors, (0), 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 10:50:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42712 states to 42712 states and 61230 transitions. [2023-11-26 10:50:38,125 INFO L78 Accepts]: Start accepts. Automaton has 42712 states and 61230 transitions. Word has length 69 [2023-11-26 10:50:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:38,125 INFO L495 AbstractCegarLoop]: Abstraction has 42712 states and 61230 transitions. [2023-11-26 10:50:38,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 42712 states and 61230 transitions. [2023-11-26 10:50:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 10:50:38,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:38,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:38,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:50:38,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:38,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:38,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1508312264, now seen corresponding path program 1 times [2023-11-26 10:50:38,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:38,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922814834] [2023-11-26 10:50:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:38,473 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 10:50:38,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:38,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922814834] [2023-11-26 10:50:38,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922814834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:38,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:38,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:38,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797496926] [2023-11-26 10:50:38,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:38,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:38,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:38,476 INFO L87 Difference]: Start difference. First operand 42712 states and 61230 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:38,772 INFO L93 Difference]: Finished difference Result 60346 states and 86847 transitions. [2023-11-26 10:50:38,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:38,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-26 10:50:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:38,859 INFO L225 Difference]: With dead ends: 60346 [2023-11-26 10:50:38,859 INFO L226 Difference]: Without dead ends: 57374 [2023-11-26 10:50:38,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:50:38,878 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1119 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:38,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 1192 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:50:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57374 states. [2023-11-26 10:50:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57374 to 45652. [2023-11-26 10:50:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45652 states, 45651 states have (on average 1.4336159120282141) internal successors, (65446), 45651 states have internal predecessors, (65446), 0 states have call successors, (0), 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 10:50:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45652 states to 45652 states and 65446 transitions. [2023-11-26 10:50:39,977 INFO L78 Accepts]: Start accepts. Automaton has 45652 states and 65446 transitions. Word has length 69 [2023-11-26 10:50:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:39,978 INFO L495 AbstractCegarLoop]: Abstraction has 45652 states and 65446 transitions. [2023-11-26 10:50:39,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 45652 states and 65446 transitions. [2023-11-26 10:50:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 10:50:39,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:39,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:50:39,986 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:39,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash -567435143, now seen corresponding path program 1 times [2023-11-26 10:50:39,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:39,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508279569] [2023-11-26 10:50:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:40,152 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 10:50:40,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508279569] [2023-11-26 10:50:40,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508279569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:40,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:40,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:40,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714032027] [2023-11-26 10:50:40,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:40,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:40,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:40,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:40,155 INFO L87 Difference]: Start difference. First operand 45652 states and 65446 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:40,532 INFO L93 Difference]: Finished difference Result 66852 states and 96245 transitions. [2023-11-26 10:50:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-26 10:50:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:40,638 INFO L225 Difference]: With dead ends: 66852 [2023-11-26 10:50:40,638 INFO L226 Difference]: Without dead ends: 60240 [2023-11-26 10:50:40,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:50:40,661 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 1028 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:40,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 1371 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:50:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60240 states. [2023-11-26 10:50:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60240 to 52218. [2023-11-26 10:50:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52218 states, 52217 states have (on average 1.433632724974625) internal successors, (74860), 52217 states have internal predecessors, (74860), 0 states have call successors, (0), 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 10:50:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52218 states to 52218 states and 74860 transitions. [2023-11-26 10:50:41,754 INFO L78 Accepts]: Start accepts. Automaton has 52218 states and 74860 transitions. Word has length 69 [2023-11-26 10:50:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:41,754 INFO L495 AbstractCegarLoop]: Abstraction has 52218 states and 74860 transitions. [2023-11-26 10:50:41,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 52218 states and 74860 transitions. [2023-11-26 10:50:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 10:50:41,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:41,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:41,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:50:41,761 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:41,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1772958041, now seen corresponding path program 1 times [2023-11-26 10:50:41,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:41,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278726060] [2023-11-26 10:50:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:41,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:42,300 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 10:50:42,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278726060] [2023-11-26 10:50:42,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278726060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:42,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:42,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:42,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687782147] [2023-11-26 10:50:42,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:42,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:42,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:42,303 INFO L87 Difference]: Start difference. First operand 52218 states and 74860 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:42,636 INFO L93 Difference]: Finished difference Result 82000 states and 118199 transitions. [2023-11-26 10:50:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:42,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-26 10:50:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:42,732 INFO L225 Difference]: With dead ends: 82000 [2023-11-26 10:50:42,732 INFO L226 Difference]: Without dead ends: 70430 [2023-11-26 10:50:42,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:50:42,756 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1120 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:42,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 1322 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:50:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70430 states. [2023-11-26 10:50:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70430 to 61048. [2023-11-26 10:50:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61048 states, 61047 states have (on average 1.4345012858944748) internal successors, (87572), 61047 states have internal predecessors, (87572), 0 states have call successors, (0), 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 10:50:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61048 states to 61048 states and 87572 transitions. [2023-11-26 10:50:43,754 INFO L78 Accepts]: Start accepts. Automaton has 61048 states and 87572 transitions. Word has length 69 [2023-11-26 10:50:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:43,754 INFO L495 AbstractCegarLoop]: Abstraction has 61048 states and 87572 transitions. [2023-11-26 10:50:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 61048 states and 87572 transitions. [2023-11-26 10:50:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-26 10:50:43,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:43,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:43,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:50:43,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:43,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:43,763 INFO L85 PathProgramCache]: Analyzing trace with hash -390496674, now seen corresponding path program 1 times [2023-11-26 10:50:43,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:43,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265664932] [2023-11-26 10:50:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:43,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:44,115 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 10:50:44,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:44,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265664932] [2023-11-26 10:50:44,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265664932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:44,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:44,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:44,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498296925] [2023-11-26 10:50:44,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:44,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:44,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:44,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:44,120 INFO L87 Difference]: Start difference. First operand 61048 states and 87572 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:44,607 INFO L93 Difference]: Finished difference Result 125553 states and 179234 transitions. [2023-11-26 10:50:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-11-26 10:50:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:44,726 INFO L225 Difference]: With dead ends: 125553 [2023-11-26 10:50:44,727 INFO L226 Difference]: Without dead ends: 68316 [2023-11-26 10:50:44,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:44,770 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 159 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:44,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 563 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68316 states. [2023-11-26 10:50:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68316 to 62535. [2023-11-26 10:50:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62535 states, 62534 states have (on average 1.3985991620558416) internal successors, (87460), 62534 states have internal predecessors, (87460), 0 states have call successors, (0), 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 10:50:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62535 states to 62535 states and 87460 transitions. [2023-11-26 10:50:45,985 INFO L78 Accepts]: Start accepts. Automaton has 62535 states and 87460 transitions. Word has length 72 [2023-11-26 10:50:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:45,985 INFO L495 AbstractCegarLoop]: Abstraction has 62535 states and 87460 transitions. [2023-11-26 10:50:45,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 62535 states and 87460 transitions. [2023-11-26 10:50:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-26 10:50:45,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:45,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:45,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:50:45,996 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:45,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:45,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1903153330, now seen corresponding path program 1 times [2023-11-26 10:50:45,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:45,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842964117] [2023-11-26 10:50:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:45,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:46,140 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 10:50:46,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:46,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842964117] [2023-11-26 10:50:46,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842964117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:46,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:46,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:46,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145293389] [2023-11-26 10:50:46,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:46,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:50:46,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:46,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:50:46,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:46,143 INFO L87 Difference]: Start difference. First operand 62535 states and 87460 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 10:50:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:48,325 INFO L93 Difference]: Finished difference Result 349463 states and 486285 transitions. [2023-11-26 10:50:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:50:48,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-11-26 10:50:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:48,788 INFO L225 Difference]: With dead ends: 349463 [2023-11-26 10:50:48,788 INFO L226 Difference]: Without dead ends: 326648 [2023-11-26 10:50:48,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:50:48,843 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 3531 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3531 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:48,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3531 Valid, 469 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:50:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326648 states. [2023-11-26 10:50:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326648 to 62651. [2023-11-26 10:50:51,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62651 states, 62650 states have (on average 1.39829209896249) internal successors, (87603), 62650 states have internal predecessors, (87603), 0 states have call successors, (0), 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 10:50:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62651 states to 62651 states and 87603 transitions. [2023-11-26 10:50:52,113 INFO L78 Accepts]: Start accepts. Automaton has 62651 states and 87603 transitions. Word has length 74 [2023-11-26 10:50:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:52,113 INFO L495 AbstractCegarLoop]: Abstraction has 62651 states and 87603 transitions. [2023-11-26 10:50:52,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 10:50:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 62651 states and 87603 transitions. [2023-11-26 10:50:52,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-26 10:50:52,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:52,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:52,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:50:52,127 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:52,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash -331835791, now seen corresponding path program 1 times [2023-11-26 10:50:52,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:52,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339996035] [2023-11-26 10:50:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:52,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:52,341 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 10:50:52,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:52,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339996035] [2023-11-26 10:50:52,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339996035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:52,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:52,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152165225] [2023-11-26 10:50:52,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:52,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:50:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:50:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:52,344 INFO L87 Difference]: Start difference. First operand 62651 states and 87603 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 10:50:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:54,191 INFO L93 Difference]: Finished difference Result 347616 states and 481034 transitions. [2023-11-26 10:50:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:50:54,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-11-26 10:50:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:54,613 INFO L225 Difference]: With dead ends: 347616 [2023-11-26 10:50:54,613 INFO L226 Difference]: Without dead ends: 324858 [2023-11-26 10:50:54,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:50:54,679 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 3042 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3042 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:54,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3042 Valid, 474 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:50:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324858 states. [2023-11-26 10:50:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324858 to 62879. [2023-11-26 10:50:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62879 states, 62878 states have (on average 1.3978975158242946) internal successors, (87897), 62878 states have internal predecessors, (87897), 0 states have call successors, (0), 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 10:50:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62879 states to 62879 states and 87897 transitions. [2023-11-26 10:50:57,720 INFO L78 Accepts]: Start accepts. Automaton has 62879 states and 87897 transitions. Word has length 74 [2023-11-26 10:50:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:57,721 INFO L495 AbstractCegarLoop]: Abstraction has 62879 states and 87897 transitions. [2023-11-26 10:50:57,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 10:50:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 62879 states and 87897 transitions. [2023-11-26 10:50:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-26 10:50:57,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:57,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:57,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 10:50:57,735 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:57,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1896213327, now seen corresponding path program 1 times [2023-11-26 10:50:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:57,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045328776] [2023-11-26 10:50:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:58,178 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 10:50:58,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045328776] [2023-11-26 10:50:58,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045328776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:58,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:58,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33021464] [2023-11-26 10:50:58,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:58,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:50:58,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:50:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:58,183 INFO L87 Difference]: Start difference. First operand 62879 states and 87897 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 10:50:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:59,491 INFO L93 Difference]: Finished difference Result 255817 states and 353436 transitions. [2023-11-26 10:50:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:50:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-11-26 10:50:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:59,816 INFO L225 Difference]: With dead ends: 255817 [2023-11-26 10:50:59,817 INFO L226 Difference]: Without dead ends: 221780 [2023-11-26 10:50:59,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:50:59,875 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 2501 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2501 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:59,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2501 Valid, 397 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:51:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221780 states. [2023-11-26 10:51:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221780 to 62929. [2023-11-26 10:51:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62929 states, 62928 states have (on average 1.3977402745995424) internal successors, (87957), 62928 states have internal predecessors, (87957), 0 states have call successors, (0), 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 10:51:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62929 states to 62929 states and 87957 transitions. [2023-11-26 10:51:02,433 INFO L78 Accepts]: Start accepts. Automaton has 62929 states and 87957 transitions. Word has length 74 [2023-11-26 10:51:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:51:02,434 INFO L495 AbstractCegarLoop]: Abstraction has 62929 states and 87957 transitions. [2023-11-26 10:51:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 10:51:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 62929 states and 87957 transitions. [2023-11-26 10:51:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-26 10:51:02,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:51:02,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:51:02,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 10:51:02,443 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:51:02,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:51:02,443 INFO L85 PathProgramCache]: Analyzing trace with hash -97924719, now seen corresponding path program 1 times [2023-11-26 10:51:02,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:51:02,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713628102] [2023-11-26 10:51:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:51:02,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:51:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:51:02,598 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 10:51:02,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:51:02,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713628102] [2023-11-26 10:51:02,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713628102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:51:02,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:51:02,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:51:02,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142093966] [2023-11-26 10:51:02,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:51:02,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:51:02,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:51:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:51:02,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:51:02,601 INFO L87 Difference]: Start difference. First operand 62929 states and 87957 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 10:51:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:51:03,824 INFO L93 Difference]: Finished difference Result 283356 states and 390738 transitions. [2023-11-26 10:51:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:51:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-11-26 10:51:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:51:04,197 INFO L225 Difference]: With dead ends: 283356 [2023-11-26 10:51:04,197 INFO L226 Difference]: Without dead ends: 271450 [2023-11-26 10:51:04,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:51:04,253 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 2714 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2714 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:51:04,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2714 Valid, 443 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:51:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271450 states. [2023-11-26 10:51:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271450 to 63385. [2023-11-26 10:51:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63385 states, 63384 states have (on average 1.3965196264041397) internal successors, (88517), 63384 states have internal predecessors, (88517), 0 states have call successors, (0), 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 10:51:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63385 states to 63385 states and 88517 transitions. [2023-11-26 10:51:07,386 INFO L78 Accepts]: Start accepts. Automaton has 63385 states and 88517 transitions. Word has length 74 [2023-11-26 10:51:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:51:07,389 INFO L495 AbstractCegarLoop]: Abstraction has 63385 states and 88517 transitions. [2023-11-26 10:51:07,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 10:51:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 63385 states and 88517 transitions. [2023-11-26 10:51:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-26 10:51:07,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:51:07,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:51:07,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 10:51:07,405 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:51:07,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:51:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash 547595205, now seen corresponding path program 1 times [2023-11-26 10:51:07,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:51:07,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557698932] [2023-11-26 10:51:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:51:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:51:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:51:07,780 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 10:51:07,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:51:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557698932] [2023-11-26 10:51:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557698932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:51:07,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:51:07,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:51:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550959516] [2023-11-26 10:51:07,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:51:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:51:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:51:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:51:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:51:07,783 INFO L87 Difference]: Start difference. First operand 63385 states and 88517 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:51:09,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:51:09,998 INFO L93 Difference]: Finished difference Result 146474 states and 203618 transitions. [2023-11-26 10:51:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 10:51:09,998 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-26 10:51:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:51:10,180 INFO L225 Difference]: With dead ends: 146474 [2023-11-26 10:51:10,181 INFO L226 Difference]: Without dead ends: 130887 [2023-11-26 10:51:10,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:51:10,210 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1540 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:51:10,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1540 Valid, 1429 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 10:51:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130887 states.