./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.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_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/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_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/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_291cd621-069f-4455-ac5c-c23f8c9862b0/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 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:48:36,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:48:36,589 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:48:36,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:48:36,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:48:36,636 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:48:36,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:48:36,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:48:36,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:48:36,640 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:48:36,640 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:48:36,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:48:36,642 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:48:36,643 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:48:36,643 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:48:36,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:48:36,645 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:48:36,645 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:48:36,646 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:48:36,647 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:48:36,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:48:36,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:48:36,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:48:36,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:48:36,653 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:48:36,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:48:36,654 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:48:36,655 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:48:36,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:48:36,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:48:36,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:48:36,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:36,659 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:48:36,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:48:36,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:48:36,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:48:36,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:48:36,661 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:48:36,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:48:36,662 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:48:36,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:48:36,663 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:48:36,663 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_291cd621-069f-4455-ac5c-c23f8c9862b0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 [2023-11-26 10:48:37,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:48:37,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:48:37,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:48:37,051 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:48:37,052 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:48:37,053 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2023-11-26 10:48:40,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:48:40,787 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:48:40,787 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2023-11-26 10:48:40,797 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/data/1c76cf72a/3ed100b8ff304ccea69d031702aa4453/FLAG56d497907 [2023-11-26 10:48:40,814 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/data/1c76cf72a/3ed100b8ff304ccea69d031702aa4453 [2023-11-26 10:48:40,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:48:40,819 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:48:40,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:40,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:48:40,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:48:40,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:40" (1/1) ... [2023-11-26 10:48:40,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f465266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:40, skipping insertion in model container [2023-11-26 10:48:40,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:40" (1/1) ... [2023-11-26 10:48:40,858 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:48:41,092 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_291cd621-069f-4455-ac5c-c23f8c9862b0/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2023-11-26 10:48:41,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:41,127 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:48:41,142 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_291cd621-069f-4455-ac5c-c23f8c9862b0/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2023-11-26 10:48:41,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:41,168 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:48:41,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41 WrapperNode [2023-11-26 10:48:41,169 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:41,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:41,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:48:41,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:48:41,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,189 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,213 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-11-26 10:48:41,213 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:41,214 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:48:41,214 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:48:41,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:48:41,226 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,228 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,243 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 10:48:41,243 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,243 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,247 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,252 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:48:41,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:48:41,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:48:41,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:48:41,259 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (1/1) ... [2023-11-26 10:48:41,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:41,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:41,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:48:41,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:48:41,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:48:41,342 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:48:41,342 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:48:41,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:48:41,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:48:41,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:48:41,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:48:41,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:48:41,423 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:48:41,426 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:48:41,630 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:48:41,668 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:48:41,668 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:48:41,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:41 BoogieIcfgContainer [2023-11-26 10:48:41,669 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:48:41,673 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:48:41,673 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:48:41,678 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:48:41,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:48:40" (1/3) ... [2023-11-26 10:48:41,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498e6f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:41, skipping insertion in model container [2023-11-26 10:48:41,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:41" (2/3) ... [2023-11-26 10:48:41,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498e6f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:41, skipping insertion in model container [2023-11-26 10:48:41,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:41" (3/3) ... [2023-11-26 10:48:41,682 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2023-11-26 10:48:41,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:48:41,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:48:41,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:48:41,811 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;@3a69b762, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:48:41,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:48:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 10:48:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:48:41,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:41,833 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:41,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:41,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash 760957734, now seen corresponding path program 1 times [2023-11-26 10:48:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:41,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763562101] [2023-11-26 10:48:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:42,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:48:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:42,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:48:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:42,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-26 10:48:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:48:42,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763562101] [2023-11-26 10:48:42,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763562101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:42,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:42,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:48:42,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845022441] [2023-11-26 10:48:42,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:42,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:48:42,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:42,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:48:42,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:42,265 INFO L87 Difference]: Start difference. First operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:48:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:42,318 INFO L93 Difference]: Finished difference Result 58 states and 99 transitions. [2023-11-26 10:48:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:48:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-11-26 10:48:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:42,332 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:48:42,332 INFO L226 Difference]: Without dead ends: 28 [2023-11-26 10:48:42,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:42,340 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:42,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-26 10:48:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-26 10:48:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-26 10:48:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-11-26 10:48:42,390 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 23 [2023-11-26 10:48:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:42,391 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-11-26 10:48:42,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:48:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-11-26 10:48:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:48:42,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:42,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:42,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:48:42,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:42,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:42,396 INFO L85 PathProgramCache]: Analyzing trace with hash -387749596, now seen corresponding path program 1 times [2023-11-26 10:48:42,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:42,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519839159] [2023-11-26 10:48:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:42,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:42,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:48:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:42,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:48:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:42,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-26 10:48:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:48:42,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:42,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519839159] [2023-11-26 10:48:42,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519839159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:42,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:42,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:42,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978714157] [2023-11-26 10:48:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:42,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:42,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:42,726 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:48:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:42,818 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-11-26 10:48:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-11-26 10:48:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:42,822 INFO L225 Difference]: With dead ends: 41 [2023-11-26 10:48:42,822 INFO L226 Difference]: Without dead ends: 39 [2023-11-26 10:48:42,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 10:48:42,825 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:42,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-26 10:48:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-11-26 10:48:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-26 10:48:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-11-26 10:48:42,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2023-11-26 10:48:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:42,846 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-11-26 10:48:42,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:48:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-11-26 10:48:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 10:48:42,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:42,848 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:42,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:48:42,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:42,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:42,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1391236353, now seen corresponding path program 1 times [2023-11-26 10:48:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:42,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214245731] [2023-11-26 10:48:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:42,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:43,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:48:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:43,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:48:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:43,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-26 10:48:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:43,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 10:48:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:48:43,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:43,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214245731] [2023-11-26 10:48:43,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214245731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:43,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:43,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:43,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105210578] [2023-11-26 10:48:43,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:43,481 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:48:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:43,626 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-11-26 10:48:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:43,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-26 10:48:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:43,630 INFO L225 Difference]: With dead ends: 45 [2023-11-26 10:48:43,630 INFO L226 Difference]: Without dead ends: 43 [2023-11-26 10:48:43,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 10:48:43,633 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:43,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-26 10:48:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2023-11-26 10:48:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-26 10:48:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-11-26 10:48:43,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 28 [2023-11-26 10:48:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:43,666 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-11-26 10:48:43,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:48:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-11-26 10:48:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 10:48:43,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:43,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:43,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:48:43,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:43,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 831418820, now seen corresponding path program 1 times [2023-11-26 10:48:43,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:43,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352866600] [2023-11-26 10:48:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:43,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:43,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593930227] [2023-11-26 10:48:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:43,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:43,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:43,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:48:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:43,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 10:48:43,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:48:44,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:48:44,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:44,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352866600] [2023-11-26 10:48:44,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:44,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593930227] [2023-11-26 10:48:44,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593930227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:44,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:44,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-11-26 10:48:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089030119] [2023-11-26 10:48:44,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:44,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:48:44,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:48:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:48:44,403 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-26 10:48:49,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:48:53,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:48:57,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:01,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:05,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:06,488 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2023-11-26 10:49:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:49:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 33 [2023-11-26 10:49:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:06,493 INFO L225 Difference]: With dead ends: 75 [2023-11-26 10:49:06,493 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 10:49:06,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:49:06,496 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 25 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:06,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 192 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 238 Invalid, 4 Unknown, 0 Unchecked, 21.9s Time] [2023-11-26 10:49:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 10:49:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-26 10:49:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 37 states have internal predecessors, (38), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-26 10:49:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2023-11-26 10:49:06,536 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 33 [2023-11-26 10:49:06,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:06,538 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2023-11-26 10:49:06,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-26 10:49:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2023-11-26 10:49:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:49:06,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:06,544 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:06,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:49:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:06,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:06,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1016562388, now seen corresponding path program 1 times [2023-11-26 10:49:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:06,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055840333] [2023-11-26 10:49:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:06,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:06,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146165317] [2023-11-26 10:49:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:06,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:06,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:06,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:06,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:49:06,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 10:49:07,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:07,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:07,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055840333] [2023-11-26 10:49:07,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:07,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146165317] [2023-11-26 10:49:07,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146165317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:07,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:07,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 10:49:07,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999166882] [2023-11-26 10:49:07,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:07,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:49:07,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:07,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:49:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:49:07,308 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 10:49:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:08,376 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2023-11-26 10:49:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:49:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2023-11-26 10:49:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:08,379 INFO L225 Difference]: With dead ends: 71 [2023-11-26 10:49:08,379 INFO L226 Difference]: Without dead ends: 60 [2023-11-26 10:49:08,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:49:08,381 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:08,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 160 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 10:49:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-26 10:49:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-26 10:49:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:49:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2023-11-26 10:49:08,406 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 40 [2023-11-26 10:49:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:08,407 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2023-11-26 10:49:08,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 10:49:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2023-11-26 10:49:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 10:49:08,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:08,409 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:08,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:08,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:08,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:08,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2057146835, now seen corresponding path program 1 times [2023-11-26 10:49:08,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:08,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561594604] [2023-11-26 10:49:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:08,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:08,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272376847] [2023-11-26 10:49:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:08,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:08,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:08,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:08,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:49:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:08,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 10:49:08,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-26 10:49:09,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 10:49:11,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561594604] [2023-11-26 10:49:11,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272376847] [2023-11-26 10:49:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272376847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:11,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:11,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-11-26 10:49:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974725387] [2023-11-26 10:49:11,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:49:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:49:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:49:11,333 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-26 10:49:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:13,425 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2023-11-26 10:49:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:49:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 57 [2023-11-26 10:49:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:13,428 INFO L225 Difference]: With dead ends: 75 [2023-11-26 10:49:13,428 INFO L226 Difference]: Without dead ends: 73 [2023-11-26 10:49:13,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:49:13,429 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:13,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 138 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-26 10:49:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-26 10:49:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-11-26 10:49:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 41 states have (on average 1.146341463414634) internal successors, (47), 46 states have internal predecessors, (47), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 10:49:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2023-11-26 10:49:13,470 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 57 [2023-11-26 10:49:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:13,471 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2023-11-26 10:49:13,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-26 10:49:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2023-11-26 10:49:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-26 10:49:13,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:13,473 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:13,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:13,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:49:13,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:13,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1279989020, now seen corresponding path program 1 times [2023-11-26 10:49:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:13,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886787369] [2023-11-26 10:49:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:13,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:13,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:13,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967114500] [2023-11-26 10:49:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:13,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:13,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:13,706 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:13,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:49:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 10:49:13,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 10:49:14,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-11-26 10:49:20,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:20,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886787369] [2023-11-26 10:49:20,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:20,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967114500] [2023-11-26 10:49:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967114500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:20,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:20,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2023-11-26 10:49:20,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426650667] [2023-11-26 10:49:20,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:20,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:49:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:49:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:49:20,070 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-26 10:49:21,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:23,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:25,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:31,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:35,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:40,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:41,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:49:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:41,742 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2023-11-26 10:49:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:49:41,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) Word has length 67 [2023-11-26 10:49:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:41,744 INFO L225 Difference]: With dead ends: 110 [2023-11-26 10:49:41,744 INFO L226 Difference]: Without dead ends: 98 [2023-11-26 10:49:41,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:49:41,746 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:41,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 260 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 325 Invalid, 1 Unknown, 0 Unchecked, 21.0s Time] [2023-11-26 10:49:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-26 10:49:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2023-11-26 10:49:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 58 states have internal predecessors, (61), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-26 10:49:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2023-11-26 10:49:41,782 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 67 [2023-11-26 10:49:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:41,783 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2023-11-26 10:49:41,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-26 10:49:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2023-11-26 10:49:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-26 10:49:41,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:41,785 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:41,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:41,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:49:41,991 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:41,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1282123871, now seen corresponding path program 1 times [2023-11-26 10:49:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:41,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285248310] [2023-11-26 10:49:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:41,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:41,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:41,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214832807] [2023-11-26 10:49:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:41,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:42,000 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:42,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_291cd621-069f-4455-ac5c-c23f8c9862b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:49:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:43,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-26 10:49:43,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 10:49:44,343 INFO L327 TraceCheckSpWp]: Computing backward predicates...