./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5208e97c947824349dcc8cb32160d4052cba683a795fae400d45ff0b27a23a25 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:26:38,512 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:26:38,599 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:26:38,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:26:38,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:26:38,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:26:38,641 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:26:38,642 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:26:38,643 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:26:38,644 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:26:38,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:26:38,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:26:38,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:26:38,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:26:38,649 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:26:38,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:26:38,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:26:38,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:26:38,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:26:38,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:26:38,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:26:38,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:26:38,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:26:38,656 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:26:38,656 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:26:38,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:26:38,658 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:26:38,658 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:26:38,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:26:38,659 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:26:38,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:26:38,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:26:38,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:26:38,662 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:26:38,662 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:26:38,663 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:26:38,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:26:38,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:26:38,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:26:38,665 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:26:38,666 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:26:38,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:26:38,667 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_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5208e97c947824349dcc8cb32160d4052cba683a795fae400d45ff0b27a23a25 [2023-11-23 22:26:38,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:26:39,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:26:39,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:26:39,035 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:26:39,036 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:26:39,037 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i [2023-11-23 22:26:42,325 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:26:42,675 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:26:42,676 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i [2023-11-23 22:26:42,702 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/data/248a42c6e/89c6d86fb2c042fb9ab94799e2f040d3/FLAGcce1cc4b0 [2023-11-23 22:26:42,721 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/data/248a42c6e/89c6d86fb2c042fb9ab94799e2f040d3 [2023-11-23 22:26:42,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:26:42,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:26:42,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:26:42,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:26:42,742 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:26:42,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158aac38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:42, skipping insertion in model container [2023-11-23 22:26:42,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:42" (1/1) ... [2023-11-23 22:26:42,846 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:26:43,114 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_c9730606-484e-4816-873d-63fb6b3834d2/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i[916,929] [2023-11-23 22:26:43,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:26:43,317 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:26:43,331 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_c9730606-484e-4816-873d-63fb6b3834d2/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i[916,929] [2023-11-23 22:26:43,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:26:43,483 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:26:43,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43 WrapperNode [2023-11-23 22:26:43,486 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:26:43,487 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:26:43,487 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:26:43,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:26:43,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,524 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,606 INFO L138 Inliner]: procedures = 26, calls = 74, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 484 [2023-11-23 22:26:43,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:26:43,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:26:43,608 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:26:43,608 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:26:43,621 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,631 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,675 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:26:43,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,706 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,712 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,718 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,725 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:26:43,737 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:26:43,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:26:43,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:26:43,738 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (1/1) ... [2023-11-23 22:26:43,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:26:43,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:43,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:26:43,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:26:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:26:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:26:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:26:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:26:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:26:43,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:26:43,980 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:26:43,983 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:26:45,077 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:26:45,144 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:26:45,145 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:26:45,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:45 BoogieIcfgContainer [2023-11-23 22:26:45,145 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:26:45,148 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:26:45,149 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:26:45,153 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:26:45,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:26:42" (1/3) ... [2023-11-23 22:26:45,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3534a56f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:45, skipping insertion in model container [2023-11-23 22:26:45,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:43" (2/3) ... [2023-11-23 22:26:45,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3534a56f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:45, skipping insertion in model container [2023-11-23 22:26:45,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:45" (3/3) ... [2023-11-23 22:26:45,157 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-55.i [2023-11-23 22:26:45,180 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:26:45,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:26:45,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:26:45,272 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;@5c37ca7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:26:45,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:26:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 121 states have internal predecessors, (182), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-23 22:26:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-11-23 22:26:45,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:26:45,316 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:45,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:26:45,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 715788858, now seen corresponding path program 1 times [2023-11-23 22:26:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:45,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046753327] [2023-11-23 22:26:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:45,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:45,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046753327] [2023-11-23 22:26:45,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:26:45,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247553997] [2023-11-23 22:26:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:45,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:45,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:45,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:45,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:26:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:46,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 22:26:46,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2023-11-23 22:26:46,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:26:46,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247553997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:26:46,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:26:46,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:26:46,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550046963] [2023-11-23 22:26:46,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:26:46,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:26:46,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:26:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:26:46,412 INFO L87 Difference]: Start difference. First operand has 184 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 121 states have internal predecessors, (182), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-23 22:26:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:46,508 INFO L93 Difference]: Finished difference Result 364 states and 665 transitions. [2023-11-23 22:26:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:26:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) Word has length 384 [2023-11-23 22:26:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:26:46,525 INFO L225 Difference]: With dead ends: 364 [2023-11-23 22:26:46,526 INFO L226 Difference]: Without dead ends: 181 [2023-11-23 22:26:46,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:26:46,537 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:26:46,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 292 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:26:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-23 22:26:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-23 22:26:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 118 states have (on average 1.4661016949152543) internal successors, (173), 118 states have internal predecessors, (173), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-23 22:26:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions. [2023-11-23 22:26:46,651 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 384 [2023-11-23 22:26:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:26:46,653 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 295 transitions. [2023-11-23 22:26:46,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-23 22:26:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions. [2023-11-23 22:26:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-11-23 22:26:46,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:26:46,668 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:46,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:46,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:26:46,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:26:46,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:46,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1603658866, now seen corresponding path program 1 times [2023-11-23 22:26:46,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:46,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080153234] [2023-11-23 22:26:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:46,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:47,108 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:26:47,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011475896] [2023-11-23 22:26:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:47,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:47,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:47,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:47,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:26:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:47,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:26:47,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-23 22:26:48,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:26:48,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:48,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080153234] [2023-11-23 22:26:48,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:26:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011475896] [2023-11-23 22:26:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011475896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:26:48,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:26:48,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:26:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637693864] [2023-11-23 22:26:48,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:26:48,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:26:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:26:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:26:48,376 INFO L87 Difference]: Start difference. First operand 181 states and 295 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-23 22:26:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:48,881 INFO L93 Difference]: Finished difference Result 596 states and 972 transitions. [2023-11-23 22:26:48,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:26:48,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 384 [2023-11-23 22:26:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:26:48,892 INFO L225 Difference]: With dead ends: 596 [2023-11-23 22:26:48,892 INFO L226 Difference]: Without dead ends: 416 [2023-11-23 22:26:48,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:26:48,896 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 371 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:26:48,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1266 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:26:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-23 22:26:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 359. [2023-11-23 22:26:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 234 states have (on average 1.4658119658119657) internal successors, (343), 234 states have internal predecessors, (343), 122 states have call successors, (122), 2 states have call predecessors, (122), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-23 22:26:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 587 transitions. [2023-11-23 22:26:48,994 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 587 transitions. Word has length 384 [2023-11-23 22:26:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:26:48,997 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 587 transitions. [2023-11-23 22:26:48,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-23 22:26:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 587 transitions. [2023-11-23 22:26:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2023-11-23 22:26:49,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:26:49,009 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:49,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:49,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:49,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:26:49,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:49,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1870791954, now seen corresponding path program 1 times [2023-11-23 22:26:49,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:49,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062925192] [2023-11-23 22:26:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:49,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:49,354 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:26:49,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557945591] [2023-11-23 22:26:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:49,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:49,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:49,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:49,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:26:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:49,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:26:49,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-23 22:26:49,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:26:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062925192] [2023-11-23 22:26:49,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:26:49,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557945591] [2023-11-23 22:26:49,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557945591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:26:49,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:26:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:26:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000924444] [2023-11-23 22:26:49,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:26:49,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:26:49,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:26:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:26:49,782 INFO L87 Difference]: Start difference. First operand 359 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-23 22:26:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:49,991 INFO L93 Difference]: Finished difference Result 1059 states and 1729 transitions. [2023-11-23 22:26:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:26:49,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 385 [2023-11-23 22:26:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:26:50,003 INFO L225 Difference]: With dead ends: 1059 [2023-11-23 22:26:50,003 INFO L226 Difference]: Without dead ends: 701 [2023-11-23 22:26:50,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:26:50,007 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 263 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:26:50,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 753 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:26:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2023-11-23 22:26:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 421. [2023-11-23 22:26:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 296 states have (on average 1.4493243243243243) internal successors, (429), 296 states have internal predecessors, (429), 122 states have call successors, (122), 2 states have call predecessors, (122), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-23 22:26:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 673 transitions. [2023-11-23 22:26:50,110 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 673 transitions. Word has length 385 [2023-11-23 22:26:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:26:50,112 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 673 transitions. [2023-11-23 22:26:50,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-23 22:26:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 673 transitions. [2023-11-23 22:26:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2023-11-23 22:26:50,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:26:50,119 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:50,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:50,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:50,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:26:50,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2138778072, now seen corresponding path program 1 times [2023-11-23 22:26:50,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:50,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969692152] [2023-11-23 22:26:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:50,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:50,489 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:26:50,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455087132] [2023-11-23 22:26:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:50,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:50,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:50,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:26:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:50,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:26:50,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 858 proven. 9 refuted. 0 times theorem prover too weak. 6453 trivial. 0 not checked. [2023-11-23 22:26:51,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:26:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-23 22:26:51,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:51,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969692152] [2023-11-23 22:26:51,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:26:51,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455087132] [2023-11-23 22:26:51,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455087132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:26:51,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:26:51,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-23 22:26:51,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272710234] [2023-11-23 22:26:51,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:26:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:26:51,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:51,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:26:51,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:26:51,504 INFO L87 Difference]: Start difference. First operand 421 states and 673 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-23 22:26:52,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:52,896 INFO L93 Difference]: Finished difference Result 912 states and 1440 transitions. [2023-11-23 22:26:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:26:52,897 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 385 [2023-11-23 22:26:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:26:52,905 INFO L225 Difference]: With dead ends: 912 [2023-11-23 22:26:52,905 INFO L226 Difference]: Without dead ends: 492 [2023-11-23 22:26:52,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 761 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-23 22:26:52,912 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 599 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:26:52,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 900 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 22:26:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-11-23 22:26:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 466. [2023-11-23 22:26:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 276 states have (on average 1.3007246376811594) internal successors, (359), 277 states have internal predecessors, (359), 183 states have call successors, (183), 6 states have call predecessors, (183), 6 states have return successors, (183), 182 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-23 22:26:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 725 transitions. [2023-11-23 22:26:53,063 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 725 transitions. Word has length 385 [2023-11-23 22:26:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:26:53,064 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 725 transitions. [2023-11-23 22:26:53,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-23 22:26:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 725 transitions. [2023-11-23 22:26:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-11-23 22:26:53,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:26:53,071 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:53,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:53,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:53,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:26:53,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1832096984, now seen corresponding path program 1 times [2023-11-23 22:26:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:53,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232469266] [2023-11-23 22:26:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:53,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:26:53,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918206706] [2023-11-23 22:26:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:53,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:53,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:53,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:26:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:53,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:26:53,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-23 22:26:53,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:26:53,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:53,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232469266] [2023-11-23 22:26:53,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:26:53,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918206706] [2023-11-23 22:26:53,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918206706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:26:53,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:26:53,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:26:53,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176785654] [2023-11-23 22:26:53,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:26:53,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:26:53,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:26:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:26:53,788 INFO L87 Difference]: Start difference. First operand 466 states and 725 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-23 22:26:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:54,368 INFO L93 Difference]: Finished difference Result 846 states and 1320 transitions. [2023-11-23 22:26:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:26:54,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 386 [2023-11-23 22:26:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:26:54,374 INFO L225 Difference]: With dead ends: 846 [2023-11-23 22:26:54,375 INFO L226 Difference]: Without dead ends: 486 [2023-11-23 22:26:54,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:26:54,377 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 509 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:26:54,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 626 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:26:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-11-23 22:26:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 466. [2023-11-23 22:26:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 276 states have (on average 1.2934782608695652) internal successors, (357), 277 states have internal predecessors, (357), 183 states have call successors, (183), 6 states have call predecessors, (183), 6 states have return successors, (183), 182 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-23 22:26:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 723 transitions. [2023-11-23 22:26:54,487 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 723 transitions. Word has length 386 [2023-11-23 22:26:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:26:54,488 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 723 transitions. [2023-11-23 22:26:54,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-23 22:26:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 723 transitions. [2023-11-23 22:26:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-11-23 22:26:54,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:26:54,493 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:54,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:54,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:54,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:26:54,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1770057370, now seen corresponding path program 1 times [2023-11-23 22:26:54,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:54,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452988250] [2023-11-23 22:26:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:54,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:54,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:26:54,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382835965] [2023-11-23 22:26:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:54,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:54,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:54,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:54,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:26:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:55,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:26:55,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:26:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3018 proven. 129 refuted. 0 times theorem prover too weak. 4173 trivial. 0 not checked. [2023-11-23 22:26:55,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:26:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 51 proven. 129 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-23 22:26:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:26:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452988250] [2023-11-23 22:26:56,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:26:56,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382835965] [2023-11-23 22:26:56,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382835965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:26:56,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:26:56,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-23 22:26:56,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375741662] [2023-11-23 22:26:56,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:26:56,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:26:56,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:26:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:26:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:26:56,240 INFO L87 Difference]: Start difference. First operand 466 states and 723 transitions. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-23 22:26:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:26:56,713 INFO L93 Difference]: Finished difference Result 844 states and 1296 transitions. [2023-11-23 22:26:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:26:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) Word has length 386 [2023-11-23 22:26:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:26:56,722 INFO L225 Difference]: With dead ends: 844 [2023-11-23 22:26:56,722 INFO L226 Difference]: Without dead ends: 484 [2023-11-23 22:26:56,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 764 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:26:56,725 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 117 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:26:56,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 492 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:26:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-11-23 22:26:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 478. [2023-11-23 22:26:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 285 states have (on average 1.2771929824561403) internal successors, (364), 286 states have internal predecessors, (364), 183 states have call successors, (183), 9 states have call predecessors, (183), 9 states have return successors, (183), 182 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-23 22:26:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 730 transitions. [2023-11-23 22:26:56,825 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 730 transitions. Word has length 386 [2023-11-23 22:26:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:26:56,826 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 730 transitions. [2023-11-23 22:26:56,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-23 22:26:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 730 transitions. [2023-11-23 22:26:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-11-23 22:26:56,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:26:56,831 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:26:56,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:26:57,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:26:57,055 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:26:57,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:26:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1503841572, now seen corresponding path program 1 times [2023-11-23 22:26:57,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:26:57,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187934789] [2023-11-23 22:26:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:57,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:26:57,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:26:57,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718805076] [2023-11-23 22:26:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:26:57,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:26:57,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:26:57,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:26:57,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:26:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:26:57,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 22:26:57,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2079 proven. 576 refuted. 0 times theorem prover too weak. 4665 trivial. 0 not checked. [2023-11-23 22:27:02,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 84 proven. 447 refuted. 0 times theorem prover too weak. 6789 trivial. 0 not checked. [2023-11-23 22:27:07,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:07,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187934789] [2023-11-23 22:27:07,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:07,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718805076] [2023-11-23 22:27:07,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718805076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:07,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:27:07,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2023-11-23 22:27:07,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667195157] [2023-11-23 22:27:07,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:07,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 22:27:07,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:07,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 22:27:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 22:27:07,201 INFO L87 Difference]: Start difference. First operand 478 states and 730 transitions. Second operand has 36 states, 34 states have (on average 5.4411764705882355) internal successors, (185), 32 states have internal predecessors, (185), 10 states have call successors, (122), 6 states have call predecessors, (122), 10 states have return successors, (122), 10 states have call predecessors, (122), 10 states have call successors, (122) [2023-11-23 22:27:19,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:19,025 INFO L93 Difference]: Finished difference Result 2101 states and 3124 transitions. [2023-11-23 22:27:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-23 22:27:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 5.4411764705882355) internal successors, (185), 32 states have internal predecessors, (185), 10 states have call successors, (122), 6 states have call predecessors, (122), 10 states have return successors, (122), 10 states have call predecessors, (122), 10 states have call successors, (122) Word has length 386 [2023-11-23 22:27:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:19,048 INFO L225 Difference]: With dead ends: 2101 [2023-11-23 22:27:19,049 INFO L226 Difference]: Without dead ends: 1733 [2023-11-23 22:27:19,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 744 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2321, Invalid=10561, Unknown=0, NotChecked=0, Total=12882 [2023-11-23 22:27:19,059 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 1749 mSDsluCounter, 3927 mSDsCounter, 0 mSdLazyCounter, 4268 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 4144 SdHoareTripleChecker+Invalid, 4888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 4268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:19,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1780 Valid, 4144 Invalid, 4888 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [620 Valid, 4268 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-23 22:27:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2023-11-23 22:27:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 747. [2023-11-23 22:27:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 525 states have (on average 1.3428571428571427) internal successors, (705), 527 states have internal predecessors, (705), 205 states have call successors, (205), 16 states have call predecessors, (205), 16 states have return successors, (205), 203 states have call predecessors, (205), 205 states have call successors, (205) [2023-11-23 22:27:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1115 transitions. [2023-11-23 22:27:19,348 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1115 transitions. Word has length 386 [2023-11-23 22:27:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:19,349 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1115 transitions. [2023-11-23 22:27:19,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 5.4411764705882355) internal successors, (185), 32 states have internal predecessors, (185), 10 states have call successors, (122), 6 states have call predecessors, (122), 10 states have return successors, (122), 10 states have call predecessors, (122), 10 states have call successors, (122) [2023-11-23 22:27:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1115 transitions. [2023-11-23 22:27:19,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-11-23 22:27:19,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:19,355 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:19,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:19,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:27:19,569 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:19,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1255695078, now seen corresponding path program 1 times [2023-11-23 22:27:19,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:19,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431333029] [2023-11-23 22:27:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:19,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:19,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:19,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665685428] [2023-11-23 22:27:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:19,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:19,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:19,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:19,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9730606-484e-4816-873d-63fb6b3834d2/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:27:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:20,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 22:27:20,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3454 proven. 405 refuted. 0 times theorem prover too weak. 3461 trivial. 0 not checked. [2023-11-23 22:27:23,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:24,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:24,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431333029] [2023-11-23 22:27:24,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:24,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665685428] [2023-11-23 22:27:24,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665685428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:24,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:27:24,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-23 22:27:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347800493] [2023-11-23 22:27:24,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:27:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:27:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:27:24,414 INFO L87 Difference]: Start difference. First operand 747 states and 1115 transitions. Second operand has 15 states, 15 states have (on average 6.8) internal successors, (102), 14 states have internal predecessors, (102), 5 states have call successors, (61), 5 states have call predecessors, (61), 7 states have return successors, (61), 5 states have call predecessors, (61), 5 states have call successors, (61)