./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:01:08,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:01:08,780 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:01:08,785 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:01:08,786 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:01:08,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:01:08,829 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:01:08,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:01:08,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:01:08,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:01:08,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:01:08,832 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:01:08,833 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:01:08,834 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:01:08,834 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:01:08,835 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:01:08,835 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:01:08,836 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:01:08,836 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:01:08,837 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:01:08,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:01:08,838 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:01:08,838 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:01:08,839 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:01:08,839 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:01:08,840 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:01:08,840 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:01:08,841 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:01:08,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:08,842 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:01:08,842 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:01:08,842 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:01:08,843 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:01:08,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:01:08,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:01:08,844 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:01:08,845 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:01:08,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:01:08,845 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:01:08,846 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_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2023-11-06 23:01:09,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:01:09,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:01:09,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:01:09,240 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:01:09,240 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:01:09,242 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2023-11-06 23:01:12,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:01:12,926 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:01:12,927 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2023-11-06 23:01:12,950 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/data/bed5b1dd4/fd68642780f8415a99d5af60fc51a27b/FLAG74c1f88c0 [2023-11-06 23:01:13,030 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/data/bed5b1dd4/fd68642780f8415a99d5af60fc51a27b [2023-11-06 23:01:13,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:01:13,034 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:01:13,036 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:13,036 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:01:13,042 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:01:13,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:13" (1/1) ... [2023-11-06 23:01:13,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297a6104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:13, skipping insertion in model container [2023-11-06 23:01:13,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:13" (1/1) ... [2023-11-06 23:01:13,151 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:01:13,730 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_086c69bc-aed2-47f6-9f68-fbc0073737a0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2023-11-06 23:01:14,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:14,131 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:01:14,180 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_086c69bc-aed2-47f6-9f68-fbc0073737a0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2023-11-06 23:01:14,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:14,444 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:01:14,454 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:01:14,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14 WrapperNode [2023-11-06 23:01:14,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:14,457 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:14,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:01:14,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:01:14,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,561 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,717 INFO L138 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3443 [2023-11-06 23:01:14,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:14,718 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:01:14,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:01:14,719 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:01:14,730 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,752 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,752 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,969 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:14,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:15,010 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:01:15,011 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:01:15,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:01:15,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:01:15,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (1/1) ... [2023-11-06 23:01:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:15,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:15,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:01:15,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:01:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2023-11-06 23:01:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2023-11-06 23:01:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:01:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 23:01:15,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 23:01:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:01:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-06 23:01:15,124 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-06 23:01:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:01:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:01:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 23:01:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:01:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-06 23:01:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 23:01:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:01:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:01:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:01:15,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:01:15,542 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:01:15,545 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:01:19,704 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:01:19,725 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:01:19,725 INFO L302 CfgBuilder]: Removed 168 assume(true) statements. [2023-11-06 23:01:19,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:19 BoogieIcfgContainer [2023-11-06 23:01:19,731 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:01:19,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:01:19,734 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:01:19,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:01:19,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:13" (1/3) ... [2023-11-06 23:01:19,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3e4a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:19, skipping insertion in model container [2023-11-06 23:01:19,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:14" (2/3) ... [2023-11-06 23:01:19,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3e4a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:19, skipping insertion in model container [2023-11-06 23:01:19,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:19" (3/3) ... [2023-11-06 23:01:19,743 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-3.i [2023-11-06 23:01:19,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:01:19,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:01:19,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:01:19,885 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=LoopsAndPotentialCycles, 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;@719b9892, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:01:19,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:01:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 970 states, 951 states have (on average 1.7097791798107256) internal successors, (1626), 956 states have internal predecessors, (1626), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-06 23:01:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 23:01:19,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:19,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:19,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:19,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash 808012131, now seen corresponding path program 1 times [2023-11-06 23:01:19,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:19,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421525052] [2023-11-06 23:01:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:20,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421525052] [2023-11-06 23:01:20,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421525052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:20,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:20,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:20,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108483690] [2023-11-06 23:01:20,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:20,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:01:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:01:20,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:01:20,345 INFO L87 Difference]: Start difference. First operand has 970 states, 951 states have (on average 1.7097791798107256) internal successors, (1626), 956 states have internal predecessors, (1626), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:20,564 INFO L93 Difference]: Finished difference Result 1938 states and 3314 transitions. [2023-11-06 23:01:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:01:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 23:01:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:20,595 INFO L225 Difference]: With dead ends: 1938 [2023-11-06 23:01:20,595 INFO L226 Difference]: Without dead ends: 906 [2023-11-06 23:01:20,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:01:20,611 INFO L413 NwaCegarLoop]: 1478 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:20,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:01:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-06 23:01:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 906. [2023-11-06 23:01:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 888 states have (on average 1.5360360360360361) internal successors, (1364), 893 states have internal predecessors, (1364), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:01:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1391 transitions. [2023-11-06 23:01:20,777 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1391 transitions. Word has length 13 [2023-11-06 23:01:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:20,778 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1391 transitions. [2023-11-06 23:01:20,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1391 transitions. [2023-11-06 23:01:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-06 23:01:20,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:20,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:20,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:01:20,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:20,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:20,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2062652801, now seen corresponding path program 1 times [2023-11-06 23:01:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:20,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191916328] [2023-11-06 23:01:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:20,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:21,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:21,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191916328] [2023-11-06 23:01:21,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191916328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:21,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:21,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:21,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955748753] [2023-11-06 23:01:21,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:21,436 INFO L87 Difference]: Start difference. First operand 906 states and 1391 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:22,941 INFO L93 Difference]: Finished difference Result 1685 states and 2613 transitions. [2023-11-06 23:01:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:22,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-06 23:01:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:22,956 INFO L225 Difference]: With dead ends: 1685 [2023-11-06 23:01:22,956 INFO L226 Difference]: Without dead ends: 1127 [2023-11-06 23:01:22,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:22,971 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 351 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 3947 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:22,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 3947 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 23:01:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-11-06 23:01:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 908. [2023-11-06 23:01:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 890 states have (on average 1.5348314606741573) internal successors, (1366), 895 states have internal predecessors, (1366), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:01:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1393 transitions. [2023-11-06 23:01:23,024 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1393 transitions. Word has length 68 [2023-11-06 23:01:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:23,024 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1393 transitions. [2023-11-06 23:01:23,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1393 transitions. [2023-11-06 23:01:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 23:01:23,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:23,040 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:23,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:01:23,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:23,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash 692503993, now seen corresponding path program 1 times [2023-11-06 23:01:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:23,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529364613] [2023-11-06 23:01:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:23,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:23,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:23,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791789905] [2023-11-06 23:01:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:23,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:23,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:23,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:01:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:23,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:01:23,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:23,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:23,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:23,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529364613] [2023-11-06 23:01:23,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:23,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791789905] [2023-11-06 23:01:23,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791789905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:23,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:23,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:23,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415421108] [2023-11-06 23:01:23,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:23,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:23,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:23,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:23,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:23,871 INFO L87 Difference]: Start difference. First operand 908 states and 1393 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:24,083 INFO L93 Difference]: Finished difference Result 1833 states and 2813 transitions. [2023-11-06 23:01:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 23:01:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:24,093 INFO L225 Difference]: With dead ends: 1833 [2023-11-06 23:01:24,093 INFO L226 Difference]: Without dead ends: 929 [2023-11-06 23:01:24,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:24,097 INFO L413 NwaCegarLoop]: 1371 mSDtfsCounter, 9 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:24,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2727 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:01:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2023-11-06 23:01:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 928. [2023-11-06 23:01:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 910 states have (on average 1.523076923076923) internal successors, (1386), 915 states have internal predecessors, (1386), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:01:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1413 transitions. [2023-11-06 23:01:24,143 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1413 transitions. Word has length 145 [2023-11-06 23:01:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:24,145 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1413 transitions. [2023-11-06 23:01:24,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1413 transitions. [2023-11-06 23:01:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 23:01:24,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:24,150 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:24,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:24,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:24,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:24,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -600135371, now seen corresponding path program 1 times [2023-11-06 23:01:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:24,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765749621] [2023-11-06 23:01:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:24,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:24,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243627416] [2023-11-06 23:01:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:24,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:24,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:24,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:01:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:25,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:01:25,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:25,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:25,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:25,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765749621] [2023-11-06 23:01:25,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:25,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243627416] [2023-11-06 23:01:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243627416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:25,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:25,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:25,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656435022] [2023-11-06 23:01:25,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:25,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:25,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:25,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:25,166 INFO L87 Difference]: Start difference. First operand 928 states and 1413 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:25,311 INFO L93 Difference]: Finished difference Result 1459 states and 2233 transitions. [2023-11-06 23:01:25,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:25,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 23:01:25,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:25,321 INFO L225 Difference]: With dead ends: 1459 [2023-11-06 23:01:25,321 INFO L226 Difference]: Without dead ends: 949 [2023-11-06 23:01:25,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:25,324 INFO L413 NwaCegarLoop]: 1371 mSDtfsCounter, 9 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:25,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2727 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:01:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2023-11-06 23:01:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 948. [2023-11-06 23:01:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 930 states have (on average 1.5118279569892472) internal successors, (1406), 935 states have internal predecessors, (1406), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:01:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1433 transitions. [2023-11-06 23:01:25,363 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1433 transitions. Word has length 145 [2023-11-06 23:01:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:25,365 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1433 transitions. [2023-11-06 23:01:25,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1433 transitions. [2023-11-06 23:01:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 23:01:25,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:25,369 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:25,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:25,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:25,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:25,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1755669879, now seen corresponding path program 1 times [2023-11-06 23:01:25,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:25,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886180237] [2023-11-06 23:01:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:25,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:25,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:25,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548630565] [2023-11-06 23:01:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:25,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:25,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:25,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:25,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:01:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:26,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:01:26,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:26,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:26,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:26,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886180237] [2023-11-06 23:01:26,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:26,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548630565] [2023-11-06 23:01:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548630565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:26,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:26,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:26,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577251320] [2023-11-06 23:01:26,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:26,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:26,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:26,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:26,342 INFO L87 Difference]: Start difference. First operand 948 states and 1433 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:26,496 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2023-11-06 23:01:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 23:01:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:26,507 INFO L225 Difference]: With dead ends: 1879 [2023-11-06 23:01:26,507 INFO L226 Difference]: Without dead ends: 935 [2023-11-06 23:01:26,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:26,511 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 165 mSDsluCounter, 2574 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3938 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:26,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3938 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:01:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2023-11-06 23:01:26,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 934. [2023-11-06 23:01:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 916 states have (on average 1.512008733624454) internal successors, (1385), 921 states have internal predecessors, (1385), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:01:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1412 transitions. [2023-11-06 23:01:26,553 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1412 transitions. Word has length 145 [2023-11-06 23:01:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:26,556 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1412 transitions. [2023-11-06 23:01:26,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1412 transitions. [2023-11-06 23:01:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 23:01:26,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:26,560 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:26,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:26,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:26,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:26,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:26,768 INFO L85 PathProgramCache]: Analyzing trace with hash 834990341, now seen corresponding path program 1 times [2023-11-06 23:01:26,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:26,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400813660] [2023-11-06 23:01:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:26,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:26,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190883999] [2023-11-06 23:01:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:26,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:26,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:26,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:26,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:01:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:27,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:01:27,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:27,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400813660] [2023-11-06 23:01:27,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190883999] [2023-11-06 23:01:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190883999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:27,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:27,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281696776] [2023-11-06 23:01:27,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:27,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:27,353 INFO L87 Difference]: Start difference. First operand 934 states and 1412 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:27,482 INFO L93 Difference]: Finished difference Result 1433 states and 2181 transitions. [2023-11-06 23:01:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:27,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 23:01:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:27,490 INFO L225 Difference]: With dead ends: 1433 [2023-11-06 23:01:27,490 INFO L226 Difference]: Without dead ends: 921 [2023-11-06 23:01:27,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:27,492 INFO L413 NwaCegarLoop]: 1357 mSDtfsCounter, 165 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3917 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:27,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3917 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:01:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-11-06 23:01:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 920. [2023-11-06 23:01:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 902 states have (on average 1.5121951219512195) internal successors, (1364), 907 states have internal predecessors, (1364), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:01:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1391 transitions. [2023-11-06 23:01:27,523 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1391 transitions. Word has length 145 [2023-11-06 23:01:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:27,524 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1391 transitions. [2023-11-06 23:01:27,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1391 transitions. [2023-11-06 23:01:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 23:01:27,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:27,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:27,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:27,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:01:27,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:27,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1479826889, now seen corresponding path program 1 times [2023-11-06 23:01:27,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:27,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851298482] [2023-11-06 23:01:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:27,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:27,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:27,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264513427] [2023-11-06 23:01:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:27,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:27,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:27,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:01:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:28,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:01:28,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:28,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:28,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:28,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851298482] [2023-11-06 23:01:28,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:28,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264513427] [2023-11-06 23:01:28,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264513427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:28,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:28,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:28,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821259769] [2023-11-06 23:01:28,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:28,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:28,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:28,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:28,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:28,673 INFO L87 Difference]: Start difference. First operand 920 states and 1391 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:28,822 INFO L93 Difference]: Finished difference Result 2377 states and 3611 transitions. [2023-11-06 23:01:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 23:01:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:28,834 INFO L225 Difference]: With dead ends: 2377 [2023-11-06 23:01:28,835 INFO L226 Difference]: Without dead ends: 1461 [2023-11-06 23:01:28,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:28,840 INFO L413 NwaCegarLoop]: 1552 mSDtfsCounter, 765 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:28,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 2901 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:01:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2023-11-06 23:01:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1456. [2023-11-06 23:01:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1433 states have (on average 1.5212840195394277) internal successors, (2180), 1438 states have internal predecessors, (2180), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 23:01:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2217 transitions. [2023-11-06 23:01:28,904 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2217 transitions. Word has length 145 [2023-11-06 23:01:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:28,907 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 2217 transitions. [2023-11-06 23:01:28,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2217 transitions. [2023-11-06 23:01:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-06 23:01:28,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:28,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:28,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:29,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:29,123 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:29,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash -24874315, now seen corresponding path program 1 times [2023-11-06 23:01:29,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:29,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972140784] [2023-11-06 23:01:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:29,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:29,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928859768] [2023-11-06 23:01:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:29,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:29,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:29,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:01:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:29,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:01:29,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:29,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:01:29,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 23:01:29,834 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:01:29,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:01:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:29,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:01:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:01:29,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:29,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972140784] [2023-11-06 23:01:29,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:29,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928859768] [2023-11-06 23:01:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928859768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:29,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:29,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:01:29,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571969462] [2023-11-06 23:01:29,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:29,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:01:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:01:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:29,915 INFO L87 Difference]: Start difference. First operand 1456 states and 2217 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:01:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:31,309 INFO L93 Difference]: Finished difference Result 2737 states and 4171 transitions. [2023-11-06 23:01:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:01:31,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 160 [2023-11-06 23:01:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:31,319 INFO L225 Difference]: With dead ends: 2737 [2023-11-06 23:01:31,320 INFO L226 Difference]: Without dead ends: 1456 [2023-11-06 23:01:31,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:01:31,323 INFO L413 NwaCegarLoop]: 1353 mSDtfsCounter, 351 mSDsluCounter, 3782 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 5135 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:31,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 5135 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 23:01:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2023-11-06 23:01:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1456. [2023-11-06 23:01:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1433 states have (on average 1.520586182833217) internal successors, (2179), 1438 states have internal predecessors, (2179), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 23:01:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2216 transitions. [2023-11-06 23:01:31,377 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2216 transitions. Word has length 160 [2023-11-06 23:01:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:31,378 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 2216 transitions. [2023-11-06 23:01:31,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:01:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2216 transitions. [2023-11-06 23:01:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-06 23:01:31,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:31,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:31,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:31,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:31,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:31,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1774057576, now seen corresponding path program 1 times [2023-11-06 23:01:31,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:31,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389092676] [2023-11-06 23:01:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:31,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:31,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:31,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328116400] [2023-11-06 23:01:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:31,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:31,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:31,706 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:31,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:01:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:32,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:01:32,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:01:32,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:32,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:32,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389092676] [2023-11-06 23:01:32,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:32,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328116400] [2023-11-06 23:01:32,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328116400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:32,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:32,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059750112] [2023-11-06 23:01:32,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:32,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:32,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:32,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:32,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:32,379 INFO L87 Difference]: Start difference. First operand 1456 states and 2216 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:01:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:32,495 INFO L93 Difference]: Finished difference Result 2900 states and 4410 transitions. [2023-11-06 23:01:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:32,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 231 [2023-11-06 23:01:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:32,506 INFO L225 Difference]: With dead ends: 2900 [2023-11-06 23:01:32,506 INFO L226 Difference]: Without dead ends: 1498 [2023-11-06 23:01:32,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:32,511 INFO L413 NwaCegarLoop]: 1357 mSDtfsCounter, 9 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:32,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2699 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:01:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2023-11-06 23:01:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1496. [2023-11-06 23:01:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1473 states have (on average 1.5064494229463679) internal successors, (2219), 1478 states have internal predecessors, (2219), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 23:01:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2256 transitions. [2023-11-06 23:01:32,608 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2256 transitions. Word has length 231 [2023-11-06 23:01:32,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:32,609 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2256 transitions. [2023-11-06 23:01:32,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:01:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2256 transitions. [2023-11-06 23:01:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-06 23:01:32,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:32,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:32,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:32,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:32,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1528249702, now seen corresponding path program 1 times [2023-11-06 23:01:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:32,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131012404] [2023-11-06 23:01:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:32,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:32,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:32,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350664283] [2023-11-06 23:01:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:32,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:32,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:32,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:32,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:01:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:33,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:01:33,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:01:33,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131012404] [2023-11-06 23:01:33,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:33,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350664283] [2023-11-06 23:01:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350664283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:33,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:33,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500700708] [2023-11-06 23:01:33,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:33,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:33,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:33,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:33,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:33,703 INFO L87 Difference]: Start difference. First operand 1496 states and 2256 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:01:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:33,833 INFO L93 Difference]: Finished difference Result 2894 states and 4375 transitions. [2023-11-06 23:01:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 231 [2023-11-06 23:01:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:33,844 INFO L225 Difference]: With dead ends: 2894 [2023-11-06 23:01:33,844 INFO L226 Difference]: Without dead ends: 1470 [2023-11-06 23:01:33,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:33,848 INFO L413 NwaCegarLoop]: 1350 mSDtfsCounter, 165 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3896 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:33,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3896 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:01:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2023-11-06 23:01:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1468. [2023-11-06 23:01:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1445 states have (on average 1.5065743944636678) internal successors, (2177), 1450 states have internal predecessors, (2177), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 23:01:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2214 transitions. [2023-11-06 23:01:33,904 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2214 transitions. Word has length 231 [2023-11-06 23:01:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:33,904 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 2214 transitions. [2023-11-06 23:01:33,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:01:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2214 transitions. [2023-11-06 23:01:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-06 23:01:33,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:33,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:33,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 23:01:34,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:34,119 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:34,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash 541071988, now seen corresponding path program 1 times [2023-11-06 23:01:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:34,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807799588] [2023-11-06 23:01:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:34,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:34,215 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:34,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203229061] [2023-11-06 23:01:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:34,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:34,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:34,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:34,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:01:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:34,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:01:34,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:01:35,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:35,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:35,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807799588] [2023-11-06 23:01:35,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:35,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203229061] [2023-11-06 23:01:35,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203229061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:35,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:35,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:35,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637751309] [2023-11-06 23:01:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:35,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:35,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:35,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:35,182 INFO L87 Difference]: Start difference. First operand 1468 states and 2214 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:01:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:35,296 INFO L93 Difference]: Finished difference Result 3423 states and 5208 transitions. [2023-11-06 23:01:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:35,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 231 [2023-11-06 23:01:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:35,312 INFO L225 Difference]: With dead ends: 3423 [2023-11-06 23:01:35,312 INFO L226 Difference]: Without dead ends: 2086 [2023-11-06 23:01:35,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:35,315 INFO L413 NwaCegarLoop]: 1368 mSDtfsCounter, 725 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:35,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 2710 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:01:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2023-11-06 23:01:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1831. [2023-11-06 23:01:35,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1805 states have (on average 1.5196675900277008) internal successors, (2743), 1810 states have internal predecessors, (2743), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-06 23:01:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2786 transitions. [2023-11-06 23:01:35,388 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2786 transitions. Word has length 231 [2023-11-06 23:01:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:35,389 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 2786 transitions. [2023-11-06 23:01:35,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:01:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2786 transitions. [2023-11-06 23:01:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-06 23:01:35,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:35,394 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:35,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:35,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:35,610 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:35,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:35,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1616393105, now seen corresponding path program 1 times [2023-11-06 23:01:35,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:35,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682202416] [2023-11-06 23:01:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:35,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:35,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131684156] [2023-11-06 23:01:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:35,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:35,772 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:35,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:01:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:36,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:01:36,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 23:01:36,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682202416] [2023-11-06 23:01:36,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131684156] [2023-11-06 23:01:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131684156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:36,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:36,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:37,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882386506] [2023-11-06 23:01:37,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:37,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:37,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:37,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:37,002 INFO L87 Difference]: Start difference. First operand 1831 states and 2786 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 23:01:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:37,490 INFO L93 Difference]: Finished difference Result 2994 states and 4554 transitions. [2023-11-06 23:01:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 246 [2023-11-06 23:01:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:37,503 INFO L225 Difference]: With dead ends: 2994 [2023-11-06 23:01:37,503 INFO L226 Difference]: Without dead ends: 1457 [2023-11-06 23:01:37,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:37,506 INFO L413 NwaCegarLoop]: 1466 mSDtfsCounter, 2420 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:37,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2420 Valid, 1717 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:01:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2023-11-06 23:01:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1457. [2023-11-06 23:01:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1436 states have (on average 1.506267409470752) internal successors, (2163), 1441 states have internal predecessors, (2163), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 23:01:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2196 transitions. [2023-11-06 23:01:37,566 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2196 transitions. Word has length 246 [2023-11-06 23:01:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:37,567 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 2196 transitions. [2023-11-06 23:01:37,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 23:01:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2196 transitions. [2023-11-06 23:01:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-06 23:01:37,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:37,573 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:37,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:37,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:01:37,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:37,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1328233788, now seen corresponding path program 1 times [2023-11-06 23:01:37,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:37,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013804667] [2023-11-06 23:01:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:37,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:37,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842604626] [2023-11-06 23:01:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:37,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:37,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:37,890 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:01:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:38,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:01:38,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:39,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:01:39,710 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:01:39,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-06 23:01:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 23:01:39,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:39,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:39,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013804667] [2023-11-06 23:01:39,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:39,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842604626] [2023-11-06 23:01:39,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842604626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:39,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:39,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 23:01:39,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431482944] [2023-11-06 23:01:39,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:39,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:01:39,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:39,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:01:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:01:39,913 INFO L87 Difference]: Start difference. First operand 1457 states and 2196 transitions. Second operand has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 23:01:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:43,567 INFO L93 Difference]: Finished difference Result 2231 states and 3385 transitions. [2023-11-06 23:01:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:01:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 256 [2023-11-06 23:01:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:43,578 INFO L225 Difference]: With dead ends: 2231 [2023-11-06 23:01:43,579 INFO L226 Difference]: Without dead ends: 1494 [2023-11-06 23:01:43,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:01:43,582 INFO L413 NwaCegarLoop]: 1327 mSDtfsCounter, 1207 mSDsluCounter, 8744 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 10071 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:43,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 10071 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 23:01:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-06 23:01:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1489. [2023-11-06 23:01:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1468 states have (on average 1.4986376021798364) internal successors, (2200), 1473 states have internal predecessors, (2200), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 23:01:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2233 transitions. [2023-11-06 23:01:43,667 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2233 transitions. Word has length 256 [2023-11-06 23:01:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:43,668 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 2233 transitions. [2023-11-06 23:01:43,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 23:01:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2233 transitions. [2023-11-06 23:01:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-06 23:01:43,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:43,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:43,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:43,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:01:43,895 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:43,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash -452214782, now seen corresponding path program 1 times [2023-11-06 23:01:43,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:43,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575228975] [2023-11-06 23:01:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:43,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:44,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:44,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471861574] [2023-11-06 23:01:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:44,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:44,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:44,019 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:44,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:01:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:44,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:01:44,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 23:01:44,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:44,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:44,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575228975] [2023-11-06 23:01:44,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:01:44,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471861574] [2023-11-06 23:01:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471861574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:44,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:44,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:44,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679653894] [2023-11-06 23:01:44,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:44,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:44,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:44,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:44,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:44,883 INFO L87 Difference]: Start difference. First operand 1489 states and 2233 transitions. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 23:01:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:44,976 INFO L93 Difference]: Finished difference Result 2231 states and 3384 transitions. [2023-11-06 23:01:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:44,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 256 [2023-11-06 23:01:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:44,986 INFO L225 Difference]: With dead ends: 2231 [2023-11-06 23:01:44,986 INFO L226 Difference]: Without dead ends: 1412 [2023-11-06 23:01:44,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:44,989 INFO L413 NwaCegarLoop]: 1280 mSDtfsCounter, 77 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3756 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:44,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 3756 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:01:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2023-11-06 23:01:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2023-11-06 23:01:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1391 states have (on average 1.498921639108555) internal successors, (2085), 1396 states have internal predecessors, (2085), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 23:01:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2118 transitions. [2023-11-06 23:01:45,041 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2118 transitions. Word has length 256 [2023-11-06 23:01:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:45,042 INFO L495 AbstractCegarLoop]: Abstraction has 1412 states and 2118 transitions. [2023-11-06 23:01:45,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 23:01:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2118 transitions. [2023-11-06 23:01:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-06 23:01:45,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:45,048 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:45,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:45,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:01:45,257 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:01:45,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2002857959, now seen corresponding path program 1 times [2023-11-06 23:01:45,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:45,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638726222] [2023-11-06 23:01:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:45,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:45,381 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:01:45,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668285043] [2023-11-06 23:01:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:45,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:45,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:45,383 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:45,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_086c69bc-aed2-47f6-9f68-fbc0073737a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:01:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:46,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 23:01:46,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:47,187 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:01:47,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 22