/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:55:17,104 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:55:17,139 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 10:55:17,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:55:17,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:55:17,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:55:17,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:55:17,156 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:55:17,156 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:55:17,156 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:55:17,157 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:55:17,157 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:55:17,157 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:55:17,157 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:55:17,158 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:55:17,158 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:55:17,158 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:55:17,158 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:55:17,159 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:55:17,159 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:55:17,159 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:55:17,159 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:55:17,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:55:17,160 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:55:17,160 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:55:17,160 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:55:17,161 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:55:17,161 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:55:17,161 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:55:17,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:55:17,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:55:17,162 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:55:17,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:55:17,162 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:55:17,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:55:17,162 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:55:17,163 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:55:17,163 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:55:17,163 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:55:17,163 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:55:17,163 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:55:17,163 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:55:17,163 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:55:17,164 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:55:17,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:55:17,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:55:17,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:55:17,347 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:55:17,348 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:55:17,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd3-ll.c [2023-12-21 10:55:18,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:55:18,464 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:55:18,464 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd3-ll.c [2023-12-21 10:55:18,469 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1498a15e/81e6ac9fcc6240d7a704fbc341334c80/FLAG651e439fb [2023-12-21 10:55:18,477 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1498a15e/81e6ac9fcc6240d7a704fbc341334c80 [2023-12-21 10:55:18,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:55:18,480 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:55:18,481 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:55:18,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:55:18,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:55:18,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f69ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18, skipping insertion in model container [2023-12-21 10:55:18,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,518 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:55:18,613 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2023-12-21 10:55:18,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:55:18,650 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:55:18,657 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2023-12-21 10:55:18,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:55:18,690 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:55:18,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18 WrapperNode [2023-12-21 10:55:18,690 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:55:18,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:55:18,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:55:18,692 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:55:18,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,726 INFO L138 Inliner]: procedures = 18, calls = 127, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 95 [2023-12-21 10:55:18,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:55:18,726 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:55:18,726 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:55:18,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:55:18,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,736 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,749 INFO L175 MemorySlicer]: Split 77 memory accesses to 13 slices as follows [7, 2, 6, 7, 6, 5, 6, 5, 6, 9, 6, 5, 7]. 12 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [1, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1]. [2023-12-21 10:55:18,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,760 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,761 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,764 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:55:18,765 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:55:18,765 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:55:18,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:55:18,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (1/1) ... [2023-12-21 10:55:18,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:55:18,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:18,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 10:55:18,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 10:55:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:55:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 10:55:18,810 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-12-21 10:55:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_47_to_56_0 [2023-12-21 10:55:18,812 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_47_to_56_0 [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_70_0 [2023-12-21 10:55:18,812 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_70_0 [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_59_0 [2023-12-21 10:55:18,812 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_59_0 [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 10:55:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:55:18,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:55:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2023-12-21 10:55:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 10:55:18,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 10:55:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 10:55:18,924 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:55:18,926 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:55:19,115 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:55:19,133 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:55:19,133 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-21 10:55:19,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:55:19 BoogieIcfgContainer [2023-12-21 10:55:19,133 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:55:19,135 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:55:19,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:55:19,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:55:19,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:55:18" (1/3) ... [2023-12-21 10:55:19,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6311f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:55:19, skipping insertion in model container [2023-12-21 10:55:19,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:18" (2/3) ... [2023-12-21 10:55:19,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6311f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:55:19, skipping insertion in model container [2023-12-21 10:55:19,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:55:19" (3/3) ... [2023-12-21 10:55:19,138 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd3-ll.c [2023-12-21 10:55:19,148 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:55:19,148 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:55:19,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:55:19,179 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f1daf5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:55:19,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:55:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-21 10:55:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 10:55:19,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:19,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:55:19,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:19,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1622724067, now seen corresponding path program 1 times [2023-12-21 10:55:19,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:19,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647753953] [2023-12-21 10:55:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:19,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:19,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647753953] [2023-12-21 10:55:19,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 10:55:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156279855] [2023-12-21 10:55:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:19,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:19,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:19,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:19,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 10:55:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:19,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 10:55:19,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 10:55:19,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:55:19,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156279855] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:55:19,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:55:19,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 10:55:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135776198] [2023-12-21 10:55:19,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:55:19,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 10:55:19,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 10:55:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 10:55:19,536 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-21 10:55:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:19,576 INFO L93 Difference]: Finished difference Result 98 states and 140 transitions. [2023-12-21 10:55:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 10:55:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-12-21 10:55:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:19,582 INFO L225 Difference]: With dead ends: 98 [2023-12-21 10:55:19,582 INFO L226 Difference]: Without dead ends: 48 [2023-12-21 10:55:19,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 10:55:19,586 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:19,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:55:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-21 10:55:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-12-21 10:55:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 33 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-21 10:55:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-12-21 10:55:19,612 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 23 [2023-12-21 10:55:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:19,612 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-12-21 10:55:19,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-21 10:55:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-12-21 10:55:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 10:55:19,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:19,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:55:19,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:19,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-21 10:55:19,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:19,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1864870065, now seen corresponding path program 1 times [2023-12-21 10:55:19,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:19,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527492413] [2023-12-21 10:55:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:19,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:19,847 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:19,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075235035] [2023-12-21 10:55:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:19,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:19,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:19,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 10:55:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:19,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 10:55:20,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:20,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:55:20,114 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:55:20,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:55:20,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:20,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527492413] [2023-12-21 10:55:20,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:20,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075235035] [2023-12-21 10:55:20,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075235035] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:55:20,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:55:20,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-21 10:55:20,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040530069] [2023-12-21 10:55:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:55:20,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 10:55:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 10:55:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-21 10:55:20,201 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 10:55:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:20,546 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-12-21 10:55:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 10:55:20,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2023-12-21 10:55:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:20,550 INFO L225 Difference]: With dead ends: 58 [2023-12-21 10:55:20,551 INFO L226 Difference]: Without dead ends: 50 [2023-12-21 10:55:20,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:55:20,553 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:20,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 52 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 10:55:20,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-21 10:55:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-21 10:55:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-21 10:55:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-12-21 10:55:20,570 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 24 [2023-12-21 10:55:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:20,570 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-12-21 10:55:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 10:55:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-12-21 10:55:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 10:55:20,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:20,572 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-21 10:55:20,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:20,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-21 10:55:20,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:20,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -176414272, now seen corresponding path program 1 times [2023-12-21 10:55:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599560389] [2023-12-21 10:55:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:20,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:20,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688762936] [2023-12-21 10:55:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:20,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:20,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:20,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:20,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 10:55:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:21,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 221 conjunts are in the unsatisfiable core [2023-12-21 10:55:21,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:21,037 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:21,051 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:21,192 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:21,198 INFO L378 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 [2023-12-21 10:55:21,203 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:21,239 INFO L378 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 [2023-12-21 10:55:21,460 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:21,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:55:21,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:55:21,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:55:21,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2023-12-21 10:55:21,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2023-12-21 10:55:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:55:21,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:55:21,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:21,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599560389] [2023-12-21 10:55:21,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:21,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688762936] [2023-12-21 10:55:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688762936] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:55:21,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:55:21,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-21 10:55:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219554629] [2023-12-21 10:55:21,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:55:21,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 10:55:21,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 10:55:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-12-21 10:55:21,960 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:55:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:22,866 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2023-12-21 10:55:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 10:55:22,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-21 10:55:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:22,867 INFO L225 Difference]: With dead ends: 88 [2023-12-21 10:55:22,867 INFO L226 Difference]: Without dead ends: 84 [2023-12-21 10:55:22,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2023-12-21 10:55:22,868 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:22,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 381 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 10:55:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-21 10:55:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2023-12-21 10:55:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 55 states have internal predecessors, (55), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-12-21 10:55:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2023-12-21 10:55:22,878 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 28 [2023-12-21 10:55:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:22,878 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2023-12-21 10:55:22,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:55:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2023-12-21 10:55:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 10:55:22,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:22,879 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] [2023-12-21 10:55:22,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:23,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:23,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash -466915291, now seen corresponding path program 1 times [2023-12-21 10:55:23,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:23,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773537395] [2023-12-21 10:55:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:23,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:23,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:23,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10209494] [2023-12-21 10:55:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:23,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:23,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:23,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:23,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 10:55:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:23,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 212 conjunts are in the unsatisfiable core [2023-12-21 10:55:23,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:23,305 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:23,309 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:23,390 INFO L378 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 [2023-12-21 10:55:23,398 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:23,401 INFO L378 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 [2023-12-21 10:55:23,406 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:23,631 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:23,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 10:55:23,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:55:24,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-21 10:55:24,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-21 10:55:24,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2023-12-21 10:55:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:55:24,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:55:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:55:25,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:25,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773537395] [2023-12-21 10:55:25,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:25,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10209494] [2023-12-21 10:55:25,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10209494] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 10:55:25,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:55:25,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [22] total 36 [2023-12-21 10:55:25,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935672304] [2023-12-21 10:55:25,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:55:25,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 10:55:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 10:55:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 10:55:25,026 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 16 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-21 10:55:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:26,740 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2023-12-21 10:55:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 10:55:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-12-21 10:55:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:26,742 INFO L225 Difference]: With dead ends: 114 [2023-12-21 10:55:26,742 INFO L226 Difference]: Without dead ends: 112 [2023-12-21 10:55:26,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 10:55:26,744 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:26,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 406 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 10:55:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-21 10:55:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2023-12-21 10:55:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.123076923076923) internal successors, (73), 73 states have internal predecessors, (73), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2023-12-21 10:55:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2023-12-21 10:55:26,760 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 34 [2023-12-21 10:55:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:26,760 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2023-12-21 10:55:26,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-21 10:55:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2023-12-21 10:55:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 10:55:26,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:26,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2023-12-21 10:55:26,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:26,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:26,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash 212011526, now seen corresponding path program 1 times [2023-12-21 10:55:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:26,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583693718] [2023-12-21 10:55:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:26,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:26,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:26,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355179853] [2023-12-21 10:55:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:27,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:27,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 10:55:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:27,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-21 10:55:27,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:27,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:55:27,210 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:27,249 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:27,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 10:55:27,281 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:27,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:55:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:55:27,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:55:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:55:27,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:27,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583693718] [2023-12-21 10:55:27,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:27,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355179853] [2023-12-21 10:55:27,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355179853] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:55:27,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:55:27,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2023-12-21 10:55:27,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844215670] [2023-12-21 10:55:27,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:55:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-21 10:55:27,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-21 10:55:27,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2023-12-21 10:55:27,893 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand has 32 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 28 states have internal predecessors, (47), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 10:55:31,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:55:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:32,909 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2023-12-21 10:55:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 10:55:32,910 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 28 states have internal predecessors, (47), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) Word has length 37 [2023-12-21 10:55:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:32,911 INFO L225 Difference]: With dead ends: 128 [2023-12-21 10:55:32,911 INFO L226 Difference]: Without dead ends: 120 [2023-12-21 10:55:32,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 10:55:32,912 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 137 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:32,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 74 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 985 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2023-12-21 10:55:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-21 10:55:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2023-12-21 10:55:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 80 states have internal predecessors, (80), 29 states have call successors, (29), 13 states have call predecessors, (29), 16 states have return successors, (35), 28 states have call predecessors, (35), 28 states have call successors, (35) [2023-12-21 10:55:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2023-12-21 10:55:32,928 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 37 [2023-12-21 10:55:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:32,928 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2023-12-21 10:55:32,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 28 states have internal predecessors, (47), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 10:55:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2023-12-21 10:55:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-21 10:55:32,929 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:32,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:55:32,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:33,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:33,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:33,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash 451765875, now seen corresponding path program 1 times [2023-12-21 10:55:33,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:33,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902741842] [2023-12-21 10:55:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:33,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:33,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:33,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136285915] [2023-12-21 10:55:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:33,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:33,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:33,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:33,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 10:55:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:33,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 239 conjunts are in the unsatisfiable core [2023-12-21 10:55:33,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:33,392 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:33,395 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:33,502 INFO L378 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 [2023-12-21 10:55:33,508 INFO L378 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 [2023-12-21 10:55:33,512 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:33,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 10:55:33,524 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:33,662 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:33,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:55:33,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:55:33,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 10:55:33,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 10:55:33,878 INFO L378 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 [2023-12-21 10:55:33,882 INFO L378 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 [2023-12-21 10:55:34,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:55:34,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2023-12-21 10:55:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:55:34,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:55:34,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902741842] [2023-12-21 10:55:34,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136285915] [2023-12-21 10:55:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136285915] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:55:34,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:55:34,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 10:55:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495856201] [2023-12-21 10:55:34,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:55:34,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 10:55:34,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 10:55:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2023-12-21 10:55:34,773 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 10:55:38,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:55:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:40,746 INFO L93 Difference]: Finished difference Result 174 states and 211 transitions. [2023-12-21 10:55:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 10:55:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2023-12-21 10:55:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:40,749 INFO L225 Difference]: With dead ends: 174 [2023-12-21 10:55:40,749 INFO L226 Difference]: Without dead ends: 170 [2023-12-21 10:55:40,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=209, Invalid=2547, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 10:55:40,750 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 163 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:40,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 466 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1339 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2023-12-21 10:55:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-21 10:55:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2023-12-21 10:55:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 113 states have internal predecessors, (114), 39 states have call successors, (39), 19 states have call predecessors, (39), 24 states have return successors, (51), 38 states have call predecessors, (51), 38 states have call successors, (51) [2023-12-21 10:55:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 204 transitions. [2023-12-21 10:55:40,771 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 204 transitions. Word has length 39 [2023-12-21 10:55:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:40,771 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 204 transitions. [2023-12-21 10:55:40,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 10:55:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 204 transitions. [2023-12-21 10:55:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 10:55:40,772 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:40,772 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2023-12-21 10:55:40,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:40,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:40,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:40,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash -603691064, now seen corresponding path program 1 times [2023-12-21 10:55:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:40,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202413841] [2023-12-21 10:55:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:40,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:41,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:41,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441374355] [2023-12-21 10:55:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:41,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:41,003 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:41,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 10:55:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:41,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-21 10:55:41,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:41,191 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:41,214 INFO L378 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 [2023-12-21 10:55:41,217 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:41,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:55:41,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2023-12-21 10:55:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 10:55:41,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:55:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 10:55:41,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202413841] [2023-12-21 10:55:41,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441374355] [2023-12-21 10:55:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441374355] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 10:55:41,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:55:41,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-12-21 10:55:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613028198] [2023-12-21 10:55:41,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:55:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 10:55:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 10:55:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2023-12-21 10:55:41,746 INFO L87 Difference]: Start difference. First operand 166 states and 204 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 10:55:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:42,020 INFO L93 Difference]: Finished difference Result 218 states and 267 transitions. [2023-12-21 10:55:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 10:55:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-12-21 10:55:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:42,022 INFO L225 Difference]: With dead ends: 218 [2023-12-21 10:55:42,022 INFO L226 Difference]: Without dead ends: 216 [2023-12-21 10:55:42,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-12-21 10:55:42,023 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:42,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 344 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:55:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-21 10:55:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2023-12-21 10:55:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 132 states have (on average 1.121212121212121) internal successors, (148), 147 states have internal predecessors, (148), 51 states have call successors, (51), 25 states have call predecessors, (51), 30 states have return successors, (63), 48 states have call predecessors, (63), 50 states have call successors, (63) [2023-12-21 10:55:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2023-12-21 10:55:42,062 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 40 [2023-12-21 10:55:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:42,063 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2023-12-21 10:55:42,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 10:55:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2023-12-21 10:55:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 10:55:42,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:42,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:55:42,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:42,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:42,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:42,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1785388392, now seen corresponding path program 1 times [2023-12-21 10:55:42,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:42,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739963755] [2023-12-21 10:55:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:42,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:42,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597033701] [2023-12-21 10:55:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:42,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:42,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:42,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:42,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 10:55:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:42,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 298 conjunts are in the unsatisfiable core [2023-12-21 10:55:42,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:42,566 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:42,570 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:42,679 INFO L378 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 [2023-12-21 10:55:42,699 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:42,705 INFO L378 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 [2023-12-21 10:55:42,713 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:42,722 INFO L378 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 [2023-12-21 10:55:42,989 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:42,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 10:55:43,016 INFO L378 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 [2023-12-21 10:55:43,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:55:43,481 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2023-12-21 10:55:43,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 54 [2023-12-21 10:55:43,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-12-21 10:55:43,535 INFO L378 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 [2023-12-21 10:55:43,555 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-21 10:55:43,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2023-12-21 10:55:44,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:55:44,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 90 treesize of output 70 [2023-12-21 10:55:44,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:55:44,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 91 treesize of output 67 [2023-12-21 10:55:44,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:55:44,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 53 [2023-12-21 10:55:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:55:45,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:55:45,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:45,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739963755] [2023-12-21 10:55:45,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:45,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597033701] [2023-12-21 10:55:45,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597033701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:55:45,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:55:45,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-21 10:55:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519073731] [2023-12-21 10:55:45,199 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:55:45,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 10:55:45,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 10:55:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:55:45,200 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 26 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 10:55:49,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:55:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:52,934 INFO L93 Difference]: Finished difference Result 288 states and 346 transitions. [2023-12-21 10:55:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-21 10:55:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2023-12-21 10:55:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:52,936 INFO L225 Difference]: With dead ends: 288 [2023-12-21 10:55:52,936 INFO L226 Difference]: Without dead ends: 284 [2023-12-21 10:55:52,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2023-12-21 10:55:52,937 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 148 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:52,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 435 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1379 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2023-12-21 10:55:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-12-21 10:55:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 278. [2023-12-21 10:55:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 173 states have (on average 1.1213872832369942) internal successors, (194), 192 states have internal predecessors, (194), 65 states have call successors, (65), 34 states have call predecessors, (65), 39 states have return successors, (79), 60 states have call predecessors, (79), 64 states have call successors, (79) [2023-12-21 10:55:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 338 transitions. [2023-12-21 10:55:52,970 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 338 transitions. Word has length 45 [2023-12-21 10:55:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:52,970 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 338 transitions. [2023-12-21 10:55:52,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 10:55:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 338 transitions. [2023-12-21 10:55:52,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 10:55:52,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:52,971 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2023-12-21 10:55:52,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:53,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-21 10:55:53,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:53,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:53,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1730585129, now seen corresponding path program 1 times [2023-12-21 10:55:53,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:53,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515257435] [2023-12-21 10:55:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:53,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:53,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417051508] [2023-12-21 10:55:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:53,201 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:53,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 10:55:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:55:53,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-21 10:55:53,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:53,395 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:53,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 10:55:53,430 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:53,487 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:53,491 INFO L378 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 [2023-12-21 10:55:53,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:55:53,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-12-21 10:55:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 10:55:53,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:55:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 10:55:54,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:54,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515257435] [2023-12-21 10:55:54,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:54,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417051508] [2023-12-21 10:55:54,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417051508] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 10:55:54,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:55:54,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [21] total 27 [2023-12-21 10:55:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289845590] [2023-12-21 10:55:54,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:55:54,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 10:55:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 10:55:54,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2023-12-21 10:55:54,111 INFO L87 Difference]: Start difference. First operand 278 states and 338 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 10:55:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:55:54,315 INFO L93 Difference]: Finished difference Result 325 states and 400 transitions. [2023-12-21 10:55:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 10:55:54,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2023-12-21 10:55:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:55:54,318 INFO L225 Difference]: With dead ends: 325 [2023-12-21 10:55:54,318 INFO L226 Difference]: Without dead ends: 323 [2023-12-21 10:55:54,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:55:54,321 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:55:54,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 277 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:55:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-12-21 10:55:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 286. [2023-12-21 10:55:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 179 states have (on average 1.111731843575419) internal successors, (199), 198 states have internal predecessors, (199), 65 states have call successors, (65), 36 states have call predecessors, (65), 41 states have return successors, (79), 60 states have call predecessors, (79), 64 states have call successors, (79) [2023-12-21 10:55:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 343 transitions. [2023-12-21 10:55:54,359 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 343 transitions. Word has length 46 [2023-12-21 10:55:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:55:54,359 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 343 transitions. [2023-12-21 10:55:54,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 10:55:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 343 transitions. [2023-12-21 10:55:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-21 10:55:54,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:55:54,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:55:54,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 10:55:54,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:54,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:55:54,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:55:54,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1711293408, now seen corresponding path program 2 times [2023-12-21 10:55:54,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:55:54,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776605135] [2023-12-21 10:55:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:55:54,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:55:54,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:55:54,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782080587] [2023-12-21 10:55:54,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:55:54,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:55:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:55:54,600 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:55:54,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 10:55:54,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:55:54,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:55:54,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-21 10:55:54,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:55:54,889 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:54,900 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:54,988 INFO L378 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 15 treesize of output 11 [2023-12-21 10:55:54,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2023-12-21 10:55:54,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-21 10:55:55,037 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:55,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:55:55,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-12-21 10:55:55,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2023-12-21 10:55:55,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-21 10:55:55,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-21 10:55:55,184 INFO L378 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 15 treesize of output 1 [2023-12-21 10:55:55,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-21 10:55:55,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 10:55:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:55:55,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:55:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:55:55,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:55,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776605135] [2023-12-21 10:55:55,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:55,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782080587] [2023-12-21 10:55:55,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782080587] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:55:55,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:55:55,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 31 [2023-12-21 10:55:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789285147] [2023-12-21 10:55:55,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:55:55,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 10:55:55,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 10:55:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2023-12-21 10:55:55,599 INFO L87 Difference]: Start difference. First operand 286 states and 343 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 24 states have internal predecessors, (57), 12 states have call successors, (18), 12 states have call predecessors, (18), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 10:55:59,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:56:04,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:56:08,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:56:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:09,245 INFO L93 Difference]: Finished difference Result 477 states and 590 transitions. [2023-12-21 10:56:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 10:56:09,246 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 24 states have internal predecessors, (57), 12 states have call successors, (18), 12 states have call predecessors, (18), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2023-12-21 10:56:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:09,248 INFO L225 Difference]: With dead ends: 477 [2023-12-21 10:56:09,248 INFO L226 Difference]: Without dead ends: 397 [2023-12-21 10:56:09,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 10:56:09,249 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:09,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 242 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1495 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2023-12-21 10:56:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-12-21 10:56:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 376. [2023-12-21 10:56:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 237 states have (on average 1.1012658227848102) internal successors, (261), 259 states have internal predecessors, (261), 81 states have call successors, (81), 49 states have call predecessors, (81), 57 states have return successors, (111), 77 states have call predecessors, (111), 80 states have call successors, (111) [2023-12-21 10:56:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 453 transitions. [2023-12-21 10:56:09,298 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 453 transitions. Word has length 50 [2023-12-21 10:56:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:09,299 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 453 transitions. [2023-12-21 10:56:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 24 states have internal predecessors, (57), 12 states have call successors, (18), 12 states have call predecessors, (18), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 10:56:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 453 transitions. [2023-12-21 10:56:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-21 10:56:09,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:09,299 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:56:09,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 10:56:09,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 10:56:09,509 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:09,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1015102913, now seen corresponding path program 1 times [2023-12-21 10:56:09,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:09,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245529438] [2023-12-21 10:56:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:09,531 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145177703] [2023-12-21 10:56:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:09,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:09,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:56:09,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 10:56:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:09,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-21 10:56:09,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:09,791 INFO L378 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 15 treesize of output 1 [2023-12-21 10:56:09,802 INFO L378 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 15 treesize of output 1 [2023-12-21 10:56:09,832 INFO L378 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 15 treesize of output 1 [2023-12-21 10:56:09,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:56:10,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2023-12-21 10:56:10,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-21 10:56:10,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-21 10:56:10,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 10:56:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 10:56:10,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:56:10,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:10,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245529438] [2023-12-21 10:56:10,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:10,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145177703] [2023-12-21 10:56:10,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145177703] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:56:10,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:56:10,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 10:56:10,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90851333] [2023-12-21 10:56:10,517 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:56:10,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 10:56:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 10:56:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-12-21 10:56:10,518 INFO L87 Difference]: Start difference. First operand 376 states and 453 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-21 10:56:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:11,224 INFO L93 Difference]: Finished difference Result 684 states and 862 transitions. [2023-12-21 10:56:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 10:56:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2023-12-21 10:56:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:11,226 INFO L225 Difference]: With dead ends: 684 [2023-12-21 10:56:11,226 INFO L226 Difference]: Without dead ends: 436 [2023-12-21 10:56:11,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 10:56:11,228 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:11,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 219 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 10:56:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-12-21 10:56:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 426. [2023-12-21 10:56:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 268 states have (on average 1.0895522388059702) internal successors, (292), 290 states have internal predecessors, (292), 86 states have call successors, (86), 53 states have call predecessors, (86), 71 states have return successors, (136), 82 states have call predecessors, (136), 85 states have call successors, (136) [2023-12-21 10:56:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 514 transitions. [2023-12-21 10:56:11,302 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 514 transitions. Word has length 63 [2023-12-21 10:56:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:11,303 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 514 transitions. [2023-12-21 10:56:11,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-21 10:56:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 514 transitions. [2023-12-21 10:56:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-21 10:56:11,304 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:11,304 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:56:11,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 10:56:11,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 10:56:11,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:11,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash 861698770, now seen corresponding path program 1 times [2023-12-21 10:56:11,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:11,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240260174] [2023-12-21 10:56:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:11,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:11,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:11,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168684521] [2023-12-21 10:56:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:11,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:11,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:11,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:56:11,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 10:56:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:11,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 257 conjunts are in the unsatisfiable core [2023-12-21 10:56:11,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:11,825 INFO L378 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 15 treesize of output 1 [2023-12-21 10:56:11,914 INFO L378 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 15 treesize of output 11 [2023-12-21 10:56:11,925 INFO L378 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 [2023-12-21 10:56:11,930 INFO L378 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 [2023-12-21 10:56:11,935 INFO L378 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 [2023-12-21 10:56:11,949 INFO L378 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 [2023-12-21 10:56:11,959 INFO L378 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 15 treesize of output 11 [2023-12-21 10:56:11,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:56:12,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:56:12,228 INFO L378 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 15 treesize of output 11 [2023-12-21 10:56:12,245 INFO L378 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 [2023-12-21 10:56:12,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:56:12,525 INFO L378 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 [2023-12-21 10:56:12,549 INFO L378 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 15 treesize of output 11 [2023-12-21 10:56:12,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 10:56:29,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2023-12-21 10:56:33,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:56:33,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 38 [2023-12-21 10:56:37,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:56:37,739 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2023-12-21 10:56:37,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 73 [2023-12-21 10:56:42,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:56:42,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 111 [2023-12-21 10:57:03,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:57:03,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:57:03,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2023-12-21 10:57:03,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-12-21 10:57:03,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-12-21 10:57:03,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 10:57:07,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-12-21 10:57:07,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:57:07,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 47 treesize of output 35 [2023-12-21 10:57:07,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2023-12-21 10:57:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 10:57:07,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:57:13,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:57:13,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240260174] [2023-12-21 10:57:13,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:57:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168684521] [2023-12-21 10:57:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168684521] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:57:13,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:57:13,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2023-12-21 10:57:13,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149363379] [2023-12-21 10:57:13,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:57:13,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 10:57:13,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:57:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 10:57:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1265, Unknown=10, NotChecked=0, Total=1406 [2023-12-21 10:57:13,610 INFO L87 Difference]: Start difference. First operand 426 states and 514 transitions. Second operand has 33 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 25 states have internal predecessors, (42), 9 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-21 10:57:17,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:21,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:25,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:34,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:38,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:42,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:46,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:50,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:55,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:57:59,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:03,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:08,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:12,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:16,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:21,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:29,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:33,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:38,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:42,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:58:51,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:59:01,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:59:05,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:59:10,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:59:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:59:10,207 INFO L93 Difference]: Finished difference Result 452 states and 558 transitions. [2023-12-21 10:59:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-21 10:59:10,213 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 25 states have internal predecessors, (42), 9 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 74 [2023-12-21 10:59:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:59:10,215 INFO L225 Difference]: With dead ends: 452 [2023-12-21 10:59:10,215 INFO L226 Difference]: Without dead ends: 442 [2023-12-21 10:59:10,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=430, Invalid=4246, Unknown=16, NotChecked=0, Total=4692 [2023-12-21 10:59:10,217 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 65 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.6s IncrementalHoareTripleChecker+Time [2023-12-21 10:59:10,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 139 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1499 Invalid, 25 Unknown, 0 Unchecked, 97.6s Time] [2023-12-21 10:59:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-12-21 10:59:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 430. [2023-12-21 10:59:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 270 states have (on average 1.0888888888888888) internal successors, (294), 292 states have internal predecessors, (294), 87 states have call successors, (87), 53 states have call predecessors, (87), 72 states have return successors, (139), 84 states have call predecessors, (139), 86 states have call successors, (139) [2023-12-21 10:59:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 520 transitions. [2023-12-21 10:59:10,281 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 520 transitions. Word has length 74 [2023-12-21 10:59:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:59:10,281 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 520 transitions. [2023-12-21 10:59:10,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 25 states have internal predecessors, (42), 9 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-21 10:59:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 520 transitions. [2023-12-21 10:59:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-21 10:59:10,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:59:10,282 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:59:10,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 10:59:10,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 10:59:10,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:59:10,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:59:10,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1137642888, now seen corresponding path program 1 times [2023-12-21 10:59:10,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:59:10,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5229792] [2023-12-21 10:59:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:59:10,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:59:10,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:59:10,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729808369] [2023-12-21 10:59:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:59:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:59:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:59:10,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:59:10,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 10:59:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:59:10,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 406 conjunts are in the unsatisfiable core [2023-12-21 10:59:10,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:59:10,897 INFO L378 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 15 treesize of output 1 [2023-12-21 10:59:10,903 INFO L378 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 15 treesize of output 1 [2023-12-21 10:59:10,964 INFO L378 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 [2023-12-21 10:59:10,972 INFO L378 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 15 treesize of output 11 [2023-12-21 10:59:10,980 INFO L378 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 [2023-12-21 10:59:10,987 INFO L378 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 15 treesize of output 11 [2023-12-21 10:59:11,146 INFO L378 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 15 treesize of output 11 [2023-12-21 10:59:11,357 INFO L378 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 [2023-12-21 10:59:11,384 INFO L378 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 15 treesize of output 11 [2023-12-21 10:59:11,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:33,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:05:33,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 23 [2023-12-21 11:05:33,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:50,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:05:50,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 23 [2023-12-21 11:06:03,743 INFO L349 Elim1Store]: treesize reduction 8, result has 95.5 percent of original size [2023-12-21 11:06:03,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 259 [2023-12-21 11:06:04,004 INFO L349 Elim1Store]: treesize reduction 8, result has 95.5 percent of original size [2023-12-21 11:06:04,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 243 [2023-12-21 11:06:04,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:04,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 176 [2023-12-21 11:06:05,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:05,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 230 [2023-12-21 11:06:05,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:05,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 115 treesize of output 95 [2023-12-21 11:06:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 81 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 11:06:07,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:10,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:06:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5229792] [2023-12-21 11:06:10,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:06:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729808369] [2023-12-21 11:06:10,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729808369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:06:10,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:06:10,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2023-12-21 11:06:10,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567711488] [2023-12-21 11:06:10,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:06:10,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-21 11:06:10,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:06:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-21 11:06:10,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1655, Unknown=66, NotChecked=0, Total=1892 [2023-12-21 11:06:10,251 INFO L87 Difference]: Start difference. First operand 430 states and 520 transitions. Second operand has 36 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 12 states have call successors, (17), 12 states have call predecessors, (17), 8 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-21 11:06:18,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:06:22,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:06:34,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:06:38,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:06:42,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:06:47,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:06:51,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:07:15,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:07:19,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:07:23,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:07:27,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:07:31,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:07:35,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:07:39,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:11,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:15,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:19,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:23,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:27,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:31,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:35,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:39,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:43,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:48,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:52,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:08:56,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:00,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:04,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:08,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:12,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:16,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:20,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:24,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:28,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] Received shutdown request... [2023-12-21 11:09:55,950 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 11:09:55,950 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 11:09:56,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:09:56,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 11:09:57,150 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-21 11:09:57,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-21 11:09:57,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 496.0s TimeCoverageRelationStatistics Valid=208, Invalid=2057, Unknown=87, NotChecked=0, Total=2352 [2023-12-21 11:09:57,239 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:09:57,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 35 Unknown, 0 Unchecked, 141.3s Time] [2023-12-21 11:09:57,240 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 11:09:57,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-21 11:09:57,240 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-12-21 11:09:57,243 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:09:57,245 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 11:09:57,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:09:57 BoogieIcfgContainer [2023-12-21 11:09:57,247 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 11:09:57,248 INFO L158 Benchmark]: Toolchain (without parser) took 878767.87ms. Allocated memory was 251.7MB in the beginning and 373.3MB in the end (delta: 121.6MB). Free memory was 208.9MB in the beginning and 307.0MB in the end (delta: -98.1MB). Peak memory consumption was 222.2MB. Max. memory is 8.0GB. [2023-12-21 11:09:57,248 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory was 143.7MB in the beginning and 143.5MB in the end (delta: 205.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 11:09:57,248 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.96ms. Allocated memory is still 251.7MB. Free memory was 208.3MB in the beginning and 195.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-21 11:09:57,249 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.62ms. Allocated memory is still 251.7MB. Free memory was 195.2MB in the beginning and 193.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:09:57,249 INFO L158 Benchmark]: Boogie Preprocessor took 38.00ms. Allocated memory is still 251.7MB. Free memory was 193.6MB in the beginning and 190.0MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2023-12-21 11:09:57,249 INFO L158 Benchmark]: RCFGBuilder took 368.68ms. Allocated memory is still 251.7MB. Free memory was 190.0MB in the beginning and 161.1MB in the end (delta: 28.8MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2023-12-21 11:09:57,249 INFO L158 Benchmark]: TraceAbstraction took 878112.77ms. Allocated memory was 251.7MB in the beginning and 373.3MB in the end (delta: 121.6MB). Free memory was 160.6MB in the beginning and 307.0MB in the end (delta: -146.4MB). Peak memory consumption was 174.0MB. Max. memory is 8.0GB. [2023-12-21 11:09:57,252 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory was 143.7MB in the beginning and 143.5MB in the end (delta: 205.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 209.96ms. Allocated memory is still 251.7MB. Free memory was 208.3MB in the beginning and 195.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.62ms. Allocated memory is still 251.7MB. Free memory was 195.2MB in the beginning and 193.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.00ms. Allocated memory is still 251.7MB. Free memory was 193.6MB in the beginning and 190.0MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 368.68ms. Allocated memory is still 251.7MB. Free memory was 190.0MB in the beginning and 161.1MB in the end (delta: 28.8MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * TraceAbstraction took 878112.77ms. Allocated memory was 251.7MB in the beginning and 373.3MB in the end (delta: 121.6MB). Free memory was 160.6MB in the beginning and 307.0MB in the end (delta: -146.4MB). Peak memory consumption was 174.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 37). Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 878.1s, OverallIterations: 13, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 380.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 mSolverCounterUnknown, 954 SdHoareTripleChecker+Valid, 270.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 912 mSDsluCounter, 3221 SdHoareTripleChecker+Invalid, 268.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2825 mSDsCounter, 512 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9142 IncrementalHoareTripleChecker+Invalid, 9721 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 512 mSolverCounterUnsat, 396 mSDtfsCounter, 9142 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1003 GetRequests, 501 SyntacticMatches, 24 SemanticMatches, 478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4388 ImplicationChecksByTransitivity, 579.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=430occurred in iteration=12, InterpolantAutomatonStates: 241, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 104 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 491.7s InterpolantComputationTime, 619 NumberOfCodeBlocks, 619 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 785 ConstructedInterpolants, 209 QuantifiedInterpolants, 23110 SizeOfPredicates, 619 NumberOfNonLiveVariables, 8638 ConjunctsInSsa, 2093 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 278/436 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown