./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loops/invert_string-1.c --full-output --witness-type violation_witness --validate ./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/invert_string-1.yml/witness.yml --preprocessor.replace.while.statements.and.if-then-else.statements false --icfgbuilder.size.of.a.code.block SequenceOfStatements --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26998269 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/loops/invert_string-1.c ./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/invert_string-1.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --preprocessor.replace.while.statements.and.if-then-else.statements false --icfgbuilder.size.of.a.code.block SequenceOfStatements --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.yaml-violation-witnesses-2699826-m [2024-08-14 14:30:14,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-08-14 14:30:14,444 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-08-14 14:30:14,448 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-08-14 14:30:14,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-08-14 14:30:14,471 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-08-14 14:30:14,472 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-08-14 14:30:14,472 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-08-14 14:30:14,473 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-08-14 14:30:14,473 INFO L153 SettingsManager]: * Use memory slicer=true [2024-08-14 14:30:14,473 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-08-14 14:30:14,474 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-08-14 14:30:14,474 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-08-14 14:30:14,475 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-08-14 14:30:14,475 INFO L153 SettingsManager]: * Use SBE=true [2024-08-14 14:30:14,475 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-08-14 14:30:14,476 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-08-14 14:30:14,476 INFO L153 SettingsManager]: * sizeof long=4 [2024-08-14 14:30:14,476 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-08-14 14:30:14,476 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-08-14 14:30:14,477 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-08-14 14:30:14,477 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-08-14 14:30:14,478 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-08-14 14:30:14,478 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-08-14 14:30:14,478 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-08-14 14:30:14,478 INFO L153 SettingsManager]: * sizeof long double=12 [2024-08-14 14:30:14,479 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-08-14 14:30:14,479 INFO L153 SettingsManager]: * Use constant arrays=true [2024-08-14 14:30:14,479 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-08-14 14:30:14,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-08-14 14:30:14,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-08-14 14:30:14,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-08-14 14:30:14,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-08-14 14:30:14,481 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-08-14 14:30:14,481 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-08-14 14:30:14,481 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-08-14 14:30:14,481 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-08-14 14:30:14,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-08-14 14:30:14,482 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-08-14 14:30:14,482 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-08-14 14:30:14,482 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-08-14 14:30:14,483 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-08-14 14:30:14,483 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-08-14 14:30:14,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder: Size of a code block -> SequenceOfStatements [2024-08-14 14:30:14,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-08-14 14:30:14,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-08-14 14:30:14,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-08-14 14:30:14,749 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-08-14 14:30:14,749 INFO L274 PluginConnector]: Witness Parser initialized [2024-08-14 14:30:14,751 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/invert_string-1.yml/witness.yml [2024-08-14 14:30:14,828 INFO L270 PluginConnector]: Initializing CDTParser... [2024-08-14 14:30:14,829 INFO L274 PluginConnector]: CDTParser initialized [2024-08-14 14:30:14,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2024-08-14 14:30:16,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-08-14 14:30:16,451 INFO L384 CDTParser]: Found 1 translation units. [2024-08-14 14:30:16,452 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2024-08-14 14:30:16,461 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2849e9d0/c021a938ab8b4f7f9a93a40a994becbc/FLAGba92b9ad0 [2024-08-14 14:30:16,475 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2849e9d0/c021a938ab8b4f7f9a93a40a994becbc [2024-08-14 14:30:16,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-08-14 14:30:16,477 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2024-08-14 14:30:16,479 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-08-14 14:30:16,480 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-08-14 14:30:16,484 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-08-14 14:30:16,485 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:30:14" (1/2) ... [2024-08-14 14:30:16,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2630de17 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator VIOLATION_WITNESS 14.08 02:30:16, skipping insertion in model container [2024-08-14 14:30:16,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:30:14" (1/2) ... [2024-08-14 14:30:16,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f1c9dbf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator VIOLATION_WITNESS 14.08 02:30:16, skipping insertion in model container [2024-08-14 14:30:16,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.08 02:30:16" (2/2) ... [2024-08-14 14:30:16,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2630de17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16, skipping insertion in model container [2024-08-14 14:30:16,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.08 02:30:16" (2/2) ... [2024-08-14 14:30:16,504 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-08-14 14:30:16,646 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2024-08-14 14:30:16,677 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-08-14 14:30:16,692 INFO L200 MainTranslator]: Completed pre-run [2024-08-14 14:30:16,703 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2024-08-14 14:30:16,709 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-08-14 14:30:16,723 INFO L204 MainTranslator]: Completed translation [2024-08-14 14:30:16,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16 WrapperNode [2024-08-14 14:30:16,724 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-08-14 14:30:16,725 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-08-14 14:30:16,725 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-08-14 14:30:16,725 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-08-14 14:30:16,736 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,742 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,761 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 4, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-08-14 14:30:16,761 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,762 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-08-14 14:30:16,773 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-08-14 14:30:16,775 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-08-14 14:30:16,775 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-08-14 14:30:16,775 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (1/1) ... [2024-08-14 14:30:16,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-08-14 14:30:16,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:30:16,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-08-14 14:30:16,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-08-14 14:30:16,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-08-14 14:30:16,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-08-14 14:30:16,859 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2024-08-14 14:30:16,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-08-14 14:30:16,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-08-14 14:30:16,860 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2024-08-14 14:30:16,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2024-08-14 14:30:16,860 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2024-08-14 14:30:16,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-08-14 14:30:16,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-08-14 14:30:16,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2024-08-14 14:30:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2024-08-14 14:30:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-08-14 14:30:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-08-14 14:30:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-08-14 14:30:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-08-14 14:30:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-08-14 14:30:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-08-14 14:30:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-08-14 14:30:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-08-14 14:30:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-08-14 14:30:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-08-14 14:30:16,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-08-14 14:30:16,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-08-14 14:30:16,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-08-14 14:30:16,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-08-14 14:30:16,952 INFO L273 CfgBuilder]: Building ICFG [2024-08-14 14:30:16,955 INFO L304 CfgBuilder]: Building CFG for each procedure with an implementation [2024-08-14 14:30:17,189 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-08-14 14:30:17,190 INFO L327 CfgBuilder]: Performing block encoding [2024-08-14 14:30:17,201 INFO L349 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-08-14 14:30:17,202 INFO L354 CfgBuilder]: Removed 0 assume(true) statements. [2024-08-14 14:30:17,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.08 02:30:17 BoogieIcfgContainer [2024-08-14 14:30:17,203 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-08-14 14:30:17,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-08-14 14:30:17,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-08-14 14:30:17,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-08-14 14:30:17,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:30:14" (1/4) ... [2024-08-14 14:30:17,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559e506c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction VIOLATION_WITNESS 14.08 02:30:17, skipping insertion in model container [2024-08-14 14:30:17,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.08 02:30:16" (2/4) ... [2024-08-14 14:30:17,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559e506c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.08 02:30:17, skipping insertion in model container [2024-08-14 14:30:17,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:30:16" (3/4) ... [2024-08-14 14:30:17,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559e506c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.08 02:30:17, skipping insertion in model container [2024-08-14 14:30:17,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.08 02:30:17" (4/4) ... [2024-08-14 14:30:17,227 INFO L119 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2024-08-14 14:30:17,227 WARN L130 eAbstractionObserver]: Found a witness in the YAML format. I will only consider traces that are accepted by the witness [2024-08-14 14:30:17,247 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-08-14 14:30:17,247 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-08-14 14:30:17,283 INFO L92 WitnessUtils]: Constructing product of automaton with 36 states and violation witness of the following lengths: [15] [2024-08-14 14:30:17,287 INFO L82 GeneralOperation]: Start removeDeadEnds. Operand has 36 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-08-14 14:30:17,357 INFO L88 GeneralOperation]: Finished removeDeadEnds. Reduced from 221 states to 70 states. [2024-08-14 14:30:17,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-08-14 14:30:17,382 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=false, 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;@506eab57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-08-14 14:30:17,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-08-14 14:30:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2024-08-14 14:30:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-08-14 14:30:17,389 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:30:17,390 INFO L195 NwaCegarLoop]: trace histogram [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] [2024-08-14 14:30:17,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:30:17,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:30:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1196962138, now seen corresponding path program 1 times [2024-08-14 14:30:17,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:30:17,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223707261] [2024-08-14 14:30:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:30:17,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:30:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:17,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-08-14 14:30:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:17,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-08-14 14:30:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-08-14 14:30:17,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-08-14 14:30:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223707261] [2024-08-14 14:30:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223707261] provided 1 perfect and 0 imperfect interpolant sequences [2024-08-14 14:30:17,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-08-14 14:30:17,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-08-14 14:30:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813024863] [2024-08-14 14:30:17,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-08-14 14:30:17,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-08-14 14:30:17,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-08-14 14:30:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-08-14 14:30:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-08-14 14:30:17,679 INFO L87 Difference]: Start difference. First operand 70 states. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-08-14 14:30:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-08-14 14:30:17,686 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2024-08-14 14:30:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-08-14 14:30:17,688 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2024-08-14 14:30:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-08-14 14:30:17,689 INFO L225 Difference]: With dead ends: 49 [2024-08-14 14:30:17,690 INFO L226 Difference]: Without dead ends: 48 [2024-08-14 14:30:17,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-08-14 14:30:17,694 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-08-14 14:30:17,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-08-14 14:30:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-08-14 14:30:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2024-08-14 14:30:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-08-14 14:30:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-08-14 14:30:17,733 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2024-08-14 14:30:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-08-14 14:30:17,734 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-08-14 14:30:17,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-08-14 14:30:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-08-14 14:30:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-08-14 14:30:17,736 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:30:17,736 INFO L195 NwaCegarLoop]: trace histogram [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] [2024-08-14 14:30:17,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-08-14 14:30:17,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:30:17,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:30:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1234214715, now seen corresponding path program 1 times [2024-08-14 14:30:17,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:30:17,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063776509] [2024-08-14 14:30:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:30:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:30:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:18,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-08-14 14:30:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:18,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-08-14 14:30:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-08-14 14:30:18,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-08-14 14:30:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063776509] [2024-08-14 14:30:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063776509] provided 0 perfect and 1 imperfect interpolant sequences [2024-08-14 14:30:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004885017] [2024-08-14 14:30:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:30:18,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-08-14 14:30:18,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:30:18,159 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) [2024-08-14 14:30:18,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-08-14 14:30:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:18,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-08-14 14:30:18,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-08-14 14:30:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-08-14 14:30:18,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-08-14 14:30:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-08-14 14:30:18,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004885017] provided 0 perfect and 2 imperfect interpolant sequences [2024-08-14 14:30:18,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-08-14 14:30:18,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-08-14 14:30:18,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802995602] [2024-08-14 14:30:18,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-08-14 14:30:18,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-08-14 14:30:18,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-08-14 14:30:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-08-14 14:30:18,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-08-14 14:30:18,558 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-08-14 14:30:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-08-14 14:30:18,753 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-08-14 14:30:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-08-14 14:30:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2024-08-14 14:30:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-08-14 14:30:18,757 INFO L225 Difference]: With dead ends: 74 [2024-08-14 14:30:18,757 INFO L226 Difference]: Without dead ends: 58 [2024-08-14 14:30:18,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-08-14 14:30:18,758 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-08-14 14:30:18,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 98 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-08-14 14:30:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-08-14 14:30:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2024-08-14 14:30:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-08-14 14:30:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2024-08-14 14:30:18,771 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2024-08-14 14:30:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-08-14 14:30:18,771 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2024-08-14 14:30:18,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-08-14 14:30:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2024-08-14 14:30:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-08-14 14:30:18,773 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:30:18,773 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-08-14 14:30:18,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-08-14 14:30:18,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-08-14 14:30:18,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:30:18,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:30:18,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1820237118, now seen corresponding path program 2 times [2024-08-14 14:30:18,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:30:18,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612171452] [2024-08-14 14:30:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:30:18,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:30:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:19,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-08-14 14:30:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:19,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-08-14 14:30:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:30:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-08-14 14:30:19,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-08-14 14:30:19,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612171452] [2024-08-14 14:30:19,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612171452] provided 0 perfect and 1 imperfect interpolant sequences [2024-08-14 14:30:19,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146923723] [2024-08-14 14:30:19,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-08-14 14:30:19,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-08-14 14:30:19,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:30:19,102 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) [2024-08-14 14:30:19,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-08-14 14:30:19,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-08-14 14:30:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-08-14 14:30:19,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2024-08-14 14:30:19,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-08-14 14:30:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-08-14 14:30:19,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-08-14 14:30:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-08-14 14:30:19,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146923723] provided 0 perfect and 2 imperfect interpolant sequences [2024-08-14 14:30:19,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-08-14 14:30:19,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-08-14 14:30:19,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870784953] [2024-08-14 14:30:19,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-08-14 14:30:19,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-08-14 14:30:19,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-08-14 14:30:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-08-14 14:30:19,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-08-14 14:30:19,435 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-08-14 14:30:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-08-14 14:30:19,621 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2024-08-14 14:30:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-08-14 14:30:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2024-08-14 14:30:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-08-14 14:30:19,622 INFO L225 Difference]: With dead ends: 54 [2024-08-14 14:30:19,622 INFO L226 Difference]: Without dead ends: 54 [2024-08-14 14:30:19,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-08-14 14:30:19,624 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-08-14 14:30:19,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 166 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-08-14 14:30:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-08-14 14:30:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-08-14 14:30:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-08-14 14:30:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2024-08-14 14:30:19,630 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2024-08-14 14:30:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-08-14 14:30:19,630 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2024-08-14 14:30:19,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-08-14 14:30:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2024-08-14 14:30:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-08-14 14:30:19,632 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:30:19,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-08-14 14:30:19,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-08-14 14:30:19,839 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,SelfDestructingSolverStorable2 [2024-08-14 14:30:19,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:30:19,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:30:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash -94216869, now seen corresponding path program 3 times [2024-08-14 14:30:19,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:30:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586228897] [2024-08-14 14:30:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:30:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:30:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-08-14 14:30:19,875 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-08-14 14:30:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-08-14 14:30:19,931 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-08-14 14:30:19,932 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-08-14 14:30:19,933 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-08-14 14:30:19,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-08-14 14:30:19,940 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-08-14 14:30:19,943 INFO L196 ceAbstractionStarter]: Computing trace abstraction results [2024-08-14 14:30:19,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.08 02:30:19 BoogieIcfgContainer [2024-08-14 14:30:19,980 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-08-14 14:30:19,981 INFO L158 Benchmark]: Toolchain (without parser) took 3503.49ms. Allocated memory was 146.8MB in the beginning and 190.8MB in the end (delta: 44.0MB). Free memory was 90.1MB in the beginning and 79.5MB in the end (delta: 10.5MB). Peak memory consumption was 55.0MB. Max. memory is 16.1GB. [2024-08-14 14:30:19,982 INFO L158 Benchmark]: Witness Parser took 0.23ms. Allocated memory is still 146.8MB. Free memory is still 82.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-08-14 14:30:19,982 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 146.8MB. Free memory is still 79.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-08-14 14:30:19,983 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.32ms. Allocated memory is still 146.8MB. Free memory was 90.1MB in the beginning and 78.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-08-14 14:30:19,984 INFO L158 Benchmark]: Boogie Preprocessor took 47.27ms. Allocated memory is still 146.8MB. Free memory was 78.3MB in the beginning and 75.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-08-14 14:30:19,984 INFO L158 Benchmark]: IcfgBuilder took 430.39ms. Allocated memory was 146.8MB in the beginning and 190.8MB in the end (delta: 44.0MB). Free memory was 75.9MB in the beginning and 160.1MB in the end (delta: -84.3MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. [2024-08-14 14:30:19,984 INFO L158 Benchmark]: TraceAbstraction took 2760.70ms. Allocated memory is still 190.8MB. Free memory was 160.3MB in the beginning and 79.5MB in the end (delta: 80.8MB). Peak memory consumption was 78.7MB. Max. memory is 16.1GB. [2024-08-14 14:30:19,986 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.23ms. Allocated memory is still 146.8MB. Free memory is still 82.5MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 146.8MB. Free memory is still 79.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.32ms. Allocated memory is still 146.8MB. Free memory was 90.1MB in the beginning and 78.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.27ms. Allocated memory is still 146.8MB. Free memory was 78.3MB in the beginning and 75.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 430.39ms. Allocated memory was 146.8MB in the beginning and 190.8MB in the end (delta: 44.0MB). Free memory was 75.9MB in the beginning and 160.1MB in the end (delta: -84.3MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. * TraceAbstraction took 2760.70ms. Allocated memory is still 190.8MB. Free memory was 160.3MB in the beginning and 79.5MB in the end (delta: 80.8MB). Peak memory consumption was 78.7MB. Max. memory is 16.1GB. * 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 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) VAL [MAX=2] [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 VAL [MAX=2, i=0, str1={5:0}, str2={4:0}] [L22] COND TRUE i= 0 VAL [MAX=2, i=1, j=0, str1={5:0}, str2={4:0}] [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ VAL [MAX=2, i=1, j=1, str1={5:0}, str2={4:0}] [L29] i-- VAL [MAX=2, i=0, j=1, str1={5:0}, str2={4:0}] [L29] COND TRUE i >= 0 VAL [MAX=2, i=0, j=1, str1={5:0}, str2={4:0}] [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ VAL [MAX=2, i=0, j=2, str1={5:0}, str2={4:0}] [L29] i-- VAL [MAX=2, i=-1, j=2, str1={5:0}, str2={4:0}] [L29] COND FALSE !(i >= 0) VAL [MAX=2, j=2, str1={5:0}, str2={4:0}] [L34] j = MAX-1 [L35] i=0 VAL [MAX=2, i=0, j=1, str1={5:0}, str2={4:0}] [L35] COND TRUE i