/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 19:12:05,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 19:12:05,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 19:12:05,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 19:12:05,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 19:12:05,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 19:12:05,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 19:12:05,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 19:12:05,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 19:12:05,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 19:12:05,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 19:12:05,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 19:12:05,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 19:12:05,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 19:12:05,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 19:12:05,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 19:12:05,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 19:12:05,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 19:12:05,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 19:12:05,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 19:12:05,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 19:12:05,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 19:12:05,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 19:12:05,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 19:12:06,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 19:12:06,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 19:12:06,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 19:12:06,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 19:12:06,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 19:12:06,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 19:12:06,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 19:12:06,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 19:12:06,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 19:12:06,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 19:12:06,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 19:12:06,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 19:12:06,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 19:12:06,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 19:12:06,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 19:12:06,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 19:12:06,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 19:12:06,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-12-05 19:12:06,052 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 19:12:06,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 19:12:06,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 19:12:06,054 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 19:12:06,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 19:12:06,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 19:12:06,056 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 19:12:06,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 19:12:06,056 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 19:12:06,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 19:12:06,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 19:12:06,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 19:12:06,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 19:12:06,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 19:12:06,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 19:12:06,058 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 19:12:06,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 19:12:06,058 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 19:12:06,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 19:12:06,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 19:12:06,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 19:12:06,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 19:12:06,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 19:12:06,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:12:06,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 19:12:06,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 19:12:06,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 19:12:06,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 19:12:06,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 19:12:06,060 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-05 19:12:06,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 19:12:06,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 19:12:06,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 19:12:06,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 19:12:06,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 19:12:06,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 19:12:06,407 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 19:12:06,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2022-12-05 19:12:07,620 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 19:12:07,760 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 19:12:07,761 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2022-12-05 19:12:07,766 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d860c022/88ae6b69eaea415a9835dacdcbd4ea22/FLAGb76670c3a [2022-12-05 19:12:07,776 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d860c022/88ae6b69eaea415a9835dacdcbd4ea22 [2022-12-05 19:12:07,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 19:12:07,780 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 19:12:07,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 19:12:07,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 19:12:07,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 19:12:07,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:12:07" (1/1) ... [2022-12-05 19:12:07,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb6b16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:07, skipping insertion in model container [2022-12-05 19:12:07,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:12:07" (1/1) ... [2022-12-05 19:12:07,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 19:12:07,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 19:12:07,928 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:12:07,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:12:07,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:12:07,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:12:07,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:12:07,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:12:07,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:12:07,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:12:07,953 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-05 19:12:07,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:12:07,985 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 19:12:08,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:12:08,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:12:08,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:12:08,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:12:08,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:12:08,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:12:08,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:12:08,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:12:08,021 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-05 19:12:08,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:12:08,038 INFO L208 MainTranslator]: Completed translation [2022-12-05 19:12:08,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08 WrapperNode [2022-12-05 19:12:08,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 19:12:08,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 19:12:08,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 19:12:08,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 19:12:08,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,092 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-12-05 19:12:08,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 19:12:08,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 19:12:08,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 19:12:08,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 19:12:08,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,127 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 19:12:08,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 19:12:08,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 19:12:08,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 19:12:08,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (1/1) ... [2022-12-05 19:12:08,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:12:08,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:12:08,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 19:12:08,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 19:12:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 19:12:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 19:12:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 19:12:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 19:12:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 19:12:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 19:12:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 19:12:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 19:12:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 19:12:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 19:12:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 19:12:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 19:12:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 19:12:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 19:12:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 19:12:08,217 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 19:12:08,346 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 19:12:08,348 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 19:12:08,552 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 19:12:08,656 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 19:12:08,656 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-05 19:12:08,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:12:08 BoogieIcfgContainer [2022-12-05 19:12:08,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 19:12:08,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 19:12:08,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 19:12:08,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 19:12:08,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 07:12:07" (1/3) ... [2022-12-05 19:12:08,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3171690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:12:08, skipping insertion in model container [2022-12-05 19:12:08,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:12:08" (2/3) ... [2022-12-05 19:12:08,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3171690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:12:08, skipping insertion in model container [2022-12-05 19:12:08,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:12:08" (3/3) ... [2022-12-05 19:12:08,665 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-12-05 19:12:08,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 19:12:08,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 19:12:08,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 19:12:08,729 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 19:12:08,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 234 flow [2022-12-05 19:12:08,814 INFO L130 PetriNetUnfolder]: 9/107 cut-off events. [2022-12-05 19:12:08,814 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 19:12:08,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 107 events. 9/107 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2022-12-05 19:12:08,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 109 transitions, 234 flow [2022-12-05 19:12:08,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 99 transitions, 210 flow [2022-12-05 19:12:08,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 19:12:08,839 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600a413e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 19:12:08,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 19:12:08,874 INFO L130 PetriNetUnfolder]: 9/98 cut-off events. [2022-12-05 19:12:08,874 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 19:12:08,874 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:12:08,875 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:12:08,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:12:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:12:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1980256759, now seen corresponding path program 1 times [2022-12-05 19:12:08,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:12:08,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728474555] [2022-12-05 19:12:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:08,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:12:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:12:09,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:12:09,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728474555] [2022-12-05 19:12:09,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728474555] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:12:09,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:12:09,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 19:12:09,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261747956] [2022-12-05 19:12:09,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:12:09,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 19:12:09,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:12:09,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 19:12:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 19:12:09,381 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 109 [2022-12-05 19:12:09,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:09,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:12:09,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 109 [2022-12-05 19:12:09,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:12:09,537 INFO L130 PetriNetUnfolder]: 26/185 cut-off events. [2022-12-05 19:12:09,538 INFO L131 PetriNetUnfolder]: For 36/37 co-relation queries the response was YES. [2022-12-05 19:12:09,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 185 events. 26/185 cut-off events. For 36/37 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 514 event pairs, 3 based on Foata normal form. 23/192 useless extension candidates. Maximal degree in co-relation 140. Up to 41 conditions per place. [2022-12-05 19:12:09,541 INFO L137 encePairwiseOnDemand]: 94/109 looper letters, 24 selfloop transitions, 3 changer transitions 8/104 dead transitions. [2022-12-05 19:12:09,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 104 transitions, 299 flow [2022-12-05 19:12:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:12:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:12:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 591 transitions. [2022-12-05 19:12:09,562 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7745740498034076 [2022-12-05 19:12:09,563 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 210 flow. Second operand 7 states and 591 transitions. [2022-12-05 19:12:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 104 transitions, 299 flow [2022-12-05 19:12:09,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 104 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:12:09,572 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 207 flow [2022-12-05 19:12:09,573 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=207, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2022-12-05 19:12:09,580 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 5 predicate places. [2022-12-05 19:12:09,580 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 207 flow [2022-12-05 19:12:09,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:09,581 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:12:09,581 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:12:09,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 19:12:09,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:12:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:12:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1221264519, now seen corresponding path program 1 times [2022-12-05 19:12:09,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:12:09,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714365921] [2022-12-05 19:12:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:09,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:12:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:12:09,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:12:09,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714365921] [2022-12-05 19:12:09,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714365921] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:12:09,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:12:09,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-05 19:12:09,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056988750] [2022-12-05 19:12:09,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:12:09,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 19:12:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:12:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 19:12:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-05 19:12:09,799 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 109 [2022-12-05 19:12:09,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:09,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:12:09,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 109 [2022-12-05 19:12:09,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:12:10,021 INFO L130 PetriNetUnfolder]: 95/393 cut-off events. [2022-12-05 19:12:10,021 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-05 19:12:10,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 393 events. 95/393 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1774 event pairs, 42 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 641. Up to 136 conditions per place. [2022-12-05 19:12:10,027 INFO L137 encePairwiseOnDemand]: 100/109 looper letters, 37 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2022-12-05 19:12:10,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 110 transitions, 338 flow [2022-12-05 19:12:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 19:12:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 19:12:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 646 transitions. [2022-12-05 19:12:10,030 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7408256880733946 [2022-12-05 19:12:10,030 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 207 flow. Second operand 8 states and 646 transitions. [2022-12-05 19:12:10,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 110 transitions, 338 flow [2022-12-05 19:12:10,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 110 transitions, 331 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-05 19:12:10,035 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 236 flow [2022-12-05 19:12:10,036 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=236, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2022-12-05 19:12:10,036 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 5 predicate places. [2022-12-05 19:12:10,037 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 236 flow [2022-12-05 19:12:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:10,038 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:12:10,038 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:12:10,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 19:12:10,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:12:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:12:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 245399257, now seen corresponding path program 1 times [2022-12-05 19:12:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:12:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750625879] [2022-12-05 19:12:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:12:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:12:10,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:12:10,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750625879] [2022-12-05 19:12:10,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750625879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:12:10,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:12:10,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-05 19:12:10,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766874510] [2022-12-05 19:12:10,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:12:10,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 19:12:10,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:12:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 19:12:10,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-05 19:12:10,249 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 109 [2022-12-05 19:12:10,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:10,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:12:10,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 109 [2022-12-05 19:12:10,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:12:10,382 INFO L130 PetriNetUnfolder]: 81/316 cut-off events. [2022-12-05 19:12:10,383 INFO L131 PetriNetUnfolder]: For 48/51 co-relation queries the response was YES. [2022-12-05 19:12:10,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 316 events. 81/316 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1251 event pairs, 47 based on Foata normal form. 3/294 useless extension candidates. Maximal degree in co-relation 419. Up to 144 conditions per place. [2022-12-05 19:12:10,387 INFO L137 encePairwiseOnDemand]: 100/109 looper letters, 25 selfloop transitions, 6 changer transitions 11/107 dead transitions. [2022-12-05 19:12:10,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 347 flow [2022-12-05 19:12:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 19:12:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 19:12:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 642 transitions. [2022-12-05 19:12:10,391 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7362385321100917 [2022-12-05 19:12:10,391 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 236 flow. Second operand 8 states and 642 transitions. [2022-12-05 19:12:10,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 347 flow [2022-12-05 19:12:10,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 337 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:12:10,396 INFO L231 Difference]: Finished difference. Result has 107 places, 93 transitions, 230 flow [2022-12-05 19:12:10,396 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=107, PETRI_TRANSITIONS=93} [2022-12-05 19:12:10,398 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 10 predicate places. [2022-12-05 19:12:10,398 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 93 transitions, 230 flow [2022-12-05 19:12:10,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:10,399 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:12:10,399 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:12:10,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 19:12:10,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:12:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:12:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1245013601, now seen corresponding path program 1 times [2022-12-05 19:12:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:12:10,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061730171] [2022-12-05 19:12:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:12:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:10,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:12:10,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061730171] [2022-12-05 19:12:10,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061730171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:12:10,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885512769] [2022-12-05 19:12:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:10,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:12:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:12:10,603 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) [2022-12-05 19:12:10,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 19:12:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:10,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 19:12:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:12:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:10,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:12:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:11,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885512769] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 19:12:11,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 19:12:11,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-12-05 19:12:11,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601461169] [2022-12-05 19:12:11,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:12:11,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 19:12:11,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:12:11,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 19:12:11,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-05 19:12:11,069 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 109 [2022-12-05 19:12:11,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 93 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 78.28571428571429) internal successors, (548), 7 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:11,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:12:11,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 109 [2022-12-05 19:12:11,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:12:11,185 INFO L130 PetriNetUnfolder]: 70/250 cut-off events. [2022-12-05 19:12:11,185 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-05 19:12:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 250 events. 70/250 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 842 event pairs, 14 based on Foata normal form. 9/252 useless extension candidates. Maximal degree in co-relation 414. Up to 79 conditions per place. [2022-12-05 19:12:11,189 INFO L137 encePairwiseOnDemand]: 101/109 looper letters, 27 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2022-12-05 19:12:11,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 99 transitions, 315 flow [2022-12-05 19:12:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:12:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:12:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 559 transitions. [2022-12-05 19:12:11,191 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7326343381389253 [2022-12-05 19:12:11,191 INFO L175 Difference]: Start difference. First operand has 107 places, 93 transitions, 230 flow. Second operand 7 states and 559 transitions. [2022-12-05 19:12:11,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 99 transitions, 315 flow [2022-12-05 19:12:11,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 289 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-12-05 19:12:11,196 INFO L231 Difference]: Finished difference. Result has 103 places, 95 transitions, 241 flow [2022-12-05 19:12:11,196 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=103, PETRI_TRANSITIONS=95} [2022-12-05 19:12:11,198 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 6 predicate places. [2022-12-05 19:12:11,199 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 95 transitions, 241 flow [2022-12-05 19:12:11,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.28571428571429) internal successors, (548), 7 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:11,207 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:12:11,207 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:12:11,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 19:12:11,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:12:11,416 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:12:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:12:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1050779783, now seen corresponding path program 1 times [2022-12-05 19:12:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:12:11,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888386760] [2022-12-05 19:12:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:12:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:12:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888386760] [2022-12-05 19:12:11,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888386760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:12:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080204912] [2022-12-05 19:12:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:11,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:12:11,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:12:11,541 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) [2022-12-05 19:12:11,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 19:12:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:11,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 19:12:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:12:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:11,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:12:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:11,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080204912] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 19:12:11,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 19:12:11,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-12-05 19:12:11,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128204849] [2022-12-05 19:12:11,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:12:11,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 19:12:11,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:12:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 19:12:11,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-05 19:12:11,852 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 109 [2022-12-05 19:12:11,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 95 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 78.28571428571429) internal successors, (548), 7 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:11,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:12:11,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 109 [2022-12-05 19:12:11,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:12:11,946 INFO L130 PetriNetUnfolder]: 59/252 cut-off events. [2022-12-05 19:12:11,946 INFO L131 PetriNetUnfolder]: For 76/90 co-relation queries the response was YES. [2022-12-05 19:12:11,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 252 events. 59/252 cut-off events. For 76/90 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 791 event pairs, 20 based on Foata normal form. 14/253 useless extension candidates. Maximal degree in co-relation 416. Up to 67 conditions per place. [2022-12-05 19:12:11,948 INFO L137 encePairwiseOnDemand]: 101/109 looper letters, 29 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2022-12-05 19:12:11,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 101 transitions, 334 flow [2022-12-05 19:12:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:12:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:12:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 559 transitions. [2022-12-05 19:12:11,950 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7326343381389253 [2022-12-05 19:12:11,950 INFO L175 Difference]: Start difference. First operand has 103 places, 95 transitions, 241 flow. Second operand 7 states and 559 transitions. [2022-12-05 19:12:11,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 101 transitions, 334 flow [2022-12-05 19:12:11,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 101 transitions, 325 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:12:11,952 INFO L231 Difference]: Finished difference. Result has 107 places, 96 transitions, 260 flow [2022-12-05 19:12:11,953 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=260, PETRI_PLACES=107, PETRI_TRANSITIONS=96} [2022-12-05 19:12:11,953 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 10 predicate places. [2022-12-05 19:12:11,953 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 96 transitions, 260 flow [2022-12-05 19:12:11,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.28571428571429) internal successors, (548), 7 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:11,954 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:12:11,954 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:12:11,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 19:12:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:12:12,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:12:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:12:12,160 INFO L85 PathProgramCache]: Analyzing trace with hash 635154899, now seen corresponding path program 1 times [2022-12-05 19:12:12,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:12:12,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868465588] [2022-12-05 19:12:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:12,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:12:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:12,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:12:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868465588] [2022-12-05 19:12:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868465588] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:12:12,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853788399] [2022-12-05 19:12:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:12,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:12:12,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:12:12,865 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) [2022-12-05 19:12:12,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 19:12:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:12,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-05 19:12:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:12:13,275 INFO L350 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 [2022-12-05 19:12:13,428 INFO L350 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 6 treesize of output 5 [2022-12-05 19:12:13,526 INFO L350 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 6 treesize of output 5 [2022-12-05 19:12:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:12:13,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:12:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:13,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853788399] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:12:13,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:12:13,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 11] total 35 [2022-12-05 19:12:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023921557] [2022-12-05 19:12:13,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:12:13,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 19:12:13,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:12:13,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 19:12:13,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1071, Unknown=10, NotChecked=0, Total=1190 [2022-12-05 19:12:13,938 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 109 [2022-12-05 19:12:13,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 260 flow. Second operand has 35 states, 35 states have (on average 41.542857142857144) internal successors, (1454), 35 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:13,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:12:13,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 109 [2022-12-05 19:12:13,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:12:16,028 INFO L130 PetriNetUnfolder]: 978/2087 cut-off events. [2022-12-05 19:12:16,029 INFO L131 PetriNetUnfolder]: For 1288/1288 co-relation queries the response was YES. [2022-12-05 19:12:16,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5022 conditions, 2087 events. 978/2087 cut-off events. For 1288/1288 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14133 event pairs, 104 based on Foata normal form. 2/2078 useless extension candidates. Maximal degree in co-relation 4933. Up to 450 conditions per place. [2022-12-05 19:12:16,040 INFO L137 encePairwiseOnDemand]: 85/109 looper letters, 231 selfloop transitions, 81 changer transitions 8/353 dead transitions. [2022-12-05 19:12:16,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 353 transitions, 1741 flow [2022-12-05 19:12:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-05 19:12:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-05 19:12:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2068 transitions. [2022-12-05 19:12:16,046 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.412445153570004 [2022-12-05 19:12:16,046 INFO L175 Difference]: Start difference. First operand has 107 places, 96 transitions, 260 flow. Second operand 46 states and 2068 transitions. [2022-12-05 19:12:16,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 353 transitions, 1741 flow [2022-12-05 19:12:16,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 353 transitions, 1705 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-05 19:12:16,054 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 863 flow [2022-12-05 19:12:16,054 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=863, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2022-12-05 19:12:16,055 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 70 predicate places. [2022-12-05 19:12:16,055 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 863 flow [2022-12-05 19:12:16,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 41.542857142857144) internal successors, (1454), 35 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:16,056 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:12:16,057 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:12:16,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 19:12:16,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:12:16,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:12:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:12:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1883941547, now seen corresponding path program 2 times [2022-12-05 19:12:16,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:12:16,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626165559] [2022-12-05 19:12:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:16,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:12:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:12:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:12:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:12:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626165559] [2022-12-05 19:12:17,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626165559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:12:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734504547] [2022-12-05 19:12:17,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:12:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:12:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:12:17,088 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) [2022-12-05 19:12:17,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 19:12:17,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:12:17,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:12:17,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-05 19:12:17,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:12:17,439 INFO L350 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 [2022-12-05 19:12:17,581 INFO L350 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 6 treesize of output 5 [2022-12-05 19:12:17,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 19:12:17,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-05 19:12:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:12:17,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:12:17,999 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_134 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_134) c_~A~0.base) c_~A~0.offset) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0))) is different from false [2022-12-05 19:12:18,088 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_134 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_133))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_134) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))))) is different from false [2022-12-05 19:12:18,116 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_134 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_133))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_134) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) (+ (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) c_~counter~0)))) is different from false [2022-12-05 19:12:18,125 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_134 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_133))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_134) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))))) is different from false [2022-12-05 19:12:18,138 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_134 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_133))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_134) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2022-12-05 19:12:18,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 19:12:18,170 INFO L350 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2022-12-05 19:12:18,174 INFO L350 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 138 treesize of output 122 [2022-12-05 19:12:18,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 122 treesize of output 114 [2022-12-05 19:12:18,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 114 treesize of output 106 [2022-12-05 19:12:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-05 19:12:18,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734504547] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:12:18,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:12:18,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 46 [2022-12-05 19:12:18,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647669882] [2022-12-05 19:12:18,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:12:18,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-05 19:12:18,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:12:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-05 19:12:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1470, Unknown=45, NotChecked=410, Total=2070 [2022-12-05 19:12:18,409 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 109 [2022-12-05 19:12:18,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 863 flow. Second operand has 46 states, 46 states have (on average 38.02173913043478) internal successors, (1749), 46 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:18,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:12:18,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 109 [2022-12-05 19:12:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:12:21,592 INFO L130 PetriNetUnfolder]: 1534/3224 cut-off events. [2022-12-05 19:12:21,592 INFO L131 PetriNetUnfolder]: For 8379/8384 co-relation queries the response was YES. [2022-12-05 19:12:21,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10279 conditions, 3224 events. 1534/3224 cut-off events. For 8379/8384 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24265 event pairs, 96 based on Foata normal form. 6/3221 useless extension candidates. Maximal degree in co-relation 10213. Up to 500 conditions per place. [2022-12-05 19:12:21,620 INFO L137 encePairwiseOnDemand]: 83/109 looper letters, 251 selfloop transitions, 130 changer transitions 8/419 dead transitions. [2022-12-05 19:12:21,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 419 transitions, 2923 flow [2022-12-05 19:12:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-05 19:12:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-05 19:12:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1973 transitions. [2022-12-05 19:12:21,635 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3851259027913332 [2022-12-05 19:12:21,635 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 863 flow. Second operand 47 states and 1973 transitions. [2022-12-05 19:12:21,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 419 transitions, 2923 flow [2022-12-05 19:12:21,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 419 transitions, 2759 flow, removed 69 selfloop flow, removed 14 redundant places. [2022-12-05 19:12:21,679 INFO L231 Difference]: Finished difference. Result has 213 places, 243 transitions, 1701 flow [2022-12-05 19:12:21,679 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1701, PETRI_PLACES=213, PETRI_TRANSITIONS=243} [2022-12-05 19:12:21,680 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 116 predicate places. [2022-12-05 19:12:21,680 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 243 transitions, 1701 flow [2022-12-05 19:12:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 38.02173913043478) internal successors, (1749), 46 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:12:21,681 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:12:21,681 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:12:21,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 19:12:21,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:12:21,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:12:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:12:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash -158911937, now seen corresponding path program 3 times [2022-12-05 19:12:21,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:12:21,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771236166] [2022-12-05 19:12:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:12:21,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:12:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 19:12:21,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-05 19:12:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 19:12:22,018 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-05 19:12:22,018 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-05 19:12:22,019 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 19:12:22,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 19:12:22,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 19:12:22,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 19:12:22,022 INFO L458 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-12-05 19:12:22,027 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 19:12:22,028 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 19:12:22,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 07:12:22 BasicIcfg [2022-12-05 19:12:22,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 19:12:22,098 INFO L158 Benchmark]: Toolchain (without parser) took 14318.46ms. Allocated memory was 174.1MB in the beginning and 390.1MB in the end (delta: 216.0MB). Free memory was 135.8MB in the beginning and 215.5MB in the end (delta: -79.7MB). Peak memory consumption was 136.8MB. Max. memory is 8.0GB. [2022-12-05 19:12:22,098 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 174.1MB. Free memory is still 150.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 19:12:22,099 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.94ms. Allocated memory is still 174.1MB. Free memory was 135.2MB in the beginning and 123.2MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-05 19:12:22,099 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.00ms. Allocated memory is still 174.1MB. Free memory was 123.2MB in the beginning and 121.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 19:12:22,099 INFO L158 Benchmark]: Boogie Preprocessor took 49.65ms. Allocated memory is still 174.1MB. Free memory was 121.1MB in the beginning and 119.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 19:12:22,099 INFO L158 Benchmark]: RCFGBuilder took 514.91ms. Allocated memory is still 174.1MB. Free memory was 119.5MB in the beginning and 94.4MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2022-12-05 19:12:22,100 INFO L158 Benchmark]: TraceAbstraction took 13437.86ms. Allocated memory was 174.1MB in the beginning and 390.1MB in the end (delta: 216.0MB). Free memory was 93.8MB in the beginning and 215.5MB in the end (delta: -121.7MB). Peak memory consumption was 95.9MB. Max. memory is 8.0GB. [2022-12-05 19:12:22,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 174.1MB. Free memory is still 150.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 258.94ms. Allocated memory is still 174.1MB. Free memory was 135.2MB in the beginning and 123.2MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.00ms. Allocated memory is still 174.1MB. Free memory was 123.2MB in the beginning and 121.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 49.65ms. Allocated memory is still 174.1MB. Free memory was 121.1MB in the beginning and 119.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 514.91ms. Allocated memory is still 174.1MB. Free memory was 119.5MB in the beginning and 94.4MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 13437.86ms. Allocated memory was 174.1MB in the beginning and 390.1MB in the end (delta: 216.0MB). Free memory was 93.8MB in the beginning and 215.5MB in the end (delta: -121.7MB). Peak memory consumption was 95.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; VAL [A={0:0}] [L42] 0 int counter, N; VAL [A={0:0}, counter=0, N=0] [L75] 0 pthread_t t1, t2; VAL [A={0:0}, counter=0, N=0, t1={6:0}, t2={5:0}] [L77] 0 N = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, A={0:0}, counter=0, N=1, t1={6:0}, t2={5:0}] [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, malloc(sizeof(int) * (size_t)size)={3:0}, N=1, size=1] [L97] 0 int i = 0; VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=0, N=1, size=1] [L97] COND TRUE 0 i < size VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=0, N=1, size=1] [L98] 0 arr[i] = __VERIFIER_nondet_int() VAL [\old(size)=1, __VERIFIER_nondet_int()=7, A={0:0}, arr={3:0}, counter=0, i=0, N=1, size=1] [L97] 0 i++ VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=1, N=1, size=1] [L97] COND FALSE 0 !(i < size) VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=1, N=1, size=1] [L100] 0 return arr; VAL [\old(size)=1, \result={3:0}, A={0:0}, arr={3:0}, counter=0, i=1, N=1, size=1] [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) VAL [A={3:0}, counter=0, create_fresh_int_array(N)={3:0}, N=1, t1={6:0}, t2={5:0}] [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, counter=0, N=1, pthread_create(&t1, 0, thread1, 0)=-1, t1={6:0}, t2={5:0}] [L49] 1 int i=0; VAL [A={3:0}, counter=0, i=0, N=1] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={3:0}, counter=0, N=1, pthread_create(&t2, 0, thread2, 0)=0, t1={6:0}, t2={5:0}] [L83] 0 \read(t1) VAL [\read(t1)=-1, A={3:0}, counter=0, N=1, t1={6:0}, t2={5:0}] [L62] 2 int i=0; VAL [A={3:0}, counter=0, i=0, N=1] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L67] 2 counter = tmp VAL [A={3:0}, counter=-7, i=0, N=1, tmp=-7] [L62] 2 i++ VAL [A={3:0}, counter=-7, i=1, N=1, tmp=-7] [L62] COND FALSE 2 !(i