./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:11:46,092 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:11:46,185 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:11:46,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:11:46,190 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:11:46,213 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:11:46,214 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:11:46,214 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:11:46,215 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:11:46,218 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:11:46,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:11:46,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:11:46,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:11:46,220 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:11:46,221 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:11:46,221 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:11:46,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:11:46,221 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:11:46,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:11:46,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:11:46,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:11:46,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:11:46,222 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:11:46,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:11:46,223 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:11:46,223 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:11:46,223 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:11:46,223 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:11:46,224 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:11:46,224 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:11:46,225 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:11:46,225 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:11:46,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:11:46,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:11:46,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:11:46,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:11:46,226 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:11:46,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:11:46,226 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:11:46,227 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:11:46,227 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:11:46,227 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:11:46,227 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:11:46,227 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:11:46,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:11:46,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:11:46,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:11:46,483 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:11:46,485 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:11:46,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml [2024-01-31 16:11:46,596 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:11:46,597 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:11:46,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-01-31 16:11:47,670 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:11:47,830 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:11:47,831 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-01-31 16:11:47,837 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868c5fd85/50e60084b76c4225a9d402aa5174d30b/FLAGa66fa8320 [2024-01-31 16:11:47,851 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868c5fd85/50e60084b76c4225a9d402aa5174d30b [2024-01-31 16:11:47,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:11:47,853 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:11:47,856 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:11:47,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:11:47,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:11:47,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:46" (1/2) ... [2024-01-31 16:11:47,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b4da9bf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:47, skipping insertion in model container [2024-01-31 16:11:47,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:46" (1/2) ... [2024-01-31 16:11:47,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@765dba4e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:47, skipping insertion in model container [2024-01-31 16:11:47,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:11:47" (2/2) ... [2024-01-31 16:11:47,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b4da9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:47, skipping insertion in model container [2024-01-31 16:11:47,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:11:47" (2/2) ... [2024-01-31 16:11:47,864 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:11:47,878 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:11:47,883 INFO L98 nessWitnessExtractor]: Location invariant before [L53-L53] (unsigned long )_argptr == 0UL [2024-01-31 16:11:47,883 INFO L98 nessWitnessExtractor]: Loop invariant at [L49-L49] (unsigned long )_argptr == 0UL [2024-01-31 16:11:47,883 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] ((((((0LL - (long long )x1) + (long long )x2 >= 0LL) && ((long long )x1 + (long long )x2 >= 0LL)) && ((0LL - (long long )x1) - (long long )x2 >= 0LL)) && ((long long )x1 - (long long )x2 >= 0LL)) && (x1 == 0)) && (x2 == 0) [2024-01-31 16:11:47,883 INFO L98 nessWitnessExtractor]: Location invariant before [L60-L60] x2 == 0 [2024-01-31 16:11:47,883 INFO L98 nessWitnessExtractor]: Loop invariant at [L41-L41] (unsigned long )_argptr == 0UL [2024-01-31 16:11:47,884 INFO L98 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-01-31 16:11:47,884 INFO L98 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-01-31 16:11:47,884 INFO L98 nessWitnessExtractor]: Location invariant before [L45-L45] (unsigned long )_argptr == 0UL [2024-01-31 16:11:47,900 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:11:48,020 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1902,1915] [2024-01-31 16:11:48,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:11:48,031 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:11:48,082 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1902,1915] [2024-01-31 16:11:48,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:11:48,093 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:11:48,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48 WrapperNode [2024-01-31 16:11:48,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:11:48,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:11:48,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:11:48,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:11:48,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,118 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2024-01-31 16:11:48,118 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:11:48,119 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:11:48,119 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:11:48,119 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:11:48,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,152 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 16:11:48,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:11:48,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:11:48,182 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:11:48,182 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:11:48,183 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (1/1) ... [2024-01-31 16:11:48,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:11:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:48,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:11:48,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:11:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:11:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:11:48,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:11:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:11:48,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:11:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:11:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:11:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:11:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:11:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:11:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:11:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:11:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:11:48,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:11:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:11:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:11:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:11:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:11:48,278 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:11:48,348 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:11:48,350 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:11:48,491 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:11:48,491 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:11:48,580 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:11:48,581 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:11:48,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:11:48 BoogieIcfgContainer [2024-01-31 16:11:48,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:11:48,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:11:48,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:11:48,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:11:48,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:46" (1/4) ... [2024-01-31 16:11:48,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8c178d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:11:48, skipping insertion in model container [2024-01-31 16:11:48,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:11:47" (2/4) ... [2024-01-31 16:11:48,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8c178d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:11:48, skipping insertion in model container [2024-01-31 16:11:48,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:48" (3/4) ... [2024-01-31 16:11:48,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8c178d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:11:48, skipping insertion in model container [2024-01-31 16:11:48,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:11:48" (4/4) ... [2024-01-31 16:11:48,588 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2024-01-31 16:11:48,601 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:11:48,602 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-01-31 16:11:48,602 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:11:48,636 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:11:48,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 37 transitions, 88 flow [2024-01-31 16:11:48,679 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2024-01-31 16:11:48,679 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:11:48,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 4/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-01-31 16:11:48,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 37 transitions, 88 flow [2024-01-31 16:11:48,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 34 transitions, 80 flow [2024-01-31 16:11:48,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:11:48,702 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@470b5315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:11:48,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-01-31 16:11:48,705 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:11:48,706 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:11:48,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:11:48,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:48,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:11:48,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:48,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash 7930, now seen corresponding path program 1 times [2024-01-31 16:11:48,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:48,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519636900] [2024-01-31 16:11:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:48,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:48,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:48,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519636900] [2024-01-31 16:11:48,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519636900] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:48,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:48,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:48,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246404908] [2024-01-31 16:11:48,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:48,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:49,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:49,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:49,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-01-31 16:11:49,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:49,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:49,104 INFO L124 PetriNetUnfolderBase]: 72/167 cut-off events. [2024-01-31 16:11:49,104 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-01-31 16:11:49,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 167 events. 72/167 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 657 event pairs, 38 based on Foata normal form. 31/170 useless extension candidates. Maximal degree in co-relation 246. Up to 122 conditions per place. [2024-01-31 16:11:49,109 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 16 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-01-31 16:11:49,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 110 flow [2024-01-31 16:11:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-01-31 16:11:49,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-01-31 16:11:49,120 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 80 flow. Second operand 3 states and 66 transitions. [2024-01-31 16:11:49,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 110 flow [2024-01-31 16:11:49,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:11:49,124 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 70 flow [2024-01-31 16:11:49,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-01-31 16:11:49,130 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-01-31 16:11:49,130 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 70 flow [2024-01-31 16:11:49,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-01-31 16:11:49,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-31 16:11:49,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:11:49,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:49,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,135 INFO L85 PathProgramCache]: Analyzing trace with hash 246076, now seen corresponding path program 1 times [2024-01-31 16:11:49,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903141414] [2024-01-31 16:11:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903141414] [2024-01-31 16:11:49,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903141414] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997584083] [2024-01-31 16:11:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:49,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:49,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:49,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2024-01-31 16:11:49,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-01-31 16:11:49,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2024-01-31 16:11:49,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:49,243 INFO L124 PetriNetUnfolderBase]: 57/140 cut-off events. [2024-01-31 16:11:49,243 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:11:49,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 140 events. 57/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 544 event pairs, 27 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 236. Up to 95 conditions per place. [2024-01-31 16:11:49,245 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 14 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-01-31 16:11:49,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 100 flow [2024-01-31 16:11:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-01-31 16:11:49,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2024-01-31 16:11:49,246 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 70 flow. Second operand 3 states and 68 transitions. [2024-01-31 16:11:49,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 100 flow [2024-01-31 16:11:49,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:49,247 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 68 flow [2024-01-31 16:11:49,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-31 16:11:49,248 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2024-01-31 16:11:49,248 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 68 flow [2024-01-31 16:11:49,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-01-31 16:11:49,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:11:49,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:11:49,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:49,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1258812071, now seen corresponding path program 1 times [2024-01-31 16:11:49,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142934184] [2024-01-31 16:11:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142934184] [2024-01-31 16:11:49,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142934184] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:49,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204407875] [2024-01-31 16:11:49,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:49,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:49,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-01-31 16:11:49,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:49,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:49,488 INFO L124 PetriNetUnfolderBase]: 45/126 cut-off events. [2024-01-31 16:11:49,488 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:11:49,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 126 events. 45/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 457 event pairs, 2 based on Foata normal form. 8/115 useless extension candidates. Maximal degree in co-relation 203. Up to 65 conditions per place. [2024-01-31 16:11:49,490 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-01-31 16:11:49,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 115 flow [2024-01-31 16:11:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-01-31 16:11:49,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-01-31 16:11:49,491 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 68 flow. Second operand 4 states and 84 transitions. [2024-01-31 16:11:49,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 115 flow [2024-01-31 16:11:49,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 111 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:49,492 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 62 flow [2024-01-31 16:11:49,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2024-01-31 16:11:49,493 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -6 predicate places. [2024-01-31 16:11:49,493 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 62 flow [2024-01-31 16:11:49,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-01-31 16:11:49,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:49,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:11:49,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:49,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1461571724, now seen corresponding path program 1 times [2024-01-31 16:11:49,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383888572] [2024-01-31 16:11:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383888572] [2024-01-31 16:11:49,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383888572] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:49,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752903251] [2024-01-31 16:11:49,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:49,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:49,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:49,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-01-31 16:11:49,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:49,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:49,620 INFO L124 PetriNetUnfolderBase]: 46/115 cut-off events. [2024-01-31 16:11:49,620 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:11:49,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 115 events. 46/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 392 event pairs, 3 based on Foata normal form. 8/108 useless extension candidates. Maximal degree in co-relation 189. Up to 52 conditions per place. [2024-01-31 16:11:49,621 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-01-31 16:11:49,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 117 flow [2024-01-31 16:11:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-01-31 16:11:49,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581081081081081 [2024-01-31 16:11:49,622 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 62 flow. Second operand 4 states and 86 transitions. [2024-01-31 16:11:49,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 117 flow [2024-01-31 16:11:49,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:49,623 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 57 flow [2024-01-31 16:11:49,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=57, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2024-01-31 16:11:49,624 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -8 predicate places. [2024-01-31 16:11:49,624 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 57 flow [2024-01-31 16:11:49,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-01-31 16:11:49,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:49,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:11:49,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:49,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1941363802, now seen corresponding path program 1 times [2024-01-31 16:11:49,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235346128] [2024-01-31 16:11:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235346128] [2024-01-31 16:11:49,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235346128] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:49,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60262036] [2024-01-31 16:11:49,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:49,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:49,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2024-01-31 16:11:49,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-01-31 16:11:49,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2024-01-31 16:11:49,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:49,733 INFO L124 PetriNetUnfolderBase]: 65/168 cut-off events. [2024-01-31 16:11:49,733 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:11:49,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 168 events. 65/168 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 691 event pairs, 9 based on Foata normal form. 1/142 useless extension candidates. Maximal degree in co-relation 282. Up to 86 conditions per place. [2024-01-31 16:11:49,734 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 19 selfloop transitions, 5 changer transitions 1/34 dead transitions. [2024-01-31 16:11:49,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 132 flow [2024-01-31 16:11:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-01-31 16:11:49,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7477477477477478 [2024-01-31 16:11:49,736 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 57 flow. Second operand 3 states and 83 transitions. [2024-01-31 16:11:49,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 132 flow [2024-01-31 16:11:49,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:49,737 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 79 flow [2024-01-31 16:11:49,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-01-31 16:11:49,738 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -7 predicate places. [2024-01-31 16:11:49,738 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 79 flow [2024-01-31 16:11:49,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-01-31 16:11:49,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,738 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:49,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:11:49,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:49,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1891774570, now seen corresponding path program 1 times [2024-01-31 16:11:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367908269] [2024-01-31 16:11:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367908269] [2024-01-31 16:11:49,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367908269] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:11:49,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408344853] [2024-01-31 16:11:49,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:49,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:49,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:49,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-01-31 16:11:49,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:49,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:49,889 INFO L124 PetriNetUnfolderBase]: 193/374 cut-off events. [2024-01-31 16:11:49,889 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-01-31 16:11:49,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 374 events. 193/374 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1635 event pairs, 34 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 802. Up to 146 conditions per place. [2024-01-31 16:11:49,893 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 41 selfloop transitions, 10 changer transitions 1/57 dead transitions. [2024-01-31 16:11:49,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 259 flow [2024-01-31 16:11:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-01-31 16:11:49,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810810810810811 [2024-01-31 16:11:49,896 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 79 flow. Second operand 5 states and 126 transitions. [2024-01-31 16:11:49,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 259 flow [2024-01-31 16:11:49,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:49,899 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 129 flow [2024-01-31 16:11:49,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-01-31 16:11:49,902 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-01-31 16:11:49,902 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 129 flow [2024-01-31 16:11:49,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-01-31 16:11:49,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:49,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:11:49,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:49,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash 318826878, now seen corresponding path program 2 times [2024-01-31 16:11:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495004966] [2024-01-31 16:11:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495004966] [2024-01-31 16:11:49,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495004966] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:11:49,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302671331] [2024-01-31 16:11:49,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:49,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:49,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:49,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-01-31 16:11:49,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:50,017 INFO L124 PetriNetUnfolderBase]: 173/330 cut-off events. [2024-01-31 16:11:50,017 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2024-01-31 16:11:50,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 330 events. 173/330 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1398 event pairs, 29 based on Foata normal form. 4/327 useless extension candidates. Maximal degree in co-relation 899. Up to 107 conditions per place. [2024-01-31 16:11:50,020 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 34 selfloop transitions, 12 changer transitions 5/56 dead transitions. [2024-01-31 16:11:50,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 327 flow [2024-01-31 16:11:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-01-31 16:11:50,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432432432432432 [2024-01-31 16:11:50,021 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 129 flow. Second operand 5 states and 119 transitions. [2024-01-31 16:11:50,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 327 flow [2024-01-31 16:11:50,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:11:50,024 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 217 flow [2024-01-31 16:11:50,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-01-31 16:11:50,025 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2024-01-31 16:11:50,025 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 217 flow [2024-01-31 16:11:50,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-01-31 16:11:50,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:50,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:50,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:11:50,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:50,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:50,026 INFO L85 PathProgramCache]: Analyzing trace with hash 803374000, now seen corresponding path program 1 times [2024-01-31 16:11:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:50,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71546302] [2024-01-31 16:11:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:50,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:50,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:50,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71546302] [2024-01-31 16:11:50,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71546302] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:50,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:50,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:11:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228002837] [2024-01-31 16:11:50,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:50,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:50,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:50,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:50,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-01-31 16:11:50,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:50,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:50,160 INFO L124 PetriNetUnfolderBase]: 193/387 cut-off events. [2024-01-31 16:11:50,161 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2024-01-31 16:11:50,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 387 events. 193/387 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1635 event pairs, 34 based on Foata normal form. 10/388 useless extension candidates. Maximal degree in co-relation 1205. Up to 156 conditions per place. [2024-01-31 16:11:50,163 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 55 selfloop transitions, 10 changer transitions 3/73 dead transitions. [2024-01-31 16:11:50,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 73 transitions, 508 flow [2024-01-31 16:11:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-01-31 16:11:50,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6918918918918919 [2024-01-31 16:11:50,165 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 217 flow. Second operand 5 states and 128 transitions. [2024-01-31 16:11:50,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 73 transitions, 508 flow [2024-01-31 16:11:50,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 73 transitions, 504 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-31 16:11:50,168 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 276 flow [2024-01-31 16:11:50,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2024-01-31 16:11:50,169 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2024-01-31 16:11:50,169 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 276 flow [2024-01-31 16:11:50,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-01-31 16:11:50,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:50,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:50,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:11:50,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:50,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:50,171 INFO L85 PathProgramCache]: Analyzing trace with hash 788074152, now seen corresponding path program 2 times [2024-01-31 16:11:50,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:50,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255721832] [2024-01-31 16:11:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:50,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:50,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:50,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255721832] [2024-01-31 16:11:50,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255721832] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:50,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:50,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:11:50,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476093738] [2024-01-31 16:11:50,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:50,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:50,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:50,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-01-31 16:11:50,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:50,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:50,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:50,289 INFO L124 PetriNetUnfolderBase]: 161/322 cut-off events. [2024-01-31 16:11:50,289 INFO L125 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2024-01-31 16:11:50,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 322 events. 161/322 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1292 event pairs, 29 based on Foata normal form. 6/323 useless extension candidates. Maximal degree in co-relation 1119. Up to 136 conditions per place. [2024-01-31 16:11:50,291 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 42 selfloop transitions, 11 changer transitions 8/66 dead transitions. [2024-01-31 16:11:50,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 513 flow [2024-01-31 16:11:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-01-31 16:11:50,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594594594594595 [2024-01-31 16:11:50,292 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 276 flow. Second operand 5 states and 122 transitions. [2024-01-31 16:11:50,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 513 flow [2024-01-31 16:11:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 506 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:50,296 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 345 flow [2024-01-31 16:11:50,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2024-01-31 16:11:50,296 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2024-01-31 16:11:50,297 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 345 flow [2024-01-31 16:11:50,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-01-31 16:11:50,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:50,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:50,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:11:50,297 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:50,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1584761882, now seen corresponding path program 1 times [2024-01-31 16:11:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007857779] [2024-01-31 16:11:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:50,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007857779] [2024-01-31 16:11:50,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007857779] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625738226] [2024-01-31 16:11:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:50,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:50,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:50,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:50,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:11:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:50,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:11:50,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:50,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:50,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625738226] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:50,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:50,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-31 16:11:50,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839430641] [2024-01-31 16:11:50,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:50,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:11:50,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:50,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:11:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:11:50,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:11:50,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 345 flow. Second operand has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 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) [2024-01-31 16:11:50,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:50,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:11:50,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:51,190 INFO L124 PetriNetUnfolderBase]: 405/791 cut-off events. [2024-01-31 16:11:51,191 INFO L125 PetriNetUnfolderBase]: For 3167/3167 co-relation queries the response was YES. [2024-01-31 16:11:51,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3108 conditions, 791 events. 405/791 cut-off events. For 3167/3167 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3973 event pairs, 16 based on Foata normal form. 45/834 useless extension candidates. Maximal degree in co-relation 3058. Up to 192 conditions per place. [2024-01-31 16:11:51,196 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 112 selfloop transitions, 54 changer transitions 11/182 dead transitions. [2024-01-31 16:11:51,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 182 transitions, 1505 flow [2024-01-31 16:11:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:11:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:11:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 405 transitions. [2024-01-31 16:11:51,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472972972972973 [2024-01-31 16:11:51,198 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 345 flow. Second operand 20 states and 405 transitions. [2024-01-31 16:11:51,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 182 transitions, 1505 flow [2024-01-31 16:11:51,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 182 transitions, 1473 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-01-31 16:11:51,205 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 994 flow [2024-01-31 16:11:51,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=994, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2024-01-31 16:11:51,205 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 51 predicate places. [2024-01-31 16:11:51,205 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 994 flow [2024-01-31 16:11:51,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 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) [2024-01-31 16:11:51,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:51,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:51,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:11:51,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 16:11:51,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:51,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 925573148, now seen corresponding path program 2 times [2024-01-31 16:11:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:51,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027983382] [2024-01-31 16:11:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:51,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:51,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:51,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027983382] [2024-01-31 16:11:51,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027983382] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:51,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961059740] [2024-01-31 16:11:51,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:11:51,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:51,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:51,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:51,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:11:51,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:11:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:51,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:11:51,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:51,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:11:51,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961059740] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:51,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:51,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 10 [2024-01-31 16:11:51,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106363084] [2024-01-31 16:11:51,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:51,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:11:51,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:11:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:11:51,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:11:51,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 994 flow. Second operand has 10 states, 10 states have (on average 17.3) internal successors, (173), 10 states have internal predecessors, (173), 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) [2024-01-31 16:11:51,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:51,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:11:51,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:52,084 INFO L124 PetriNetUnfolderBase]: 597/1179 cut-off events. [2024-01-31 16:11:52,084 INFO L125 PetriNetUnfolderBase]: For 8483/8483 co-relation queries the response was YES. [2024-01-31 16:11:52,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5637 conditions, 1179 events. 597/1179 cut-off events. For 8483/8483 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6609 event pairs, 62 based on Foata normal form. 27/1204 useless extension candidates. Maximal degree in co-relation 5570. Up to 626 conditions per place. [2024-01-31 16:11:52,095 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 142 selfloop transitions, 48 changer transitions 1/196 dead transitions. [2024-01-31 16:11:52,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 196 transitions, 2263 flow [2024-01-31 16:11:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:11:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:11:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-01-31 16:11:52,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878378378378378 [2024-01-31 16:11:52,097 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 994 flow. Second operand 12 states and 261 transitions. [2024-01-31 16:11:52,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 196 transitions, 2263 flow [2024-01-31 16:11:52,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 196 transitions, 2101 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:52,142 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1535 flow [2024-01-31 16:11:52,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1535, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-01-31 16:11:52,143 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 64 predicate places. [2024-01-31 16:11:52,143 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1535 flow [2024-01-31 16:11:52,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.3) internal successors, (173), 10 states have internal predecessors, (173), 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) [2024-01-31 16:11:52,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:52,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:52,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 16:11:52,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-31 16:11:52,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:52,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash 348708728, now seen corresponding path program 3 times [2024-01-31 16:11:52,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:52,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806605426] [2024-01-31 16:11:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806605426] [2024-01-31 16:11:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806605426] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820549644] [2024-01-31 16:11:52,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:11:52,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:52,450 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) [2024-01-31 16:11:52,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:11:52,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 16:11:52,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:52,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:11:52,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:52,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:52,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820549644] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:52,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:52,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-01-31 16:11:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322077998] [2024-01-31 16:11:52,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:11:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:11:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:11:52,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:52,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1535 flow. Second operand has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 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) [2024-01-31 16:11:52,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:52,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:52,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:52,900 INFO L124 PetriNetUnfolderBase]: 751/1479 cut-off events. [2024-01-31 16:11:52,900 INFO L125 PetriNetUnfolderBase]: For 12355/12355 co-relation queries the response was YES. [2024-01-31 16:11:52,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7302 conditions, 1479 events. 751/1479 cut-off events. For 12355/12355 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8653 event pairs, 69 based on Foata normal form. 8/1483 useless extension candidates. Maximal degree in co-relation 7229. Up to 385 conditions per place. [2024-01-31 16:11:52,910 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 105 selfloop transitions, 88 changer transitions 5/203 dead transitions. [2024-01-31 16:11:52,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 203 transitions, 2663 flow [2024-01-31 16:11:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:11:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:11:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-01-31 16:11:52,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5995085995085995 [2024-01-31 16:11:52,912 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1535 flow. Second operand 11 states and 244 transitions. [2024-01-31 16:11:52,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 203 transitions, 2663 flow [2024-01-31 16:11:52,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 203 transitions, 2603 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-01-31 16:11:52,955 INFO L231 Difference]: Finished difference. Result has 115 places, 152 transitions, 2233 flow [2024-01-31 16:11:52,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2233, PETRI_PLACES=115, PETRI_TRANSITIONS=152} [2024-01-31 16:11:52,958 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 78 predicate places. [2024-01-31 16:11:52,972 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 152 transitions, 2233 flow [2024-01-31 16:11:52,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 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) [2024-01-31 16:11:52,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:52,972 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:52,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:53,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:53,184 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:53,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2041822106, now seen corresponding path program 4 times [2024-01-31 16:11:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:53,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593153922] [2024-01-31 16:11:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:11:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593153922] [2024-01-31 16:11:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593153922] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539656083] [2024-01-31 16:11:53,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:11:53,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:53,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:53,246 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) [2024-01-31 16:11:53,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:11:53,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:11:53,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:53,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:11:53,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:53,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:53,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539656083] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:53,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:53,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-01-31 16:11:53,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49006290] [2024-01-31 16:11:53,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:53,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:11:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:11:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:11:53,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:11:53,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 152 transitions, 2233 flow. Second operand has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 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) [2024-01-31 16:11:53,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:53,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:11:53,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:53,808 INFO L124 PetriNetUnfolderBase]: 832/1677 cut-off events. [2024-01-31 16:11:53,808 INFO L125 PetriNetUnfolderBase]: For 20528/20528 co-relation queries the response was YES. [2024-01-31 16:11:53,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9202 conditions, 1677 events. 832/1677 cut-off events. For 20528/20528 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10323 event pairs, 32 based on Foata normal form. 10/1685 useless extension candidates. Maximal degree in co-relation 9122. Up to 363 conditions per place. [2024-01-31 16:11:53,820 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 146 selfloop transitions, 112 changer transitions 0/263 dead transitions. [2024-01-31 16:11:53,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 263 transitions, 3536 flow [2024-01-31 16:11:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:11:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:11:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 335 transitions. [2024-01-31 16:11:53,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658783783783784 [2024-01-31 16:11:53,822 INFO L175 Difference]: Start difference. First operand has 115 places, 152 transitions, 2233 flow. Second operand 16 states and 335 transitions. [2024-01-31 16:11:53,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 263 transitions, 3536 flow [2024-01-31 16:11:53,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 263 transitions, 3334 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-01-31 16:11:53,889 INFO L231 Difference]: Finished difference. Result has 128 places, 174 transitions, 2768 flow [2024-01-31 16:11:53,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2768, PETRI_PLACES=128, PETRI_TRANSITIONS=174} [2024-01-31 16:11:53,890 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 91 predicate places. [2024-01-31 16:11:53,891 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 174 transitions, 2768 flow [2024-01-31 16:11:53,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 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) [2024-01-31 16:11:53,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:53,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:53,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 16:11:54,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:54,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:54,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash -556636244, now seen corresponding path program 5 times [2024-01-31 16:11:54,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:54,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86717117] [2024-01-31 16:11:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:54,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:54,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:54,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86717117] [2024-01-31 16:11:54,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86717117] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:54,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232766037] [2024-01-31 16:11:54,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:11:54,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:54,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:54,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:54,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:11:54,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:11:54,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:54,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:11:54,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:54,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:54,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232766037] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:54,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:54,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-01-31 16:11:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740016740] [2024-01-31 16:11:54,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:11:54,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:11:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:11:54,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:54,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 174 transitions, 2768 flow. Second operand has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 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) [2024-01-31 16:11:54,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:54,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:54,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:54,748 INFO L124 PetriNetUnfolderBase]: 932/1911 cut-off events. [2024-01-31 16:11:54,748 INFO L125 PetriNetUnfolderBase]: For 27090/27090 co-relation queries the response was YES. [2024-01-31 16:11:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 1911 events. 932/1911 cut-off events. For 27090/27090 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12088 event pairs, 109 based on Foata normal form. 36/1943 useless extension candidates. Maximal degree in co-relation 10699. Up to 527 conditions per place. [2024-01-31 16:11:54,762 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 163 selfloop transitions, 85 changer transitions 14/267 dead transitions. [2024-01-31 16:11:54,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 267 transitions, 4305 flow [2024-01-31 16:11:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:11:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:11:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-01-31 16:11:54,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6405405405405405 [2024-01-31 16:11:54,764 INFO L175 Difference]: Start difference. First operand has 128 places, 174 transitions, 2768 flow. Second operand 10 states and 237 transitions. [2024-01-31 16:11:54,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 267 transitions, 4305 flow [2024-01-31 16:11:54,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 267 transitions, 4145 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:54,835 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 3291 flow [2024-01-31 16:11:54,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3291, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-01-31 16:11:54,836 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 100 predicate places. [2024-01-31 16:11:54,836 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 3291 flow [2024-01-31 16:11:54,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 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) [2024-01-31 16:11:54,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:54,837 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:54,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:55,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 16:11:55,052 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:55,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1595040896, now seen corresponding path program 6 times [2024-01-31 16:11:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:55,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836981009] [2024-01-31 16:11:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:55,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836981009] [2024-01-31 16:11:55,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836981009] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445708344] [2024-01-31 16:11:55,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:11:55,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:55,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:55,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:11:55,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:11:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:55,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:11:55,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:55,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:55,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445708344] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:55,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:55,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-01-31 16:11:55,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313175606] [2024-01-31 16:11:55,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:55,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:11:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:11:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:11:55,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:11:55,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 3291 flow. Second operand has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 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) [2024-01-31 16:11:55,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:55,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:11:55,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:55,766 INFO L124 PetriNetUnfolderBase]: 972/2034 cut-off events. [2024-01-31 16:11:55,766 INFO L125 PetriNetUnfolderBase]: For 27352/27352 co-relation queries the response was YES. [2024-01-31 16:11:55,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11526 conditions, 2034 events. 972/2034 cut-off events. For 27352/27352 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13236 event pairs, 76 based on Foata normal form. 8/2040 useless extension candidates. Maximal degree in co-relation 11440. Up to 567 conditions per place. [2024-01-31 16:11:55,797 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 186 selfloop transitions, 115 changer transitions 0/306 dead transitions. [2024-01-31 16:11:55,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 306 transitions, 4893 flow [2024-01-31 16:11:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:11:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:11:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 327 transitions. [2024-01-31 16:11:55,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523648648648649 [2024-01-31 16:11:55,799 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 3291 flow. Second operand 16 states and 327 transitions. [2024-01-31 16:11:55,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 306 transitions, 4893 flow [2024-01-31 16:11:55,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 306 transitions, 4685 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:55,927 INFO L231 Difference]: Finished difference. Result has 151 places, 217 transitions, 3894 flow [2024-01-31 16:11:55,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3894, PETRI_PLACES=151, PETRI_TRANSITIONS=217} [2024-01-31 16:11:55,928 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 114 predicate places. [2024-01-31 16:11:55,928 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 217 transitions, 3894 flow [2024-01-31 16:11:55,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 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) [2024-01-31 16:11:55,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:55,928 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:55,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:56,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:11:56,140 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:56,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2018774296, now seen corresponding path program 7 times [2024-01-31 16:11:56,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:56,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199999464] [2024-01-31 16:11:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:56,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:11:56,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199999464] [2024-01-31 16:11:56,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199999464] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742858991] [2024-01-31 16:11:56,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:11:56,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:56,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:56,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:56,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:11:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:56,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:11:56,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:56,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:56,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742858991] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:56,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:56,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-01-31 16:11:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268112646] [2024-01-31 16:11:56,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:56,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:11:56,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:11:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:11:56,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:11:56,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 217 transitions, 3894 flow. Second operand has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 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) [2024-01-31 16:11:56,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:56,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:11:56,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:56,779 INFO L124 PetriNetUnfolderBase]: 938/1957 cut-off events. [2024-01-31 16:11:56,780 INFO L125 PetriNetUnfolderBase]: For 24520/24520 co-relation queries the response was YES. [2024-01-31 16:11:56,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11233 conditions, 1957 events. 938/1957 cut-off events. For 24520/24520 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12558 event pairs, 131 based on Foata normal form. 12/1965 useless extension candidates. Maximal degree in co-relation 11145. Up to 653 conditions per place. [2024-01-31 16:11:56,795 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 166 selfloop transitions, 99 changer transitions 3/273 dead transitions. [2024-01-31 16:11:56,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 273 transitions, 4977 flow [2024-01-31 16:11:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:11:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:11:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-01-31 16:11:56,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-01-31 16:11:56,798 INFO L175 Difference]: Start difference. First operand has 151 places, 217 transitions, 3894 flow. Second operand 12 states and 234 transitions. [2024-01-31 16:11:56,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 273 transitions, 4977 flow [2024-01-31 16:11:56,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 273 transitions, 4875 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-01-31 16:11:56,886 INFO L231 Difference]: Finished difference. Result has 162 places, 225 transitions, 4196 flow [2024-01-31 16:11:56,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4196, PETRI_PLACES=162, PETRI_TRANSITIONS=225} [2024-01-31 16:11:56,887 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 125 predicate places. [2024-01-31 16:11:56,887 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 225 transitions, 4196 flow [2024-01-31 16:11:56,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 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) [2024-01-31 16:11:56,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:56,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:56,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:57,100 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:57,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:57,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1040970286, now seen corresponding path program 8 times [2024-01-31 16:11:57,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:57,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193035896] [2024-01-31 16:11:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:57,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:57,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:57,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193035896] [2024-01-31 16:11:57,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193035896] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:57,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071302344] [2024-01-31 16:11:57,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:11:57,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:57,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:57,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:57,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:11:57,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:11:57,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:57,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:11:57,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:11:57,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:11:57,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071302344] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:57,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:11:57,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-01-31 16:11:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133937666] [2024-01-31 16:11:57,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:57,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:11:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:11:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:11:57,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:57,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 225 transitions, 4196 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 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) [2024-01-31 16:11:57,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:57,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:57,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:57,903 INFO L124 PetriNetUnfolderBase]: 940/1960 cut-off events. [2024-01-31 16:11:57,903 INFO L125 PetriNetUnfolderBase]: For 27702/27702 co-relation queries the response was YES. [2024-01-31 16:11:57,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11735 conditions, 1960 events. 940/1960 cut-off events. For 27702/27702 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12713 event pairs, 69 based on Foata normal form. 4/1962 useless extension candidates. Maximal degree in co-relation 11641. Up to 662 conditions per place. [2024-01-31 16:11:57,917 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 121 selfloop transitions, 101 changer transitions 53/280 dead transitions. [2024-01-31 16:11:57,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 280 transitions, 5307 flow [2024-01-31 16:11:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:11:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:11:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-01-31 16:11:57,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047297297297297 [2024-01-31 16:11:57,918 INFO L175 Difference]: Start difference. First operand has 162 places, 225 transitions, 4196 flow. Second operand 8 states and 179 transitions. [2024-01-31 16:11:57,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 280 transitions, 5307 flow [2024-01-31 16:11:58,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 280 transitions, 5209 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-01-31 16:11:58,017 INFO L231 Difference]: Finished difference. Result has 168 places, 194 transitions, 3763 flow [2024-01-31 16:11:58,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3763, PETRI_PLACES=168, PETRI_TRANSITIONS=194} [2024-01-31 16:11:58,017 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 131 predicate places. [2024-01-31 16:11:58,018 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 194 transitions, 3763 flow [2024-01-31 16:11:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 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) [2024-01-31 16:11:58,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:58,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:58,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:58,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:11:58,235 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:58,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash 620630126, now seen corresponding path program 9 times [2024-01-31 16:11:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:58,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98815639] [2024-01-31 16:11:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:58,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:58,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:58,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98815639] [2024-01-31 16:11:58,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98815639] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:58,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807585906] [2024-01-31 16:11:58,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:11:58,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:58,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:58,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:11:58,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:11:58,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:58,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:11:58,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:11:58,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:11:58,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807585906] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:58,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:58,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-01-31 16:11:58,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953066193] [2024-01-31 16:11:58,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:58,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:11:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:11:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:11:58,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:11:58,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 194 transitions, 3763 flow. Second operand has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 states have internal predecessors, (321), 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) [2024-01-31 16:11:58,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:58,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:11:58,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:59,104 INFO L124 PetriNetUnfolderBase]: 788/1661 cut-off events. [2024-01-31 16:11:59,105 INFO L125 PetriNetUnfolderBase]: For 30873/30873 co-relation queries the response was YES. [2024-01-31 16:11:59,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10682 conditions, 1661 events. 788/1661 cut-off events. For 30873/30873 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10321 event pairs, 46 based on Foata normal form. 36/1695 useless extension candidates. Maximal degree in co-relation 10588. Up to 582 conditions per place. [2024-01-31 16:11:59,118 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 82 selfloop transitions, 170 changer transitions 49/306 dead transitions. [2024-01-31 16:11:59,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 306 transitions, 5794 flow [2024-01-31 16:11:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:11:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:11:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 426 transitions. [2024-01-31 16:11:59,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482625482625483 [2024-01-31 16:11:59,119 INFO L175 Difference]: Start difference. First operand has 168 places, 194 transitions, 3763 flow. Second operand 21 states and 426 transitions. [2024-01-31 16:11:59,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 306 transitions, 5794 flow [2024-01-31 16:11:59,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 306 transitions, 5298 flow, removed 54 selfloop flow, removed 12 redundant places. [2024-01-31 16:11:59,202 INFO L231 Difference]: Finished difference. Result has 180 places, 219 transitions, 4380 flow [2024-01-31 16:11:59,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4380, PETRI_PLACES=180, PETRI_TRANSITIONS=219} [2024-01-31 16:11:59,203 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 143 predicate places. [2024-01-31 16:11:59,203 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 219 transitions, 4380 flow [2024-01-31 16:11:59,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 states have internal predecessors, (321), 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) [2024-01-31 16:11:59,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:59,203 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:59,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 16:11:59,415 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:11:59,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash 437735186, now seen corresponding path program 10 times [2024-01-31 16:11:59,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:59,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025652275] [2024-01-31 16:11:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:59,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025652275] [2024-01-31 16:11:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025652275] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035711900] [2024-01-31 16:11:59,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:11:59,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:59,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:59,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:59,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:11:59,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:11:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:59,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:11:59,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:59,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 16:11:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035711900] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:59,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:59,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 14 [2024-01-31 16:11:59,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567163793] [2024-01-31 16:11:59,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:59,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:11:59,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:11:59,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:11:59,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:11:59,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 219 transitions, 4380 flow. Second operand has 14 states, 14 states have (on average 16.642857142857142) internal successors, (233), 14 states have internal predecessors, (233), 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) [2024-01-31 16:11:59,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:59,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:11:59,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:00,401 INFO L124 PetriNetUnfolderBase]: 1160/2355 cut-off events. [2024-01-31 16:12:00,402 INFO L125 PetriNetUnfolderBase]: For 46005/46005 co-relation queries the response was YES. [2024-01-31 16:12:00,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16800 conditions, 2355 events. 1160/2355 cut-off events. For 46005/46005 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14934 event pairs, 106 based on Foata normal form. 47/2400 useless extension candidates. Maximal degree in co-relation 16704. Up to 687 conditions per place. [2024-01-31 16:12:00,422 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 242 selfloop transitions, 202 changer transitions 17/466 dead transitions. [2024-01-31 16:12:00,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 466 transitions, 9691 flow [2024-01-31 16:12:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:12:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:12:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 446 transitions. [2024-01-31 16:12:00,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240893066980024 [2024-01-31 16:12:00,424 INFO L175 Difference]: Start difference. First operand has 180 places, 219 transitions, 4380 flow. Second operand 23 states and 446 transitions. [2024-01-31 16:12:00,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 466 transitions, 9691 flow [2024-01-31 16:12:00,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 466 transitions, 9100 flow, removed 133 selfloop flow, removed 20 redundant places. [2024-01-31 16:12:00,561 INFO L231 Difference]: Finished difference. Result has 191 places, 344 transitions, 7514 flow [2024-01-31 16:12:00,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4039, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7514, PETRI_PLACES=191, PETRI_TRANSITIONS=344} [2024-01-31 16:12:00,562 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 154 predicate places. [2024-01-31 16:12:00,562 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 344 transitions, 7514 flow [2024-01-31 16:12:00,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.642857142857142) internal successors, (233), 14 states have internal predecessors, (233), 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) [2024-01-31 16:12:00,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:00,563 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:00,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:00,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:00,774 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:00,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash -332826790, now seen corresponding path program 11 times [2024-01-31 16:12:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:00,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846752231] [2024-01-31 16:12:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:00,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:00,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846752231] [2024-01-31 16:12:00,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846752231] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:00,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153837695] [2024-01-31 16:12:00,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:12:00,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:00,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:00,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:00,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:12:00,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-31 16:12:00,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:00,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:12:00,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:12:01,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:12:01,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153837695] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:01,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:12:01,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-01-31 16:12:01,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091465559] [2024-01-31 16:12:01,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:01,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:01,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:01,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:12:01,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:12:01,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 344 transitions, 7514 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 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) [2024-01-31 16:12:01,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:01,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:12:01,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:01,464 INFO L124 PetriNetUnfolderBase]: 1120/2299 cut-off events. [2024-01-31 16:12:01,464 INFO L125 PetriNetUnfolderBase]: For 45499/45499 co-relation queries the response was YES. [2024-01-31 16:12:01,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17229 conditions, 2299 events. 1120/2299 cut-off events. For 45499/45499 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14522 event pairs, 71 based on Foata normal form. 6/2300 useless extension candidates. Maximal degree in co-relation 17134. Up to 587 conditions per place. [2024-01-31 16:12:01,482 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 157 selfloop transitions, 139 changer transitions 78/379 dead transitions. [2024-01-31 16:12:01,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 379 transitions, 8757 flow [2024-01-31 16:12:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:12:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:12:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-01-31 16:12:01,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641891891891891 [2024-01-31 16:12:01,483 INFO L175 Difference]: Start difference. First operand has 191 places, 344 transitions, 7514 flow. Second operand 8 states and 167 transitions. [2024-01-31 16:12:01,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 379 transitions, 8757 flow [2024-01-31 16:12:01,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 379 transitions, 8486 flow, removed 124 selfloop flow, removed 5 redundant places. [2024-01-31 16:12:01,629 INFO L231 Difference]: Finished difference. Result has 194 places, 280 transitions, 6067 flow [2024-01-31 16:12:01,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=194, PETRI_TRANSITIONS=280} [2024-01-31 16:12:01,630 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 157 predicate places. [2024-01-31 16:12:01,630 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 280 transitions, 6067 flow [2024-01-31 16:12:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 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) [2024-01-31 16:12:01,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:01,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:01,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:01,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:01,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:01,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:01,842 INFO L85 PathProgramCache]: Analyzing trace with hash -193269004, now seen corresponding path program 12 times [2024-01-31 16:12:01,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:01,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781535068] [2024-01-31 16:12:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:01,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:01,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:01,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781535068] [2024-01-31 16:12:01,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781535068] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:01,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868060053] [2024-01-31 16:12:01,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:12:01,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:01,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:01,981 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:02,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:12:02,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:12:02,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:02,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:12:02,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:12:02,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:12:02,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868060053] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:02,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:12:02,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-01-31 16:12:02,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112168617] [2024-01-31 16:12:02,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:02,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:02,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:02,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:12:02,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:12:02,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 280 transitions, 6067 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 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) [2024-01-31 16:12:02,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:02,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:12:02,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:02,583 INFO L124 PetriNetUnfolderBase]: 966/2027 cut-off events. [2024-01-31 16:12:02,583 INFO L125 PetriNetUnfolderBase]: For 44511/44511 co-relation queries the response was YES. [2024-01-31 16:12:02,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15843 conditions, 2027 events. 966/2027 cut-off events. For 44511/44511 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12241 event pairs, 35 based on Foata normal form. 5/2027 useless extension candidates. Maximal degree in co-relation 15748. Up to 455 conditions per place. [2024-01-31 16:12:02,602 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 63 selfloop transitions, 351 changer transitions 11/430 dead transitions. [2024-01-31 16:12:02,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 430 transitions, 9921 flow [2024-01-31 16:12:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:12:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:12:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-01-31 16:12:02,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547911547911548 [2024-01-31 16:12:02,604 INFO L175 Difference]: Start difference. First operand has 194 places, 280 transitions, 6067 flow. Second operand 11 states and 223 transitions. [2024-01-31 16:12:02,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 430 transitions, 9921 flow [2024-01-31 16:12:02,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 430 transitions, 9158 flow, removed 26 selfloop flow, removed 13 redundant places. [2024-01-31 16:12:02,731 INFO L231 Difference]: Finished difference. Result has 184 places, 400 transitions, 9199 flow [2024-01-31 16:12:02,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5557, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9199, PETRI_PLACES=184, PETRI_TRANSITIONS=400} [2024-01-31 16:12:02,732 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 147 predicate places. [2024-01-31 16:12:02,732 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 400 transitions, 9199 flow [2024-01-31 16:12:02,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 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) [2024-01-31 16:12:02,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:02,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:02,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:02,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-01-31 16:12:02,944 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:02,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -663323330, now seen corresponding path program 13 times [2024-01-31 16:12:02,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:02,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204766325] [2024-01-31 16:12:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:02,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:03,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204766325] [2024-01-31 16:12:03,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204766325] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:03,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033284671] [2024-01-31 16:12:03,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:12:03,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:03,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:03,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:03,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:12:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:03,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:12:03,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:03,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:03,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033284671] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:03,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:03,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-01-31 16:12:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498423194] [2024-01-31 16:12:03,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:03,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:12:03,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:03,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:12:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:12:03,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:12:03,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 400 transitions, 9199 flow. Second operand has 22 states, 22 states have (on average 17.727272727272727) internal successors, (390), 22 states have internal predecessors, (390), 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) [2024-01-31 16:12:03,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:03,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:12:03,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:04,439 INFO L124 PetriNetUnfolderBase]: 1267/2652 cut-off events. [2024-01-31 16:12:04,439 INFO L125 PetriNetUnfolderBase]: For 60972/60972 co-relation queries the response was YES. [2024-01-31 16:12:04,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22027 conditions, 2652 events. 1267/2652 cut-off events. For 60972/60972 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 17098 event pairs, 54 based on Foata normal form. 25/2673 useless extension candidates. Maximal degree in co-relation 21957. Up to 914 conditions per place. [2024-01-31 16:12:04,463 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 298 selfloop transitions, 331 changer transitions 42/676 dead transitions. [2024-01-31 16:12:04,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 676 transitions, 15926 flow [2024-01-31 16:12:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 16:12:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 16:12:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 699 transitions. [2024-01-31 16:12:04,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5556438791732909 [2024-01-31 16:12:04,466 INFO L175 Difference]: Start difference. First operand has 184 places, 400 transitions, 9199 flow. Second operand 34 states and 699 transitions. [2024-01-31 16:12:04,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 676 transitions, 15926 flow [2024-01-31 16:12:04,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 676 transitions, 15523 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-01-31 16:12:04,679 INFO L231 Difference]: Finished difference. Result has 228 places, 542 transitions, 13835 flow [2024-01-31 16:12:04,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8939, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=13835, PETRI_PLACES=228, PETRI_TRANSITIONS=542} [2024-01-31 16:12:04,680 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 191 predicate places. [2024-01-31 16:12:04,680 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 542 transitions, 13835 flow [2024-01-31 16:12:04,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.727272727272727) internal successors, (390), 22 states have internal predecessors, (390), 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) [2024-01-31 16:12:04,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:04,680 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:04,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-31 16:12:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-01-31 16:12:04,891 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:04,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash -361236804, now seen corresponding path program 14 times [2024-01-31 16:12:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152403746] [2024-01-31 16:12:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:12:04,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:04,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152403746] [2024-01-31 16:12:04,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152403746] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:04,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459752180] [2024-01-31 16:12:04,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:12:04,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:04,948 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:04,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:12:05,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:12:05,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:05,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:12:05,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:05,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:05,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459752180] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:05,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:05,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-01-31 16:12:05,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137357570] [2024-01-31 16:12:05,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:05,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:12:05,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:05,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:12:05,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:12:05,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:12:05,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 542 transitions, 13835 flow. Second operand has 16 states, 16 states have (on average 16.3125) internal successors, (261), 16 states have internal predecessors, (261), 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) [2024-01-31 16:12:05,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:05,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:12:05,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:06,120 INFO L124 PetriNetUnfolderBase]: 1461/3032 cut-off events. [2024-01-31 16:12:06,121 INFO L125 PetriNetUnfolderBase]: For 92736/92736 co-relation queries the response was YES. [2024-01-31 16:12:06,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27774 conditions, 3032 events. 1461/3032 cut-off events. For 92736/92736 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 19553 event pairs, 54 based on Foata normal form. 22/3052 useless extension candidates. Maximal degree in co-relation 27666. Up to 725 conditions per place. [2024-01-31 16:12:06,171 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 307 selfloop transitions, 450 changer transitions 11/773 dead transitions. [2024-01-31 16:12:06,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 773 transitions, 20535 flow [2024-01-31 16:12:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 16:12:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 16:12:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 527 transitions. [2024-01-31 16:12:06,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086872586872587 [2024-01-31 16:12:06,173 INFO L175 Difference]: Start difference. First operand has 228 places, 542 transitions, 13835 flow. Second operand 28 states and 527 transitions. [2024-01-31 16:12:06,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 773 transitions, 20535 flow [2024-01-31 16:12:06,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 773 transitions, 19961 flow, removed 259 selfloop flow, removed 10 redundant places. [2024-01-31 16:12:06,589 INFO L231 Difference]: Finished difference. Result has 253 places, 658 transitions, 18259 flow [2024-01-31 16:12:06,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=13376, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18259, PETRI_PLACES=253, PETRI_TRANSITIONS=658} [2024-01-31 16:12:06,590 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 216 predicate places. [2024-01-31 16:12:06,590 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 658 transitions, 18259 flow [2024-01-31 16:12:06,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.3125) internal successors, (261), 16 states have internal predecessors, (261), 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) [2024-01-31 16:12:06,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:06,591 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:06,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:06,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:06,802 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:06,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:06,802 INFO L85 PathProgramCache]: Analyzing trace with hash -539471802, now seen corresponding path program 15 times [2024-01-31 16:12:06,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:06,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451947452] [2024-01-31 16:12:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:06,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:12:06,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:06,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451947452] [2024-01-31 16:12:06,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451947452] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:06,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015968257] [2024-01-31 16:12:06,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:12:06,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:06,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:06,865 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:06,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:12:06,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:12:06,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:06,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:12:06,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 16:12:06,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:12:06,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015968257] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:06,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:12:06,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 11 [2024-01-31 16:12:06,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452035682] [2024-01-31 16:12:06,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:06,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:06,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:12:07,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:12:07,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 658 transitions, 18259 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 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) [2024-01-31 16:12:07,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:07,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:12:07,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:07,885 INFO L124 PetriNetUnfolderBase]: 1446/2973 cut-off events. [2024-01-31 16:12:07,885 INFO L125 PetriNetUnfolderBase]: For 94613/94613 co-relation queries the response was YES. [2024-01-31 16:12:07,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28612 conditions, 2973 events. 1446/2973 cut-off events. For 94613/94613 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 18953 event pairs, 29 based on Foata normal form. 15/2983 useless extension candidates. Maximal degree in co-relation 28495. Up to 723 conditions per place. [2024-01-31 16:12:07,907 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 32 selfloop transitions, 23 changer transitions 622/682 dead transitions. [2024-01-31 16:12:07,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 682 transitions, 19946 flow [2024-01-31 16:12:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:12:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:12:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-01-31 16:12:07,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-01-31 16:12:07,911 INFO L175 Difference]: Start difference. First operand has 253 places, 658 transitions, 18259 flow. Second operand 11 states and 222 transitions. [2024-01-31 16:12:07,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 682 transitions, 19946 flow [2024-01-31 16:12:08,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 682 transitions, 19278 flow, removed 277 selfloop flow, removed 11 redundant places. [2024-01-31 16:12:08,333 INFO L231 Difference]: Finished difference. Result has 253 places, 56 transitions, 1007 flow [2024-01-31 16:12:08,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=17587, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1007, PETRI_PLACES=253, PETRI_TRANSITIONS=56} [2024-01-31 16:12:08,334 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 216 predicate places. [2024-01-31 16:12:08,334 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 56 transitions, 1007 flow [2024-01-31 16:12:08,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 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) [2024-01-31 16:12:08,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:08,335 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:08,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:08,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:08,546 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:08,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:08,546 INFO L85 PathProgramCache]: Analyzing trace with hash -259439360, now seen corresponding path program 16 times [2024-01-31 16:12:08,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:08,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882862767] [2024-01-31 16:12:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:08,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:12:08,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882862767] [2024-01-31 16:12:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882862767] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129748202] [2024-01-31 16:12:08,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:12:08,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:08,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:08,615 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:08,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:12:08,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:12:08,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:08,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:12:08,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:08,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:08,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129748202] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:08,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:08,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-01-31 16:12:08,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704366137] [2024-01-31 16:12:08,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:08,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:12:08,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:08,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:12:08,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:12:08,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:12:08,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 56 transitions, 1007 flow. Second operand has 16 states, 16 states have (on average 16.3125) internal successors, (261), 16 states have internal predecessors, (261), 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) [2024-01-31 16:12:08,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:08,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:12:08,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:09,130 INFO L124 PetriNetUnfolderBase]: 191/490 cut-off events. [2024-01-31 16:12:09,130 INFO L125 PetriNetUnfolderBase]: For 9909/9909 co-relation queries the response was YES. [2024-01-31 16:12:09,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3453 conditions, 490 events. 191/490 cut-off events. For 9909/9909 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2137 event pairs, 12 based on Foata normal form. 6/495 useless extension candidates. Maximal degree in co-relation 3379. Up to 88 conditions per place. [2024-01-31 16:12:09,134 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 97 selfloop transitions, 31 changer transitions 22/155 dead transitions. [2024-01-31 16:12:09,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 155 transitions, 2547 flow [2024-01-31 16:12:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:12:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:12:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 312 transitions. [2024-01-31 16:12:09,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-01-31 16:12:09,135 INFO L175 Difference]: Start difference. First operand has 253 places, 56 transitions, 1007 flow. Second operand 16 states and 312 transitions. [2024-01-31 16:12:09,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 155 transitions, 2547 flow [2024-01-31 16:12:09,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 155 transitions, 1301 flow, removed 210 selfloop flow, removed 78 redundant places. [2024-01-31 16:12:09,152 INFO L231 Difference]: Finished difference. Result has 117 places, 70 transitions, 689 flow [2024-01-31 16:12:09,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=689, PETRI_PLACES=117, PETRI_TRANSITIONS=70} [2024-01-31 16:12:09,152 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 80 predicate places. [2024-01-31 16:12:09,152 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 70 transitions, 689 flow [2024-01-31 16:12:09,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.3125) internal successors, (261), 16 states have internal predecessors, (261), 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) [2024-01-31 16:12:09,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:09,153 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:09,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:09,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-31 16:12:09,364 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:09,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1995916438, now seen corresponding path program 17 times [2024-01-31 16:12:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:09,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426199768] [2024-01-31 16:12:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:09,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:09,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426199768] [2024-01-31 16:12:09,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426199768] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:09,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436834486] [2024-01-31 16:12:09,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:12:09,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:09,494 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:09,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 16:12:09,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-31 16:12:09,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:09,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:12:09,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:12:09,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:12:09,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436834486] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:09,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:09,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-01-31 16:12:09,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241088942] [2024-01-31 16:12:09,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:09,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:12:09,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:09,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:12:09,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:12:09,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:12:09,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 70 transitions, 689 flow. Second operand has 20 states, 20 states have (on average 17.8) internal successors, (356), 20 states have internal predecessors, (356), 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) [2024-01-31 16:12:09,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:09,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:12:09,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:10,041 INFO L124 PetriNetUnfolderBase]: 205/537 cut-off events. [2024-01-31 16:12:10,041 INFO L125 PetriNetUnfolderBase]: For 2066/2066 co-relation queries the response was YES. [2024-01-31 16:12:10,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 537 events. 205/537 cut-off events. For 2066/2066 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2489 event pairs, 0 based on Foata normal form. 13/549 useless extension candidates. Maximal degree in co-relation 2195. Up to 118 conditions per place. [2024-01-31 16:12:10,045 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 58 selfloop transitions, 49 changer transitions 22/134 dead transitions. [2024-01-31 16:12:10,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 134 transitions, 1276 flow [2024-01-31 16:12:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:12:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:12:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 413 transitions. [2024-01-31 16:12:10,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2024-01-31 16:12:10,047 INFO L175 Difference]: Start difference. First operand has 117 places, 70 transitions, 689 flow. Second operand 21 states and 413 transitions. [2024-01-31 16:12:10,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 134 transitions, 1276 flow [2024-01-31 16:12:10,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 134 transitions, 1199 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-01-31 16:12:10,053 INFO L231 Difference]: Finished difference. Result has 134 places, 76 transitions, 818 flow [2024-01-31 16:12:10,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=818, PETRI_PLACES=134, PETRI_TRANSITIONS=76} [2024-01-31 16:12:10,054 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 97 predicate places. [2024-01-31 16:12:10,054 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 76 transitions, 818 flow [2024-01-31 16:12:10,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.8) internal successors, (356), 20 states have internal predecessors, (356), 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) [2024-01-31 16:12:10,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:10,055 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:10,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:10,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 16:12:10,269 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:10,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash -388558618, now seen corresponding path program 18 times [2024-01-31 16:12:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:10,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731694868] [2024-01-31 16:12:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:10,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:10,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731694868] [2024-01-31 16:12:10,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731694868] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:10,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385672077] [2024-01-31 16:12:10,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:12:10,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:10,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:10,384 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:10,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 16:12:10,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:12:10,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:10,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:12:10,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-31 16:12:10,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-31 16:12:10,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385672077] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:10,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:10,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-01-31 16:12:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591386000] [2024-01-31 16:12:10,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:10,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:12:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:12:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:12:10,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:12:10,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 76 transitions, 818 flow. Second operand has 20 states, 20 states have (on average 17.7) internal successors, (354), 20 states have internal predecessors, (354), 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) [2024-01-31 16:12:10,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:10,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:12:10,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:11,118 INFO L124 PetriNetUnfolderBase]: 207/571 cut-off events. [2024-01-31 16:12:11,118 INFO L125 PetriNetUnfolderBase]: For 2693/2693 co-relation queries the response was YES. [2024-01-31 16:12:11,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 571 events. 207/571 cut-off events. For 2693/2693 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2619 event pairs, 10 based on Foata normal form. 18/588 useless extension candidates. Maximal degree in co-relation 2416. Up to 108 conditions per place. [2024-01-31 16:12:11,122 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 50 selfloop transitions, 59 changer transitions 65/179 dead transitions. [2024-01-31 16:12:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 179 transitions, 1740 flow [2024-01-31 16:12:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 16:12:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 16:12:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 573 transitions. [2024-01-31 16:12:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340167753960857 [2024-01-31 16:12:11,123 INFO L175 Difference]: Start difference. First operand has 134 places, 76 transitions, 818 flow. Second operand 29 states and 573 transitions. [2024-01-31 16:12:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 179 transitions, 1740 flow [2024-01-31 16:12:11,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 179 transitions, 1655 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-01-31 16:12:11,130 INFO L231 Difference]: Finished difference. Result has 161 places, 78 transitions, 914 flow [2024-01-31 16:12:11,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=914, PETRI_PLACES=161, PETRI_TRANSITIONS=78} [2024-01-31 16:12:11,131 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2024-01-31 16:12:11,131 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 78 transitions, 914 flow [2024-01-31 16:12:11,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.7) internal successors, (354), 20 states have internal predecessors, (354), 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) [2024-01-31 16:12:11,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:11,131 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:11,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:11,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 16:12:11,343 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:11,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash 889118932, now seen corresponding path program 19 times [2024-01-31 16:12:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:11,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073587567] [2024-01-31 16:12:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:12:11,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:11,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073587567] [2024-01-31 16:12:11,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073587567] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:11,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436650141] [2024-01-31 16:12:11,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:12:11,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:11,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:11,410 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:11,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 16:12:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:11,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:12:11,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:11,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:11,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436650141] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:11,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:11,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2024-01-31 16:12:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038996935] [2024-01-31 16:12:11,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:12:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:11,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:12:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:12:11,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:12:11,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 78 transitions, 914 flow. Second operand has 21 states, 21 states have (on average 16.047619047619047) internal successors, (337), 21 states have internal predecessors, (337), 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) [2024-01-31 16:12:11,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:11,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:12:11,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:12,139 INFO L124 PetriNetUnfolderBase]: 180/524 cut-off events. [2024-01-31 16:12:12,139 INFO L125 PetriNetUnfolderBase]: For 3315/3315 co-relation queries the response was YES. [2024-01-31 16:12:12,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 524 events. 180/524 cut-off events. For 3315/3315 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2349 event pairs, 6 based on Foata normal form. 6/529 useless extension candidates. Maximal degree in co-relation 2614. Up to 133 conditions per place. [2024-01-31 16:12:12,142 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 75 selfloop transitions, 25 changer transitions 68/173 dead transitions. [2024-01-31 16:12:12,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 173 transitions, 2112 flow [2024-01-31 16:12:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:12:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:12:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 349 transitions. [2024-01-31 16:12:12,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49644381223328593 [2024-01-31 16:12:12,144 INFO L175 Difference]: Start difference. First operand has 161 places, 78 transitions, 914 flow. Second operand 19 states and 349 transitions. [2024-01-31 16:12:12,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 173 transitions, 2112 flow [2024-01-31 16:12:12,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 173 transitions, 1868 flow, removed 41 selfloop flow, removed 26 redundant places. [2024-01-31 16:12:12,153 INFO L231 Difference]: Finished difference. Result has 143 places, 77 transitions, 848 flow [2024-01-31 16:12:12,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=848, PETRI_PLACES=143, PETRI_TRANSITIONS=77} [2024-01-31 16:12:12,154 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 106 predicate places. [2024-01-31 16:12:12,154 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 77 transitions, 848 flow [2024-01-31 16:12:12,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 16.047619047619047) internal successors, (337), 21 states have internal predecessors, (337), 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) [2024-01-31 16:12:12,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:12,154 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:12,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:12,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:12,365 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:12,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1610801250, now seen corresponding path program 20 times [2024-01-31 16:12:12,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:12,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769824115] [2024-01-31 16:12:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:12,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:12,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:12,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769824115] [2024-01-31 16:12:12,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769824115] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:12,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709812904] [2024-01-31 16:12:12,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:12:12,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:12,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:12,524 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:12,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 16:12:12,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:12:12,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:12,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 16:12:12,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:12,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:12:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709812904] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:12,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:12,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2024-01-31 16:12:12,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968716052] [2024-01-31 16:12:12,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:12,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:12:12,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:12:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:12:12,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-31 16:12:12,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 77 transitions, 848 flow. Second operand has 26 states, 26 states have (on average 17.153846153846153) internal successors, (446), 26 states have internal predecessors, (446), 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) [2024-01-31 16:12:12,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:12,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-31 16:12:12,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:13,407 INFO L124 PetriNetUnfolderBase]: 236/696 cut-off events. [2024-01-31 16:12:13,407 INFO L125 PetriNetUnfolderBase]: For 3296/3296 co-relation queries the response was YES. [2024-01-31 16:12:13,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 696 events. 236/696 cut-off events. For 3296/3296 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3430 event pairs, 22 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 3273. Up to 137 conditions per place. [2024-01-31 16:12:13,410 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 113 selfloop transitions, 75 changer transitions 26/219 dead transitions. [2024-01-31 16:12:13,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 219 transitions, 2520 flow [2024-01-31 16:12:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:12:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:12:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 584 transitions. [2024-01-31 16:12:13,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261261261261261 [2024-01-31 16:12:13,411 INFO L175 Difference]: Start difference. First operand has 143 places, 77 transitions, 848 flow. Second operand 30 states and 584 transitions. [2024-01-31 16:12:13,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 219 transitions, 2520 flow [2024-01-31 16:12:13,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 219 transitions, 2373 flow, removed 47 selfloop flow, removed 15 redundant places. [2024-01-31 16:12:13,420 INFO L231 Difference]: Finished difference. Result has 155 places, 118 transitions, 1548 flow [2024-01-31 16:12:13,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1548, PETRI_PLACES=155, PETRI_TRANSITIONS=118} [2024-01-31 16:12:13,421 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 118 predicate places. [2024-01-31 16:12:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 118 transitions, 1548 flow [2024-01-31 16:12:13,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.153846153846153) internal successors, (446), 26 states have internal predecessors, (446), 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) [2024-01-31 16:12:13,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:13,422 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:13,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:13,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 16:12:13,633 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:12:13,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1776459652, now seen corresponding path program 21 times [2024-01-31 16:12:13,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:13,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495155445] [2024-01-31 16:12:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:13,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:12:13,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495155445] [2024-01-31 16:12:13,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495155445] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820557920] [2024-01-31 16:12:13,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:12:13,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:13,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:13,748 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:13,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 16:12:13,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:12:13,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:13,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:12:13,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-01-31 16:12:13,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:12:13,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820557920] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:13,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:12:13,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2024-01-31 16:12:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097803497] [2024-01-31 16:12:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:12:13,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:12:13,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 118 transitions, 1548 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 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) [2024-01-31 16:12:13,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:13,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:12:13,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:14,082 INFO L124 PetriNetUnfolderBase]: 233/687 cut-off events. [2024-01-31 16:12:14,083 INFO L125 PetriNetUnfolderBase]: For 3021/3021 co-relation queries the response was YES. [2024-01-31 16:12:14,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3278 conditions, 687 events. 233/687 cut-off events. For 3021/3021 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3389 event pairs, 0 based on Foata normal form. 2/688 useless extension candidates. Maximal degree in co-relation 3238. Up to 188 conditions per place. [2024-01-31 16:12:14,085 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 0 selfloop transitions, 0 changer transitions 136/136 dead transitions. [2024-01-31 16:12:14,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 136 transitions, 1880 flow [2024-01-31 16:12:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:12:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:12:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-01-31 16:12:14,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216216216216216 [2024-01-31 16:12:14,086 INFO L175 Difference]: Start difference. First operand has 155 places, 118 transitions, 1548 flow. Second operand 10 states and 193 transitions. [2024-01-31 16:12:14,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 136 transitions, 1880 flow [2024-01-31 16:12:14,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 136 transitions, 1736 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-01-31 16:12:14,095 INFO L231 Difference]: Finished difference. Result has 144 places, 0 transitions, 0 flow [2024-01-31 16:12:14,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=144, PETRI_TRANSITIONS=0} [2024-01-31 16:12:14,096 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 107 predicate places. [2024-01-31 16:12:14,096 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 0 transitions, 0 flow [2024-01-31 16:12:14,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 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) [2024-01-31 16:12:14,099 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 17 remaining) [2024-01-31 16:12:14,099 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 17 remaining) [2024-01-31 16:12:14,099 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 17 remaining) [2024-01-31 16:12:14,099 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 17 remaining) [2024-01-31 16:12:14,099 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 17 remaining) [2024-01-31 16:12:14,099 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 17 remaining) [2024-01-31 16:12:14,099 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 17 remaining) [2024-01-31 16:12:14,099 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (8 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 17 remaining) [2024-01-31 16:12:14,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 17 remaining) [2024-01-31 16:12:14,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:14,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:14,311 INFO L445 BasicCegarLoop]: Path program histogram: [21, 2, 2, 1, 1, 1, 1, 1] [2024-01-31 16:12:14,316 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-31 16:12:14,316 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-31 16:12:14,319 INFO L503 ceAbstractionStarter]: Automizer considered 8 witness invariants [2024-01-31 16:12:14,319 INFO L504 ceAbstractionStarter]: WitnessConsidered=8 [2024-01-31 16:12:14,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:12:14 BasicIcfg [2024-01-31 16:12:14,320 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-31 16:12:14,320 INFO L158 Benchmark]: Toolchain (without parser) took 26466.92ms. Allocated memory was 182.5MB in the beginning and 899.7MB in the end (delta: 717.2MB). Free memory was 110.2MB in the beginning and 636.5MB in the end (delta: -526.3MB). Peak memory consumption was 192.9MB. Max. memory is 16.1GB. [2024-01-31 16:12:14,320 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 107.0MB. Free memory is still 70.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:12:14,320 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 156.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:12:14,321 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.62ms. Allocated memory is still 182.5MB. Free memory was 110.0MB in the beginning and 152.4MB in the end (delta: -42.4MB). Peak memory consumption was 18.1MB. Max. memory is 16.1GB. [2024-01-31 16:12:14,321 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.63ms. Allocated memory is still 182.5MB. Free memory was 152.4MB in the beginning and 151.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-31 16:12:14,321 INFO L158 Benchmark]: Boogie Preprocessor took 62.41ms. Allocated memory is still 182.5MB. Free memory was 151.0MB in the beginning and 148.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-31 16:12:14,321 INFO L158 Benchmark]: RCFGBuilder took 399.51ms. Allocated memory is still 182.5MB. Free memory was 148.9MB in the beginning and 125.9MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-01-31 16:12:14,321 INFO L158 Benchmark]: TraceAbstraction took 25737.14ms. Allocated memory was 182.5MB in the beginning and 899.7MB in the end (delta: 717.2MB). Free memory was 125.2MB in the beginning and 636.5MB in the end (delta: -511.3MB). Peak memory consumption was 206.3MB. Max. memory is 16.1GB. [2024-01-31 16:12:14,322 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.19ms. Allocated memory is still 107.0MB. Free memory is still 70.8MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 156.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.62ms. Allocated memory is still 182.5MB. Free memory was 110.0MB in the beginning and 152.4MB in the end (delta: -42.4MB). Peak memory consumption was 18.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.63ms. Allocated memory is still 182.5MB. Free memory was 152.4MB in the beginning and 151.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.41ms. Allocated memory is still 182.5MB. Free memory was 151.0MB in the beginning and 148.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 399.51ms. Allocated memory is still 182.5MB. Free memory was 148.9MB in the beginning and 125.9MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 25737.14ms. Allocated memory was 182.5MB in the beginning and 899.7MB in the end (delta: 717.2MB). Free memory was 125.2MB in the beginning and 636.5MB in the end (delta: -511.3MB). Peak memory consumption was 206.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 45]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 42]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 49]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 53]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 59]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 17 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 25.7s, OverallIterations: 30, TraceHistogramMax: 6, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 13.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2613 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2457 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 43 mSDsCounter, 522 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8354 IncrementalHoareTripleChecker+Invalid, 8876 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 522 mSolverCounterUnsat, 38 mSDtfsCounter, 8354 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1601 GetRequests, 1130 SyntacticMatches, 11 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18259occurred in iteration=23, InterpolantAutomatonStates: 403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 1535 NumberOfCodeBlocks, 1500 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1992 ConstructedInterpolants, 0 QuantifiedInterpolants, 8860 SizeOfPredicates, 15 NumberOfNonLiveVariables, 3376 ConjunctsInSsa, 154 ConjunctsInUnsatCore, 67 InterpolantComputations, 14 PerfectInterpolantSequences, 570/1144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-31 16:12:14,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE