./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe029_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe029_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/pthread-wmm/safe029_tso.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe029_tso.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.witness-ghost-b44c828-m [2024-05-12 10:42:49,247 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:42:49,284 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:42:49,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:42:49,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:42:49,304 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:42:49,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:42:49,306 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:42:49,307 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:42:49,310 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:42:49,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:42:49,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:42:49,311 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:42:49,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:42:49,312 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:42:49,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:42:49,312 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:42:49,312 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:42:49,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:42:49,313 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:42:49,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:42:49,314 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:42:49,314 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:42:49,314 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:42:49,315 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:42:49,315 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:42:49,315 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:42:49,315 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:42:49,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:42:49,316 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:42:49,316 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:42:49,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:42:49,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:42:49,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:42:49,317 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:42:49,317 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:42:49,317 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:42:49,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:42:49,318 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:42:49,318 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:42:49,318 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:42:49,318 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:42:49,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:42:49,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:42:49,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:42:49,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:42:49,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:42:49,529 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:42:49,530 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:42:49,531 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe029_tso.yml/witness.yml [2024-05-12 10:42:49,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:42:49,642 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:42:49,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe029_tso.i [2024-05-12 10:42:50,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:42:50,752 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:42:50,753 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_tso.i [2024-05-12 10:42:50,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2b3dd7d6/d6a9b3ee1b57415393d9f059e196d34c/FLAGc8e3ff15c [2024-05-12 10:42:50,772 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2b3dd7d6/d6a9b3ee1b57415393d9f059e196d34c [2024-05-12 10:42:50,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:42:50,773 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:42:50,774 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:42:50,774 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:42:50,778 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:42:50,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:42:49" (1/2) ... [2024-05-12 10:42:50,779 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0d2c8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:50, skipping insertion in model container [2024-05-12 10:42:50,779 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:42:49" (1/2) ... [2024-05-12 10:42:50,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e58d853 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:50, skipping insertion in model container [2024-05-12 10:42:50,781 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:42:50" (2/2) ... [2024-05-12 10:42:50,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0d2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:50, skipping insertion in model container [2024-05-12 10:42:50,781 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:42:50" (2/2) ... [2024-05-12 10:42:50,781 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:42:50,806 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:42:50,807 INFO L97 edCorrectnessWitness]: Location invariant before [L760-L760] ((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && 0 <= x) && 0 <= y) && y <= 2) && y <= 127) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-05-12 10:42:50,807 INFO L97 edCorrectnessWitness]: Location invariant before [L759-L759] ((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && 0 <= x) && 0 <= y) && y <= 2) && y <= 127) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-05-12 10:42:50,807 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:42:50,807 INFO L106 edCorrectnessWitness]: ghost_update [L757-L757] multithreaded = 1; [2024-05-12 10:42:50,834 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:42:50,957 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_tso.i[945,958] [2024-05-12 10:42:51,076 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:42:51,083 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:42:51,115 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:42:51,225 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:42:51,250 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:42:51,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51 WrapperNode [2024-05-12 10:42:51,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:42:51,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:42:51,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:42:51,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:42:51,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,280 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-05-12 10:42:51,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:42:51,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:42:51,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:42:51,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:42:51,289 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,291 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,300 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 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]. [2024-05-12 10:42:51,300 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,309 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:42:51,312 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:42:51,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:42:51,312 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:42:51,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (1/1) ... [2024-05-12 10:42:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:42:51,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:42:51,333 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) [2024-05-12 10:42:51,346 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 [2024-05-12 10:42:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:42:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:42:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:42:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:42:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:42:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:42:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:42:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:42:51,362 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:42:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:42:51,362 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:42:51,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:42:51,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:42:51,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:42:51,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:42:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:42:51,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:42:51,366 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:42:51,472 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:42:51,474 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:42:51,598 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:42:51,598 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:42:51,643 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:42:51,643 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:42:51,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:42:51 BoogieIcfgContainer [2024-05-12 10:42:51,644 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:42:51,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:42:51,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:42:51,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:42:51,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:42:49" (1/4) ... [2024-05-12 10:42:51,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192f864c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:42:51, skipping insertion in model container [2024-05-12 10:42:51,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:42:50" (2/4) ... [2024-05-12 10:42:51,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192f864c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:42:51, skipping insertion in model container [2024-05-12 10:42:51,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:51" (3/4) ... [2024-05-12 10:42:51,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192f864c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:42:51, skipping insertion in model container [2024-05-12 10:42:51,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:42:51" (4/4) ... [2024-05-12 10:42:51,650 INFO L112 eAbstractionObserver]: Analyzing ICFG safe029_tso.i [2024-05-12 10:42:51,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:42:51,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 10:42:51,662 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:42:51,685 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:42:51,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 78 flow [2024-05-12 10:42:51,740 INFO L124 PetriNetUnfolderBase]: 1/33 cut-off events. [2024-05-12 10:42:51,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:42:51,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 1/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-05-12 10:42:51,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 78 flow [2024-05-12 10:42:51,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 30 transitions, 66 flow [2024-05-12 10:42:51,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:42:51,761 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;@585d0b00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:42:51,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 10:42:51,764 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:42:51,764 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-05-12 10:42:51,765 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:42:51,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:51,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:42:51,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:51,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1401693771, now seen corresponding path program 1 times [2024-05-12 10:42:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:51,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120889057] [2024-05-12 10:42:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:51,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:52,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:52,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120889057] [2024-05-12 10:42:52,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120889057] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:52,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:52,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:42:52,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496776747] [2024-05-12 10:42:52,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:52,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:42:52,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:52,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:42:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:42:52,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:52,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-05-12 10:42:52,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:52,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:52,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:52,333 INFO L124 PetriNetUnfolderBase]: 189/374 cut-off events. [2024-05-12 10:42:52,333 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-05-12 10:42:52,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 374 events. 189/374 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1798 event pairs, 129 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 711. Up to 326 conditions per place. [2024-05-12 10:42:52,337 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-05-12 10:42:52,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 141 flow [2024-05-12 10:42:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:42:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:42:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-05-12 10:42:52,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-05-12 10:42:52,349 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 66 flow. Second operand 3 states and 69 transitions. [2024-05-12 10:42:52,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 141 flow [2024-05-12 10:42:52,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:52,353 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 85 flow [2024-05-12 10:42:52,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-05-12 10:42:52,358 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-05-12 10:42:52,358 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 85 flow [2024-05-12 10:42:52,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-05-12 10:42:52,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:52,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:52,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:42:52,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:52,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1591691754, now seen corresponding path program 1 times [2024-05-12 10:42:52,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:52,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061558284] [2024-05-12 10:42:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:52,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:52,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061558284] [2024-05-12 10:42:52,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061558284] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:52,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:52,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:42:52,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022644166] [2024-05-12 10:42:52,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:52,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:42:52,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:52,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:42:52,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:42:52,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:52,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2024-05-12 10:42:52,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:52,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:52,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:52,610 INFO L124 PetriNetUnfolderBase]: 186/390 cut-off events. [2024-05-12 10:42:52,610 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-05-12 10:42:52,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 390 events. 186/390 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1824 event pairs, 79 based on Foata normal form. 2/384 useless extension candidates. Maximal degree in co-relation 809. Up to 308 conditions per place. [2024-05-12 10:42:52,614 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 31 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-05-12 10:42:52,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 191 flow [2024-05-12 10:42:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:42:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:42:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-05-12 10:42:52,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-05-12 10:42:52,615 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 85 flow. Second operand 4 states and 90 transitions. [2024-05-12 10:42:52,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 191 flow [2024-05-12 10:42:52,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:42:52,617 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 109 flow [2024-05-12 10:42:52,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-05-12 10:42:52,618 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2024-05-12 10:42:52,618 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 109 flow [2024-05-12 10:42:52,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2024-05-12 10:42:52,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:52,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:52,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:42:52,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:52,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2106740202, now seen corresponding path program 1 times [2024-05-12 10:42:52,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:52,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402605827] [2024-05-12 10:42:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:52,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:52,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402605827] [2024-05-12 10:42:52,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402605827] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:52,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:52,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:42:52,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970136715] [2024-05-12 10:42:52,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:52,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:52,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:52,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:52,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:52,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:52,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-05-12 10:42:52,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:52,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:52,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:52,884 INFO L124 PetriNetUnfolderBase]: 208/433 cut-off events. [2024-05-12 10:42:52,885 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-05-12 10:42:52,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 433 events. 208/433 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2124 event pairs, 42 based on Foata normal form. 4/429 useless extension candidates. Maximal degree in co-relation 971. Up to 239 conditions per place. [2024-05-12 10:42:52,891 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 43 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-05-12 10:42:52,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 313 flow [2024-05-12 10:42:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-05-12 10:42:52,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6971428571428572 [2024-05-12 10:42:52,896 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 109 flow. Second operand 5 states and 122 transitions. [2024-05-12 10:42:52,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 313 flow [2024-05-12 10:42:52,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 304 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:52,901 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 197 flow [2024-05-12 10:42:52,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-05-12 10:42:52,902 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2024-05-12 10:42:52,903 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 197 flow [2024-05-12 10:42:52,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-05-12 10:42:52,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:52,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:52,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:42:52,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:52,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1647697771, now seen corresponding path program 1 times [2024-05-12 10:42:52,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:52,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982263067] [2024-05-12 10:42:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:52,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:53,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982263067] [2024-05-12 10:42:53,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982263067] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:53,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:53,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:53,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135963122] [2024-05-12 10:42:53,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:53,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:53,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:53,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:53,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-05-12 10:42:53,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:53,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:53,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:53,198 INFO L124 PetriNetUnfolderBase]: 249/511 cut-off events. [2024-05-12 10:42:53,198 INFO L125 PetriNetUnfolderBase]: For 495/495 co-relation queries the response was YES. [2024-05-12 10:42:53,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 511 events. 249/511 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2689 event pairs, 29 based on Foata normal form. 14/518 useless extension candidates. Maximal degree in co-relation 1459. Up to 200 conditions per place. [2024-05-12 10:42:53,201 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 48 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-05-12 10:42:53,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 411 flow [2024-05-12 10:42:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-05-12 10:42:53,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-05-12 10:42:53,203 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 197 flow. Second operand 6 states and 142 transitions. [2024-05-12 10:42:53,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 411 flow [2024-05-12 10:42:53,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 407 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 10:42:53,209 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 231 flow [2024-05-12 10:42:53,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-05-12 10:42:53,211 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 14 predicate places. [2024-05-12 10:42:53,211 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 231 flow [2024-05-12 10:42:53,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-05-12 10:42:53,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:53,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:42:53,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:53,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:53,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1744188116, now seen corresponding path program 1 times [2024-05-12 10:42:53,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:53,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143610029] [2024-05-12 10:42:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:53,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:53,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143610029] [2024-05-12 10:42:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143610029] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:53,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:53,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:42:53,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401413581] [2024-05-12 10:42:53,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:53,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:42:53,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:42:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:42:53,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:53,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-05-12 10:42:53,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:53,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:53,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:53,455 INFO L124 PetriNetUnfolderBase]: 247/496 cut-off events. [2024-05-12 10:42:53,455 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-05-12 10:42:53,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 496 events. 247/496 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2572 event pairs, 45 based on Foata normal form. 1/495 useless extension candidates. Maximal degree in co-relation 1599. Up to 433 conditions per place. [2024-05-12 10:42:53,460 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-05-12 10:42:53,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 361 flow [2024-05-12 10:42:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:42:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:42:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-05-12 10:42:53,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-05-12 10:42:53,464 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 231 flow. Second operand 4 states and 85 transitions. [2024-05-12 10:42:53,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 361 flow [2024-05-12 10:42:53,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 321 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:53,472 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 228 flow [2024-05-12 10:42:53,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-05-12 10:42:53,473 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 14 predicate places. [2024-05-12 10:42:53,473 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 228 flow [2024-05-12 10:42:53,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-05-12 10:42:53,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:53,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:53,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:42:53,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:53,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1793370640, now seen corresponding path program 1 times [2024-05-12 10:42:53,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:53,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105099814] [2024-05-12 10:42:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:53,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:53,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:53,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105099814] [2024-05-12 10:42:53,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105099814] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:53,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:53,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466918087] [2024-05-12 10:42:53,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:53,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:53,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:53,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:53,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:53,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2024-05-12 10:42:53,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:53,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:53,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:53,754 INFO L124 PetriNetUnfolderBase]: 252/512 cut-off events. [2024-05-12 10:42:53,754 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2024-05-12 10:42:53,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1570 conditions, 512 events. 252/512 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2751 event pairs, 37 based on Foata normal form. 3/513 useless extension candidates. Maximal degree in co-relation 1546. Up to 335 conditions per place. [2024-05-12 10:42:53,757 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 44 selfloop transitions, 19 changer transitions 0/73 dead transitions. [2024-05-12 10:42:53,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 440 flow [2024-05-12 10:42:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-05-12 10:42:53,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163265306122448 [2024-05-12 10:42:53,758 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 228 flow. Second operand 7 states and 151 transitions. [2024-05-12 10:42:53,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 440 flow [2024-05-12 10:42:53,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 425 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:53,761 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 277 flow [2024-05-12 10:42:53,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=277, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-05-12 10:42:53,764 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2024-05-12 10:42:53,764 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 277 flow [2024-05-12 10:42:53,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2024-05-12 10:42:53,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:53,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:53,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:42:53,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:53,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1385888213, now seen corresponding path program 1 times [2024-05-12 10:42:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:53,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963241242] [2024-05-12 10:42:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:53,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:53,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963241242] [2024-05-12 10:42:53,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963241242] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:53,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:53,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:53,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188597114] [2024-05-12 10:42:53,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:53,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:53,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:53,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:53,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:53,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:53,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2024-05-12 10:42:53,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:53,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:53,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:54,044 INFO L124 PetriNetUnfolderBase]: 256/534 cut-off events. [2024-05-12 10:42:54,045 INFO L125 PetriNetUnfolderBase]: For 936/936 co-relation queries the response was YES. [2024-05-12 10:42:54,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 534 events. 256/534 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2908 event pairs, 48 based on Foata normal form. 2/532 useless extension candidates. Maximal degree in co-relation 1724. Up to 332 conditions per place. [2024-05-12 10:42:54,047 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 43 selfloop transitions, 19 changer transitions 0/72 dead transitions. [2024-05-12 10:42:54,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 488 flow [2024-05-12 10:42:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-05-12 10:42:54,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-05-12 10:42:54,062 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 277 flow. Second operand 6 states and 133 transitions. [2024-05-12 10:42:54,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 488 flow [2024-05-12 10:42:54,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 454 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:54,065 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 309 flow [2024-05-12 10:42:54,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-05-12 10:42:54,066 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-05-12 10:42:54,066 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 309 flow [2024-05-12 10:42:54,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2024-05-12 10:42:54,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:54,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:54,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:42:54,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:54,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1127551795, now seen corresponding path program 2 times [2024-05-12 10:42:54,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:54,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445730945] [2024-05-12 10:42:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:54,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:54,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445730945] [2024-05-12 10:42:54,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445730945] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:54,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:54,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319230717] [2024-05-12 10:42:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:54,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:54,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:54,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:54,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 309 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2024-05-12 10:42:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:54,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:54,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:54,289 INFO L124 PetriNetUnfolderBase]: 246/494 cut-off events. [2024-05-12 10:42:54,289 INFO L125 PetriNetUnfolderBase]: For 1041/1041 co-relation queries the response was YES. [2024-05-12 10:42:54,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1678 conditions, 494 events. 246/494 cut-off events. For 1041/1041 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2574 event pairs, 37 based on Foata normal form. 2/494 useless extension candidates. Maximal degree in co-relation 1652. Up to 314 conditions per place. [2024-05-12 10:42:54,292 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 44 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2024-05-12 10:42:54,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 74 transitions, 499 flow [2024-05-12 10:42:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-05-12 10:42:54,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-05-12 10:42:54,294 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 309 flow. Second operand 7 states and 150 transitions. [2024-05-12 10:42:54,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 74 transitions, 499 flow [2024-05-12 10:42:54,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 471 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:54,298 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 328 flow [2024-05-12 10:42:54,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=328, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-05-12 10:42:54,299 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 25 predicate places. [2024-05-12 10:42:54,299 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 328 flow [2024-05-12 10:42:54,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2024-05-12 10:42:54,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:54,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:54,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:42:54,300 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1147272657, now seen corresponding path program 1 times [2024-05-12 10:42:54,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:54,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527772256] [2024-05-12 10:42:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:54,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:54,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527772256] [2024-05-12 10:42:54,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527772256] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:54,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:54,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:54,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253738257] [2024-05-12 10:42:54,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:54,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:54,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:54,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:54,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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) [2024-05-12 10:42:54,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:54,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:54,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:54,570 INFO L124 PetriNetUnfolderBase]: 285/584 cut-off events. [2024-05-12 10:42:54,570 INFO L125 PetriNetUnfolderBase]: For 1581/1581 co-relation queries the response was YES. [2024-05-12 10:42:54,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 584 events. 285/584 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3226 event pairs, 49 based on Foata normal form. 12/593 useless extension candidates. Maximal degree in co-relation 1893. Up to 291 conditions per place. [2024-05-12 10:42:54,573 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 49 selfloop transitions, 23 changer transitions 0/82 dead transitions. [2024-05-12 10:42:54,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 562 flow [2024-05-12 10:42:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-05-12 10:42:54,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-05-12 10:42:54,575 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 328 flow. Second operand 8 states and 171 transitions. [2024-05-12 10:42:54,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 562 flow [2024-05-12 10:42:54,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 504 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:54,578 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 332 flow [2024-05-12 10:42:54,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=332, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2024-05-12 10:42:54,579 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 26 predicate places. [2024-05-12 10:42:54,579 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 332 flow [2024-05-12 10:42:54,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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) [2024-05-12 10:42:54,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:54,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:54,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:42:54,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:54,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:54,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1885515671, now seen corresponding path program 1 times [2024-05-12 10:42:54,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:54,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127624083] [2024-05-12 10:42:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:54,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:54,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:54,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127624083] [2024-05-12 10:42:54,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127624083] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:54,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:54,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:54,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143558011] [2024-05-12 10:42:54,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:54,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:54,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:54,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:54,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 10:42:54,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:54,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:54,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:54,813 INFO L124 PetriNetUnfolderBase]: 292/604 cut-off events. [2024-05-12 10:42:54,814 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2024-05-12 10:42:54,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 604 events. 292/604 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3436 event pairs, 61 based on Foata normal form. 1/600 useless extension candidates. Maximal degree in co-relation 1976. Up to 399 conditions per place. [2024-05-12 10:42:54,817 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 45 selfloop transitions, 19 changer transitions 0/74 dead transitions. [2024-05-12 10:42:54,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 536 flow [2024-05-12 10:42:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-05-12 10:42:54,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-05-12 10:42:54,818 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 332 flow. Second operand 6 states and 131 transitions. [2024-05-12 10:42:54,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 536 flow [2024-05-12 10:42:54,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 467 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:54,821 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 322 flow [2024-05-12 10:42:54,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-05-12 10:42:54,822 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 25 predicate places. [2024-05-12 10:42:54,822 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 322 flow [2024-05-12 10:42:54,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 10:42:54,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:54,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:54,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:42:54,823 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:54,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:54,823 INFO L85 PathProgramCache]: Analyzing trace with hash 398730831, now seen corresponding path program 2 times [2024-05-12 10:42:54,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:54,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764249806] [2024-05-12 10:42:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:54,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764249806] [2024-05-12 10:42:54,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764249806] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:54,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:54,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043518520] [2024-05-12 10:42:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:54,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:54,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:54,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:54,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 322 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 10:42:54,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:54,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:54,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:55,028 INFO L124 PetriNetUnfolderBase]: 290/589 cut-off events. [2024-05-12 10:42:55,029 INFO L125 PetriNetUnfolderBase]: For 1280/1280 co-relation queries the response was YES. [2024-05-12 10:42:55,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 589 events. 290/589 cut-off events. For 1280/1280 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3309 event pairs, 51 based on Foata normal form. 1/586 useless extension candidates. Maximal degree in co-relation 1856. Up to 397 conditions per place. [2024-05-12 10:42:55,032 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 46 selfloop transitions, 20 changer transitions 0/76 dead transitions. [2024-05-12 10:42:55,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 502 flow [2024-05-12 10:42:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-05-12 10:42:55,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-05-12 10:42:55,033 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 322 flow. Second operand 6 states and 134 transitions. [2024-05-12 10:42:55,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 502 flow [2024-05-12 10:42:55,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 76 transitions, 466 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:55,037 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 331 flow [2024-05-12 10:42:55,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-05-12 10:42:55,038 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2024-05-12 10:42:55,038 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 331 flow [2024-05-12 10:42:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 10:42:55,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:55,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:42:55,039 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:55,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1796881580, now seen corresponding path program 1 times [2024-05-12 10:42:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863740097] [2024-05-12 10:42:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:55,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:55,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:55,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863740097] [2024-05-12 10:42:55,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863740097] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:55,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:55,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:55,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802082851] [2024-05-12 10:42:55,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:55,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:55,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:55,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:55,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:55,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:42:55,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:55,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:55,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:55,325 INFO L124 PetriNetUnfolderBase]: 342/689 cut-off events. [2024-05-12 10:42:55,325 INFO L125 PetriNetUnfolderBase]: For 2038/2038 co-relation queries the response was YES. [2024-05-12 10:42:55,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2285 conditions, 689 events. 342/689 cut-off events. For 2038/2038 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4016 event pairs, 52 based on Foata normal form. 2/689 useless extension candidates. Maximal degree in co-relation 2257. Up to 264 conditions per place. [2024-05-12 10:42:55,329 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 52 selfloop transitions, 22 changer transitions 0/84 dead transitions. [2024-05-12 10:42:55,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 583 flow [2024-05-12 10:42:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-05-12 10:42:55,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204081632653061 [2024-05-12 10:42:55,330 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 331 flow. Second operand 7 states and 152 transitions. [2024-05-12 10:42:55,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 583 flow [2024-05-12 10:42:55,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 524 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:55,335 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 330 flow [2024-05-12 10:42:55,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-05-12 10:42:55,336 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2024-05-12 10:42:55,336 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 330 flow [2024-05-12 10:42:55,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:42:55,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:55,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:55,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:42:55,337 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:55,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1794024620, now seen corresponding path program 2 times [2024-05-12 10:42:55,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:55,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631031245] [2024-05-12 10:42:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:55,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631031245] [2024-05-12 10:42:55,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631031245] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:55,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:55,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:55,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216057411] [2024-05-12 10:42:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:55,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:55,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:55,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 330 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:42:55,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:55,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:55,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:55,598 INFO L124 PetriNetUnfolderBase]: 339/684 cut-off events. [2024-05-12 10:42:55,598 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2024-05-12 10:42:55,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 684 events. 339/684 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3991 event pairs, 70 based on Foata normal form. 2/684 useless extension candidates. Maximal degree in co-relation 2225. Up to 478 conditions per place. [2024-05-12 10:42:55,602 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 46 selfloop transitions, 22 changer transitions 0/78 dead transitions. [2024-05-12 10:42:55,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 514 flow [2024-05-12 10:42:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-05-12 10:42:55,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081632653061224 [2024-05-12 10:42:55,603 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 330 flow. Second operand 7 states and 149 transitions. [2024-05-12 10:42:55,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 514 flow [2024-05-12 10:42:55,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 471 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:55,609 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 335 flow [2024-05-12 10:42:55,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-05-12 10:42:55,609 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 31 predicate places. [2024-05-12 10:42:55,609 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 335 flow [2024-05-12 10:42:55,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:42:55,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:55,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:55,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:42:55,610 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:55,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 185001388, now seen corresponding path program 1 times [2024-05-12 10:42:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:55,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39628648] [2024-05-12 10:42:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:55,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:55,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39628648] [2024-05-12 10:42:55,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39628648] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:55,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:55,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:55,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334950957] [2024-05-12 10:42:55,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:55,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:55,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:55,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:55,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:42:55,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:55,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:55,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:55,880 INFO L124 PetriNetUnfolderBase]: 336/675 cut-off events. [2024-05-12 10:42:55,880 INFO L125 PetriNetUnfolderBase]: For 2204/2204 co-relation queries the response was YES. [2024-05-12 10:42:55,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 675 events. 336/675 cut-off events. For 2204/2204 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3939 event pairs, 60 based on Foata normal form. 2/675 useless extension candidates. Maximal degree in co-relation 2194. Up to 473 conditions per place. [2024-05-12 10:42:55,883 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 49 selfloop transitions, 23 changer transitions 0/82 dead transitions. [2024-05-12 10:42:55,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 543 flow [2024-05-12 10:42:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-05-12 10:42:55,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-05-12 10:42:55,884 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 335 flow. Second operand 8 states and 167 transitions. [2024-05-12 10:42:55,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 543 flow [2024-05-12 10:42:55,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 486 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:55,889 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 340 flow [2024-05-12 10:42:55,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2024-05-12 10:42:55,889 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 33 predicate places. [2024-05-12 10:42:55,889 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 340 flow [2024-05-12 10:42:55,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:42:55,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:55,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:42:55,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:55,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1506414498, now seen corresponding path program 2 times [2024-05-12 10:42:55,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:55,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539360999] [2024-05-12 10:42:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:56,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539360999] [2024-05-12 10:42:56,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539360999] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:56,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:56,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521152448] [2024-05-12 10:42:56,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:56,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:56,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:56,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:56,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 340 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:42:56,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:56,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:56,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:56,198 INFO L124 PetriNetUnfolderBase]: 333/684 cut-off events. [2024-05-12 10:42:56,198 INFO L125 PetriNetUnfolderBase]: For 2229/2229 co-relation queries the response was YES. [2024-05-12 10:42:56,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2174 conditions, 684 events. 333/684 cut-off events. For 2229/2229 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4037 event pairs, 67 based on Foata normal form. 2/682 useless extension candidates. Maximal degree in co-relation 2143. Up to 269 conditions per place. [2024-05-12 10:42:56,201 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 53 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2024-05-12 10:42:56,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 590 flow [2024-05-12 10:42:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-05-12 10:42:56,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-05-12 10:42:56,205 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 340 flow. Second operand 8 states and 170 transitions. [2024-05-12 10:42:56,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 590 flow [2024-05-12 10:42:56,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 538 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:56,210 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 340 flow [2024-05-12 10:42:56,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-05-12 10:42:56,210 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 35 predicate places. [2024-05-12 10:42:56,211 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 340 flow [2024-05-12 10:42:56,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2024-05-12 10:42:56,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:56,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:56,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:42:56,211 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:56,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1583707929, now seen corresponding path program 1 times [2024-05-12 10:42:56,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:56,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833655506] [2024-05-12 10:42:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:56,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:56,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833655506] [2024-05-12 10:42:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833655506] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:56,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:56,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:42:56,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111901206] [2024-05-12 10:42:56,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:42:56,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:42:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:42:56,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-05-12 10:42:56,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-05-12 10:42:56,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:56,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-05-12 10:42:56,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:56,333 INFO L124 PetriNetUnfolderBase]: 227/654 cut-off events. [2024-05-12 10:42:56,333 INFO L125 PetriNetUnfolderBase]: For 685/688 co-relation queries the response was YES. [2024-05-12 10:42:56,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 654 events. 227/654 cut-off events. For 685/688 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4324 event pairs, 24 based on Foata normal form. 38/651 useless extension candidates. Maximal degree in co-relation 1505. Up to 229 conditions per place. [2024-05-12 10:42:56,336 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 22 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-05-12 10:42:56,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 432 flow [2024-05-12 10:42:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:42:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:42:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-05-12 10:42:56,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-05-12 10:42:56,337 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 340 flow. Second operand 4 states and 100 transitions. [2024-05-12 10:42:56,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 432 flow [2024-05-12 10:42:56,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 365 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:56,342 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 327 flow [2024-05-12 10:42:56,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2024-05-12 10:42:56,343 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 33 predicate places. [2024-05-12 10:42:56,343 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 327 flow [2024-05-12 10:42:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-05-12 10:42:56,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:56,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:56,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:42:56,344 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:56,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash 133120620, now seen corresponding path program 1 times [2024-05-12 10:42:56,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:56,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109646762] [2024-05-12 10:42:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:56,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:56,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109646762] [2024-05-12 10:42:56,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109646762] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:56,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:56,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:56,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918061881] [2024-05-12 10:42:56,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:56,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:56,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:56,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:56,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:56,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:56,618 INFO L124 PetriNetUnfolderBase]: 295/688 cut-off events. [2024-05-12 10:42:56,618 INFO L125 PetriNetUnfolderBase]: For 2156/2156 co-relation queries the response was YES. [2024-05-12 10:42:56,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 688 events. 295/688 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4199 event pairs, 108 based on Foata normal form. 6/650 useless extension candidates. Maximal degree in co-relation 1967. Up to 296 conditions per place. [2024-05-12 10:42:56,622 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 46 selfloop transitions, 24 changer transitions 0/81 dead transitions. [2024-05-12 10:42:56,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 81 transitions, 531 flow [2024-05-12 10:42:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-05-12 10:42:56,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-05-12 10:42:56,623 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 327 flow. Second operand 8 states and 162 transitions. [2024-05-12 10:42:56,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 81 transitions, 531 flow [2024-05-12 10:42:56,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:56,628 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 365 flow [2024-05-12 10:42:56,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=365, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2024-05-12 10:42:56,629 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 39 predicate places. [2024-05-12 10:42:56,629 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 365 flow [2024-05-12 10:42:56,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:56,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:56,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:56,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:42:56,630 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:56,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash -488504490, now seen corresponding path program 2 times [2024-05-12 10:42:56,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:56,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281148727] [2024-05-12 10:42:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:56,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:56,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:56,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281148727] [2024-05-12 10:42:56,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281148727] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:56,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:56,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:56,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425100735] [2024-05-12 10:42:56,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:56,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:56,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:56,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:56,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:56,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:56,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 365 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:56,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:56,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:56,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:56,871 INFO L124 PetriNetUnfolderBase]: 318/767 cut-off events. [2024-05-12 10:42:56,872 INFO L125 PetriNetUnfolderBase]: For 2504/2504 co-relation queries the response was YES. [2024-05-12 10:42:56,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 767 events. 318/767 cut-off events. For 2504/2504 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4930 event pairs, 141 based on Foata normal form. 6/723 useless extension candidates. Maximal degree in co-relation 2228. Up to 484 conditions per place. [2024-05-12 10:42:56,875 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 49 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-05-12 10:42:56,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 545 flow [2024-05-12 10:42:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-05-12 10:42:56,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673469387755102 [2024-05-12 10:42:56,876 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 365 flow. Second operand 7 states and 139 transitions. [2024-05-12 10:42:56,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 545 flow [2024-05-12 10:42:56,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 498 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:56,881 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 353 flow [2024-05-12 10:42:56,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=353, PETRI_PLACES=77, PETRI_TRANSITIONS=58} [2024-05-12 10:42:56,881 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2024-05-12 10:42:56,881 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 353 flow [2024-05-12 10:42:56,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:56,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:56,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:56,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:42:56,882 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:56,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:56,882 INFO L85 PathProgramCache]: Analyzing trace with hash -501128596, now seen corresponding path program 3 times [2024-05-12 10:42:56,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:56,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017480922] [2024-05-12 10:42:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:56,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:57,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017480922] [2024-05-12 10:42:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017480922] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:57,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:57,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:57,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514855899] [2024-05-12 10:42:57,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:57,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:57,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:57,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:57,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:57,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:57,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:57,155 INFO L124 PetriNetUnfolderBase]: 371/878 cut-off events. [2024-05-12 10:42:57,155 INFO L125 PetriNetUnfolderBase]: For 3681/3681 co-relation queries the response was YES. [2024-05-12 10:42:57,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627 conditions, 878 events. 371/878 cut-off events. For 3681/3681 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5959 event pairs, 157 based on Foata normal form. 6/830 useless extension candidates. Maximal degree in co-relation 2592. Up to 401 conditions per place. [2024-05-12 10:42:57,159 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 52 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-05-12 10:42:57,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 605 flow [2024-05-12 10:42:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-05-12 10:42:57,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163265306122448 [2024-05-12 10:42:57,160 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 353 flow. Second operand 7 states and 151 transitions. [2024-05-12 10:42:57,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 605 flow [2024-05-12 10:42:57,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 84 transitions, 574 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:57,166 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 367 flow [2024-05-12 10:42:57,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=367, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2024-05-12 10:42:57,167 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2024-05-12 10:42:57,167 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 367 flow [2024-05-12 10:42:57,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:57,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:57,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:57,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:42:57,167 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:57,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:57,167 INFO L85 PathProgramCache]: Analyzing trace with hash 933622362, now seen corresponding path program 4 times [2024-05-12 10:42:57,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:57,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553227363] [2024-05-12 10:42:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:57,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:57,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553227363] [2024-05-12 10:42:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553227363] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:57,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:57,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:57,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148606718] [2024-05-12 10:42:57,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:57,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:57,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:57,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:57,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 367 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:57,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:57,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:57,403 INFO L124 PetriNetUnfolderBase]: 405/962 cut-off events. [2024-05-12 10:42:57,403 INFO L125 PetriNetUnfolderBase]: For 4413/4413 co-relation queries the response was YES. [2024-05-12 10:42:57,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 962 events. 405/962 cut-off events. For 4413/4413 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6741 event pairs, 242 based on Foata normal form. 8/907 useless extension candidates. Maximal degree in co-relation 2827. Up to 682 conditions per place. [2024-05-12 10:42:57,408 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 45 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2024-05-12 10:42:57,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 541 flow [2024-05-12 10:42:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-05-12 10:42:57,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795918367346938 [2024-05-12 10:42:57,409 INFO L175 Difference]: Start difference. First operand has 79 places, 58 transitions, 367 flow. Second operand 7 states and 142 transitions. [2024-05-12 10:42:57,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 541 flow [2024-05-12 10:42:57,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 75 transitions, 500 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:57,415 INFO L231 Difference]: Finished difference. Result has 81 places, 58 transitions, 368 flow [2024-05-12 10:42:57,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=368, PETRI_PLACES=81, PETRI_TRANSITIONS=58} [2024-05-12 10:42:57,415 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2024-05-12 10:42:57,415 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 58 transitions, 368 flow [2024-05-12 10:42:57,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:57,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:57,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:42:57,416 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:57,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 928259982, now seen corresponding path program 5 times [2024-05-12 10:42:57,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:57,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048681106] [2024-05-12 10:42:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:57,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:57,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:57,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048681106] [2024-05-12 10:42:57,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048681106] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:57,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:57,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:57,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025663165] [2024-05-12 10:42:57,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:57,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:57,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:57,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:57,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:57,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:57,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 58 transitions, 368 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:57,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:57,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:57,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:57,666 INFO L124 PetriNetUnfolderBase]: 395/944 cut-off events. [2024-05-12 10:42:57,666 INFO L125 PetriNetUnfolderBase]: For 3305/3305 co-relation queries the response was YES. [2024-05-12 10:42:57,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 944 events. 395/944 cut-off events. For 3305/3305 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6617 event pairs, 234 based on Foata normal form. 8/889 useless extension candidates. Maximal degree in co-relation 2636. Up to 664 conditions per place. [2024-05-12 10:42:57,670 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 47 selfloop transitions, 20 changer transitions 0/78 dead transitions. [2024-05-12 10:42:57,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 556 flow [2024-05-12 10:42:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-05-12 10:42:57,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-05-12 10:42:57,672 INFO L175 Difference]: Start difference. First operand has 81 places, 58 transitions, 368 flow. Second operand 7 states and 146 transitions. [2024-05-12 10:42:57,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 556 flow [2024-05-12 10:42:57,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 520 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:57,677 INFO L231 Difference]: Finished difference. Result has 83 places, 58 transitions, 376 flow [2024-05-12 10:42:57,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=376, PETRI_PLACES=83, PETRI_TRANSITIONS=58} [2024-05-12 10:42:57,678 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 46 predicate places. [2024-05-12 10:42:57,678 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 58 transitions, 376 flow [2024-05-12 10:42:57,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:57,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:57,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:57,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:42:57,679 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:57,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash 933837564, now seen corresponding path program 1 times [2024-05-12 10:42:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:57,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064154419] [2024-05-12 10:42:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:57,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:57,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:57,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064154419] [2024-05-12 10:42:57,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064154419] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:57,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:57,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:57,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703711086] [2024-05-12 10:42:57,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:57,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:57,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:57,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 58 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:57,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:57,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:57,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:57,916 INFO L124 PetriNetUnfolderBase]: 418/1015 cut-off events. [2024-05-12 10:42:57,916 INFO L125 PetriNetUnfolderBase]: For 3207/3207 co-relation queries the response was YES. [2024-05-12 10:42:57,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1015 events. 418/1015 cut-off events. For 3207/3207 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7317 event pairs, 225 based on Foata normal form. 6/959 useless extension candidates. Maximal degree in co-relation 2799. Up to 466 conditions per place. [2024-05-12 10:42:57,921 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 49 selfloop transitions, 20 changer transitions 0/80 dead transitions. [2024-05-12 10:42:57,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 80 transitions, 576 flow [2024-05-12 10:42:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-05-12 10:42:57,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-05-12 10:42:57,923 INFO L175 Difference]: Start difference. First operand has 83 places, 58 transitions, 376 flow. Second operand 7 states and 146 transitions. [2024-05-12 10:42:57,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 80 transitions, 576 flow [2024-05-12 10:42:57,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 80 transitions, 538 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:57,929 INFO L231 Difference]: Finished difference. Result has 85 places, 58 transitions, 381 flow [2024-05-12 10:42:57,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=85, PETRI_TRANSITIONS=58} [2024-05-12 10:42:57,930 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2024-05-12 10:42:57,930 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 58 transitions, 381 flow [2024-05-12 10:42:57,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:57,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:57,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:57,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:42:57,931 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:57,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1440076348, now seen corresponding path program 2 times [2024-05-12 10:42:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:57,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205304913] [2024-05-12 10:42:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:57,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205304913] [2024-05-12 10:42:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205304913] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:58,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967903779] [2024-05-12 10:42:58,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:58,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:58,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:58,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 58 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:58,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:58,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:58,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:58,205 INFO L124 PetriNetUnfolderBase]: 441/1070 cut-off events. [2024-05-12 10:42:58,205 INFO L125 PetriNetUnfolderBase]: For 3547/3547 co-relation queries the response was YES. [2024-05-12 10:42:58,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 1070 events. 441/1070 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7840 event pairs, 180 based on Foata normal form. 6/1016 useless extension candidates. Maximal degree in co-relation 2954. Up to 618 conditions per place. [2024-05-12 10:42:58,211 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 47 selfloop transitions, 22 changer transitions 0/80 dead transitions. [2024-05-12 10:42:58,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 80 transitions, 581 flow [2024-05-12 10:42:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-05-12 10:42:58,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-05-12 10:42:58,212 INFO L175 Difference]: Start difference. First operand has 85 places, 58 transitions, 381 flow. Second operand 7 states and 146 transitions. [2024-05-12 10:42:58,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 80 transitions, 581 flow [2024-05-12 10:42:58,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 542 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:58,219 INFO L231 Difference]: Finished difference. Result has 87 places, 58 transitions, 389 flow [2024-05-12 10:42:58,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=389, PETRI_PLACES=87, PETRI_TRANSITIONS=58} [2024-05-12 10:42:58,219 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 50 predicate places. [2024-05-12 10:42:58,219 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 58 transitions, 389 flow [2024-05-12 10:42:58,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:58,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:58,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:58,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:42:58,220 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:58,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:58,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1705773628, now seen corresponding path program 3 times [2024-05-12 10:42:58,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:58,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486543183] [2024-05-12 10:42:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:58,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:58,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486543183] [2024-05-12 10:42:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486543183] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:58,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:58,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:58,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222631295] [2024-05-12 10:42:58,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:58,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:58,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:58,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 10:42:58,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 58 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:58,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:58,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 10:42:58,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:58,458 INFO L124 PetriNetUnfolderBase]: 434/1057 cut-off events. [2024-05-12 10:42:58,458 INFO L125 PetriNetUnfolderBase]: For 2379/2379 co-relation queries the response was YES. [2024-05-12 10:42:58,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 1057 events. 434/1057 cut-off events. For 2379/2379 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7781 event pairs, 245 based on Foata normal form. 6/999 useless extension candidates. Maximal degree in co-relation 2830. Up to 752 conditions per place. [2024-05-12 10:42:58,463 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 48 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-05-12 10:42:58,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 75 transitions, 521 flow [2024-05-12 10:42:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-05-12 10:42:58,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563265306122449 [2024-05-12 10:42:58,464 INFO L175 Difference]: Start difference. First operand has 87 places, 58 transitions, 389 flow. Second operand 7 states and 138 transitions. [2024-05-12 10:42:58,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 75 transitions, 521 flow [2024-05-12 10:42:58,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 414 flow, removed 0 selfloop flow, removed 27 redundant places. [2024-05-12 10:42:58,467 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 268 flow [2024-05-12 10:42:58,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-05-12 10:42:58,467 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2024-05-12 10:42:58,467 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 268 flow [2024-05-12 10:42:58,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2024-05-12 10:42:58,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:58,468 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, 1] [2024-05-12 10:42:58,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:42:58,468 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:58,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1888249911, now seen corresponding path program 1 times [2024-05-12 10:42:58,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:58,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744699294] [2024-05-12 10:42:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:58,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:58,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:58,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744699294] [2024-05-12 10:42:58,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744699294] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:58,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:58,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131530159] [2024-05-12 10:42:58,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:58,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:58,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:58,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:58,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-05-12 10:42:58,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-05-12 10:42:58,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:58,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-05-12 10:42:58,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:58,648 INFO L124 PetriNetUnfolderBase]: 322/956 cut-off events. [2024-05-12 10:42:58,649 INFO L125 PetriNetUnfolderBase]: For 532/571 co-relation queries the response was YES. [2024-05-12 10:42:58,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2231 conditions, 956 events. 322/956 cut-off events. For 532/571 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6875 event pairs, 14 based on Foata normal form. 68/970 useless extension candidates. Maximal degree in co-relation 2213. Up to 312 conditions per place. [2024-05-12 10:42:58,652 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 14 changer transitions 1/67 dead transitions. [2024-05-12 10:42:58,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 364 flow [2024-05-12 10:42:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-05-12 10:42:58,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-05-12 10:42:58,653 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 268 flow. Second operand 5 states and 120 transitions. [2024-05-12 10:42:58,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 364 flow [2024-05-12 10:42:58,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 333 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:58,655 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 284 flow [2024-05-12 10:42:58,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-05-12 10:42:58,655 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2024-05-12 10:42:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 284 flow [2024-05-12 10:42:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-05-12 10:42:58,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:58,656 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, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:58,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:42:58,656 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:42:58,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash 355458673, now seen corresponding path program 1 times [2024-05-12 10:42:58,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:58,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661038422] [2024-05-12 10:42:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:58,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:58,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:58,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661038422] [2024-05-12 10:42:58,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661038422] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:58,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:58,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:58,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355136586] [2024-05-12 10:42:58,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:58,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:58,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:58,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:58,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2024-05-12 10:42:58,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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) [2024-05-12 10:42:58,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:58,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2024-05-12 10:42:58,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:58,838 INFO L124 PetriNetUnfolderBase]: 262/762 cut-off events. [2024-05-12 10:42:58,839 INFO L125 PetriNetUnfolderBase]: For 529/530 co-relation queries the response was YES. [2024-05-12 10:42:58,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1984 conditions, 762 events. 262/762 cut-off events. For 529/530 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5256 event pairs, 140 based on Foata normal form. 41/732 useless extension candidates. Maximal degree in co-relation 1964. Up to 352 conditions per place. [2024-05-12 10:42:58,841 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2024-05-12 10:42:58,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 65 transitions, 392 flow [2024-05-12 10:42:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-05-12 10:42:58,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114285714285714 [2024-05-12 10:42:58,842 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 284 flow. Second operand 5 states and 107 transitions. [2024-05-12 10:42:58,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 65 transitions, 392 flow [2024-05-12 10:42:58,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 334 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:58,844 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2024-05-12 10:42:58,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2024-05-12 10:42:58,845 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 25 predicate places. [2024-05-12 10:42:58,845 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2024-05-12 10:42:58,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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) [2024-05-12 10:42:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-05-12 10:42:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-05-12 10:42:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-05-12 10:42:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-05-12 10:42:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-05-12 10:42:58,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:42:58,849 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:58,851 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-05-12 10:42:58,851 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-05-12 10:42:58,854 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-05-12 10:42:58,854 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-05-12 10:42:58,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.05 10:42:58 BasicIcfg [2024-05-12 10:42:58,855 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-05-12 10:42:58,855 INFO L158 Benchmark]: Toolchain (without parser) took 8081.84ms. Allocated memory was 163.6MB in the beginning and 425.7MB in the end (delta: 262.1MB). Free memory was 89.9MB in the beginning and 264.7MB in the end (delta: -174.8MB). Peak memory consumption was 88.9MB. Max. memory is 16.1GB. [2024-05-12 10:42:58,855 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 111.1MB. Free memory is still 71.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 10:42:58,857 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 163.6MB. Free memory is still 137.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 10:42:58,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 476.49ms. Allocated memory is still 163.6MB. Free memory was 89.7MB in the beginning and 127.3MB in the end (delta: -37.6MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2024-05-12 10:42:58,857 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.48ms. Allocated memory is still 163.6MB. Free memory was 127.3MB in the beginning and 124.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 10:42:58,857 INFO L158 Benchmark]: Boogie Preprocessor took 30.26ms. Allocated memory is still 163.6MB. Free memory was 124.6MB in the beginning and 122.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 10:42:58,858 INFO L158 Benchmark]: RCFGBuilder took 332.22ms. Allocated memory is still 163.6MB. Free memory was 122.5MB in the beginning and 98.5MB in the end (delta: 23.9MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-05-12 10:42:58,858 INFO L158 Benchmark]: TraceAbstraction took 7209.63ms. Allocated memory was 163.6MB in the beginning and 425.7MB in the end (delta: 262.1MB). Free memory was 97.3MB in the beginning and 264.7MB in the end (delta: -167.4MB). Peak memory consumption was 97.0MB. Max. memory is 16.1GB. [2024-05-12 10:42:58,859 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 0.15ms. Allocated memory is still 111.1MB. Free memory is still 71.7MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 163.6MB. Free memory is still 137.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 476.49ms. Allocated memory is still 163.6MB. Free memory was 89.7MB in the beginning and 127.3MB in the end (delta: -37.6MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.48ms. Allocated memory is still 163.6MB. Free memory was 127.3MB in the beginning and 124.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.26ms. Allocated memory is still 163.6MB. Free memory was 124.6MB in the beginning and 122.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 332.22ms. Allocated memory is still 163.6MB. Free memory was 122.5MB in the beginning and 98.5MB in the end (delta: 23.9MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 7209.63ms. Allocated memory was 163.6MB in the beginning and 425.7MB in the end (delta: 262.1MB). Free memory was 97.3MB in the beginning and 264.7MB in the end (delta: -167.4MB). Peak memory consumption was 97.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 759]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 760]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: 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, 51 locations, 5 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: 7.1s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1284 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 996 mSDsluCounter, 470 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 324 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3562 IncrementalHoareTripleChecker+Invalid, 3660 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 146 mSDtfsCounter, 3562 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=389occurred in iteration=23, InterpolantAutomatonStates: 163, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 390 NumberOfCodeBlocks, 390 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 364 ConstructedInterpolants, 0 QuantifiedInterpolants, 2014 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-05-12 10:42:58,881 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