./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix046.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix046.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix046.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix046.opt.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:32:50,903 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:32:50,976 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:32:50,982 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:32:50,982 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:32:51,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:32:51,021 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:32:51,022 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:32:51,022 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:32:51,023 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:32:51,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:32:51,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:32:51,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:32:51,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:32:51,025 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:32:51,025 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:32:51,026 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:32:51,026 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:32:51,026 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:32:51,027 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:32:51,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:32:51,032 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:32:51,032 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:32:51,033 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:32:51,033 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:32:51,033 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:32:51,033 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:32:51,034 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:32:51,034 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:32:51,035 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:32:51,035 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:32:51,036 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:32:51,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:32:51,036 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:32:51,037 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:32:51,037 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:32:51,037 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:32:51,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:32:51,037 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:32:51,038 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:32:51,038 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:32:51,038 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:32:51,038 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:32:51,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:32:51,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:32:51,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:32:51,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:32:51,335 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:32:51,336 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:32:51,337 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix046.opt.yml/witness.yml [2024-06-27 20:32:51,580 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:32:51,580 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:32:51,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix046.opt.i [2024-06-27 20:32:52,681 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:32:52,944 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:32:52,945 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix046.opt.i [2024-06-27 20:32:52,974 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17862532b/1e758f3040cc42c586c4bdee09f3b9a4/FLAGe0a5de8f7 [2024-06-27 20:32:52,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17862532b/1e758f3040cc42c586c4bdee09f3b9a4 [2024-06-27 20:32:52,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:32:52,996 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:32:52,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:32:52,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:32:53,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:32:53,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:32:51" (1/2) ... [2024-06-27 20:32:53,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10395cbc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:32:53, skipping insertion in model container [2024-06-27 20:32:53,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:32:51" (1/2) ... [2024-06-27 20:32:53,006 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61d5eb5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:32:53, skipping insertion in model container [2024-06-27 20:32:53,007 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:32:52" (2/2) ... [2024-06-27 20:32:53,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10395cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53, skipping insertion in model container [2024-06-27 20:32:53,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:32:52" (2/2) ... [2024-06-27 20:32:53,007 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:32:53,164 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:32:53,165 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-27 20:32:53,165 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-27 20:32:53,166 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-27 20:32:53,166 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-27 20:32:53,166 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:32:53,166 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-27 20:32:53,212 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:32:53,596 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:32:53,609 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:32:53,741 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:32:53,783 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:32:53,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53 WrapperNode [2024-06-27 20:32:53,784 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:32:53,786 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:32:53,786 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:32:53,786 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:32:53,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,856 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 164 [2024-06-27 20:32:53,856 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:32:53,863 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:32:53,863 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:32:53,863 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:32:53,872 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,907 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:32:53,907 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,917 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,919 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,921 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,923 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,926 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:32:53,927 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:32:53,927 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:32:53,927 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:32:53,928 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (1/1) ... [2024-06-27 20:32:53,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:32:53,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:32:53,977 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) [2024-06-27 20:32:53,989 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 [2024-06-27 20:32:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:32:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:32:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:32:54,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:32:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:32:54,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:32:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:32:54,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:32:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:32:54,029 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:32:54,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:32:54,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:32:54,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:32:54,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:32:54,031 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:32:54,144 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:32:54,146 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:32:54,541 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:32:54,542 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:32:54,816 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:32:54,817 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:32:54,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:32:54 BoogieIcfgContainer [2024-06-27 20:32:54,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:32:54,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:32:54,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:32:54,825 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:32:54,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:32:51" (1/4) ... [2024-06-27 20:32:54,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52131996 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:32:54, skipping insertion in model container [2024-06-27 20:32:54,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:32:52" (2/4) ... [2024-06-27 20:32:54,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52131996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:32:54, skipping insertion in model container [2024-06-27 20:32:54,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:53" (3/4) ... [2024-06-27 20:32:54,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52131996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:32:54, skipping insertion in model container [2024-06-27 20:32:54,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:32:54" (4/4) ... [2024-06-27 20:32:54,828 INFO L112 eAbstractionObserver]: Analyzing ICFG mix046.opt.i [2024-06-27 20:32:54,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:32:54,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:32:54,845 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:32:54,907 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:32:54,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:32:54,981 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-27 20:32:54,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:32:54,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:32:54,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:32:54,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-27 20:32:55,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:32:55,009 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;@4f57283d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:32:55,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:32:55,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:32:55,017 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:32:55,017 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:32:55,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:55,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:32:55,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:32:55,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:55,024 INFO L85 PathProgramCache]: Analyzing trace with hash 385622724, now seen corresponding path program 1 times [2024-06-27 20:32:55,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:55,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341717831] [2024-06-27 20:32:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:55,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:56,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:56,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341717831] [2024-06-27 20:32:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341717831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:56,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:56,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:32:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138597200] [2024-06-27 20:32:56,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:56,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:32:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:32:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:32:56,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-27 20:32:56,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-06-27 20:32:56,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:56,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-27 20:32:56,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:57,797 INFO L124 PetriNetUnfolderBase]: 7499/10683 cut-off events. [2024-06-27 20:32:57,798 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2024-06-27 20:32:57,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21211 conditions, 10683 events. 7499/10683 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 61346 event pairs, 5548 based on Foata normal form. 1/10364 useless extension candidates. Maximal degree in co-relation 21198. Up to 10221 conditions per place. [2024-06-27 20:32:57,888 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 20:32:57,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-27 20:32:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:32:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:32:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-27 20:32:57,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-06-27 20:32:57,903 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 99 transitions. [2024-06-27 20:32:57,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-27 20:32:57,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:57,911 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-27 20:32:57,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 20:32:57,919 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-27 20:32:57,919 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-27 20:32:57,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-06-27 20:32:57,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:57,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:57,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:32:57,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:32:57,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1216270883, now seen corresponding path program 1 times [2024-06-27 20:32:57,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:57,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650621737] [2024-06-27 20:32:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:58,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650621737] [2024-06-27 20:32:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650621737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:58,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:32:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070867997] [2024-06-27 20:32:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:32:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:32:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:32:58,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:32:58,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2024-06-27 20:32:58,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:58,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:32:58,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:00,213 INFO L124 PetriNetUnfolderBase]: 8587/11937 cut-off events. [2024-06-27 20:33:00,213 INFO L125 PetriNetUnfolderBase]: For 2357/2357 co-relation queries the response was YES. [2024-06-27 20:33:00,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27144 conditions, 11937 events. 8587/11937 cut-off events. For 2357/2357 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 66959 event pairs, 5485 based on Foata normal form. 4/11795 useless extension candidates. Maximal degree in co-relation 27132. Up to 11644 conditions per place. [2024-06-27 20:33:00,300 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 20:33:00,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 323 flow [2024-06-27 20:33:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:33:00,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:33:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 20:33:00,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943396226415094 [2024-06-27 20:33:00,303 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 126 transitions. [2024-06-27 20:33:00,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 323 flow [2024-06-27 20:33:00,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:33:00,306 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-27 20:33:00,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-27 20:33:00,307 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-27 20:33:00,307 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-27 20:33:00,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2024-06-27 20:33:00,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:00,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:00,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:33:00,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:00,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1582466492, now seen corresponding path program 1 times [2024-06-27 20:33:00,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:00,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723645317] [2024-06-27 20:33:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:01,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:01,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723645317] [2024-06-27 20:33:01,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723645317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:01,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:01,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:33:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27296250] [2024-06-27 20:33:01,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:01,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:33:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:33:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:33:01,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:33:01,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 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) [2024-06-27 20:33:01,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:01,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:33:01,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:03,245 INFO L124 PetriNetUnfolderBase]: 10906/15063 cut-off events. [2024-06-27 20:33:03,246 INFO L125 PetriNetUnfolderBase]: For 7999/7999 co-relation queries the response was YES. [2024-06-27 20:33:03,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37831 conditions, 15063 events. 10906/15063 cut-off events. For 7999/7999 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 82482 event pairs, 5494 based on Foata normal form. 8/14887 useless extension candidates. Maximal degree in co-relation 37817. Up to 14662 conditions per place. [2024-06-27 20:33:03,328 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 71 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-27 20:33:03,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 488 flow [2024-06-27 20:33:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 20:33:03,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550314465408805 [2024-06-27 20:33:03,335 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 175 transitions. [2024-06-27 20:33:03,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 488 flow [2024-06-27 20:33:03,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 460 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 20:33:03,342 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-27 20:33:03,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-27 20:33:03,344 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-27 20:33:03,344 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-27 20:33:03,344 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) [2024-06-27 20:33:03,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:03,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:03,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:33:03,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:03,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1409866147, now seen corresponding path program 1 times [2024-06-27 20:33:03,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:03,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623720042] [2024-06-27 20:33:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:03,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:04,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623720042] [2024-06-27 20:33:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623720042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:04,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:04,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:33:04,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277603046] [2024-06-27 20:33:04,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:04,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:33:04,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:33:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:33:04,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:33:04,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 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) [2024-06-27 20:33:04,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:04,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:33:04,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:05,964 INFO L124 PetriNetUnfolderBase]: 9502/13456 cut-off events. [2024-06-27 20:33:05,964 INFO L125 PetriNetUnfolderBase]: For 13319/13319 co-relation queries the response was YES. [2024-06-27 20:33:06,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36921 conditions, 13456 events. 9502/13456 cut-off events. For 13319/13319 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 76174 event pairs, 5228 based on Foata normal form. 3/13255 useless extension candidates. Maximal degree in co-relation 36904. Up to 12874 conditions per place. [2024-06-27 20:33:06,071 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 60 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-27 20:33:06,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 449 flow [2024-06-27 20:33:06,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:33:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:33:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 20:33:06,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-27 20:33:06,073 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 127 transitions. [2024-06-27 20:33:06,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 449 flow [2024-06-27 20:33:06,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 411 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:06,083 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-27 20:33:06,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 20:33:06,084 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-27 20:33:06,085 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-27 20:33:06,085 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) [2024-06-27 20:33:06,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:06,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:06,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:33:06,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:06,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:06,086 INFO L85 PathProgramCache]: Analyzing trace with hash 733836227, now seen corresponding path program 1 times [2024-06-27 20:33:06,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:06,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542225778] [2024-06-27 20:33:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:06,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:07,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:07,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542225778] [2024-06-27 20:33:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542225778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:07,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:07,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:33:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404264130] [2024-06-27 20:33:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:33:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:33:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:33:07,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:33:07,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 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) [2024-06-27 20:33:07,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:07,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:33:07,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:09,066 INFO L124 PetriNetUnfolderBase]: 9514/13574 cut-off events. [2024-06-27 20:33:09,067 INFO L125 PetriNetUnfolderBase]: For 20419/20419 co-relation queries the response was YES. [2024-06-27 20:33:09,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40305 conditions, 13574 events. 9514/13574 cut-off events. For 20419/20419 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 77698 event pairs, 5008 based on Foata normal form. 5/13421 useless extension candidates. Maximal degree in co-relation 40286. Up to 12824 conditions per place. [2024-06-27 20:33:09,164 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-27 20:33:09,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 103 transitions, 638 flow [2024-06-27 20:33:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 20:33:09,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:33:09,166 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 159 transitions. [2024-06-27 20:33:09,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 103 transitions, 638 flow [2024-06-27 20:33:09,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 103 transitions, 609 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:09,173 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 407 flow [2024-06-27 20:33:09,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-27 20:33:09,174 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-27 20:33:09,174 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 407 flow [2024-06-27 20:33:09,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 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) [2024-06-27 20:33:09,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:09,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:09,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:33:09,175 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:09,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:09,176 INFO L85 PathProgramCache]: Analyzing trace with hash -918618588, now seen corresponding path program 1 times [2024-06-27 20:33:09,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:09,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222329988] [2024-06-27 20:33:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:09,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:10,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:10,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222329988] [2024-06-27 20:33:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222329988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:10,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:10,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:33:10,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118381309] [2024-06-27 20:33:10,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:10,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:33:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:33:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:33:10,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:10,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2024-06-27 20:33:10,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:10,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:10,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:11,965 INFO L124 PetriNetUnfolderBase]: 10931/15156 cut-off events. [2024-06-27 20:33:11,965 INFO L125 PetriNetUnfolderBase]: For 38889/38901 co-relation queries the response was YES. [2024-06-27 20:33:11,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51426 conditions, 15156 events. 10931/15156 cut-off events. For 38889/38901 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 83457 event pairs, 5714 based on Foata normal form. 11/15013 useless extension candidates. Maximal degree in co-relation 51404. Up to 14711 conditions per place. [2024-06-27 20:33:12,050 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 85 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-27 20:33:12,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 793 flow [2024-06-27 20:33:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 20:33:12,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-27 20:33:12,053 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 407 flow. Second operand 6 states and 154 transitions. [2024-06-27 20:33:12,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 793 flow [2024-06-27 20:33:12,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 771 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 20:33:12,065 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 514 flow [2024-06-27 20:33:12,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-27 20:33:12,068 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-27 20:33:12,069 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 514 flow [2024-06-27 20:33:12,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2024-06-27 20:33:12,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:12,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:12,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:33:12,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:12,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1989958262, now seen corresponding path program 2 times [2024-06-27 20:33:12,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:12,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317662399] [2024-06-27 20:33:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:12,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:12,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:12,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317662399] [2024-06-27 20:33:12,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317662399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:12,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:12,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:33:12,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580494633] [2024-06-27 20:33:12,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:12,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:33:12,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:33:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:33:12,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:12,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2024-06-27 20:33:12,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:12,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:12,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:14,416 INFO L124 PetriNetUnfolderBase]: 10922/15145 cut-off events. [2024-06-27 20:33:14,416 INFO L125 PetriNetUnfolderBase]: For 52618/52627 co-relation queries the response was YES. [2024-06-27 20:33:14,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55109 conditions, 15145 events. 10922/15145 cut-off events. For 52618/52627 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 83318 event pairs, 5717 based on Foata normal form. 9/14999 useless extension candidates. Maximal degree in co-relation 55084. Up to 14702 conditions per place. [2024-06-27 20:33:14,547 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 79 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-27 20:33:14,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 776 flow [2024-06-27 20:33:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 20:33:14,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-27 20:33:14,549 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 514 flow. Second operand 6 states and 148 transitions. [2024-06-27 20:33:14,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 776 flow [2024-06-27 20:33:14,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 718 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 20:33:14,590 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 509 flow [2024-06-27 20:33:14,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-27 20:33:14,592 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-27 20:33:14,592 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 509 flow [2024-06-27 20:33:14,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2024-06-27 20:33:14,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:14,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:14,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:33:14,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:14,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:14,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1887080680, now seen corresponding path program 1 times [2024-06-27 20:33:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:14,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121641210] [2024-06-27 20:33:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:15,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:15,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121641210] [2024-06-27 20:33:15,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121641210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:15,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:15,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:15,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974735601] [2024-06-27 20:33:15,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:15,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:15,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:15,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 509 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:15,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:15,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:15,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:17,079 INFO L124 PetriNetUnfolderBase]: 11013/15283 cut-off events. [2024-06-27 20:33:17,079 INFO L125 PetriNetUnfolderBase]: For 59232/59236 co-relation queries the response was YES. [2024-06-27 20:33:17,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56116 conditions, 15283 events. 11013/15283 cut-off events. For 59232/59236 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 83985 event pairs, 5707 based on Foata normal form. 7/15138 useless extension candidates. Maximal degree in co-relation 56089. Up to 14804 conditions per place. [2024-06-27 20:33:17,211 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 103 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-06-27 20:33:17,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 142 transitions, 1006 flow [2024-06-27 20:33:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 20:33:17,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-27 20:33:17,213 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 509 flow. Second operand 8 states and 199 transitions. [2024-06-27 20:33:17,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 142 transitions, 1006 flow [2024-06-27 20:33:17,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 142 transitions, 932 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:17,259 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 667 flow [2024-06-27 20:33:17,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-27 20:33:17,260 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-27 20:33:17,260 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 667 flow [2024-06-27 20:33:17,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:17,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:17,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:17,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:33:17,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:17,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash 664541032, now seen corresponding path program 2 times [2024-06-27 20:33:17,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:17,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016123239] [2024-06-27 20:33:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:17,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:18,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016123239] [2024-06-27 20:33:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016123239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433035242] [2024-06-27 20:33:18,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:18,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:18,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 667 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:18,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:18,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:18,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:20,127 INFO L124 PetriNetUnfolderBase]: 11035/15325 cut-off events. [2024-06-27 20:33:20,127 INFO L125 PetriNetUnfolderBase]: For 75256/75264 co-relation queries the response was YES. [2024-06-27 20:33:20,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60252 conditions, 15325 events. 11035/15325 cut-off events. For 75256/75264 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 84171 event pairs, 5534 based on Foata normal form. 11/15186 useless extension candidates. Maximal degree in co-relation 60223. Up to 14811 conditions per place. [2024-06-27 20:33:20,231 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 103 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-27 20:33:20,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1117 flow [2024-06-27 20:33:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 20:33:20,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-27 20:33:20,233 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 667 flow. Second operand 7 states and 175 transitions. [2024-06-27 20:33:20,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1117 flow [2024-06-27 20:33:20,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1053 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:20,277 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 744 flow [2024-06-27 20:33:20,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-27 20:33:20,278 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-27 20:33:20,279 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 744 flow [2024-06-27 20:33:20,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:20,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:20,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:20,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:33:20,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:20,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:20,280 INFO L85 PathProgramCache]: Analyzing trace with hash 664661188, now seen corresponding path program 1 times [2024-06-27 20:33:20,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:20,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515575546] [2024-06-27 20:33:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:20,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:21,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:21,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515575546] [2024-06-27 20:33:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515575546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:21,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:21,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:21,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099648759] [2024-06-27 20:33:21,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:21,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:21,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:21,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:21,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:21,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:21,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:21,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:23,153 INFO L124 PetriNetUnfolderBase]: 11124/15466 cut-off events. [2024-06-27 20:33:23,153 INFO L125 PetriNetUnfolderBase]: For 95298/95315 co-relation queries the response was YES. [2024-06-27 20:33:23,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64519 conditions, 15466 events. 11124/15466 cut-off events. For 95298/95315 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 85159 event pairs, 5222 based on Foata normal form. 16/15335 useless extension candidates. Maximal degree in co-relation 64489. Up to 14738 conditions per place. [2024-06-27 20:33:23,241 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 116 selfloop transitions, 43 changer transitions 0/166 dead transitions. [2024-06-27 20:33:23,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 166 transitions, 1484 flow [2024-06-27 20:33:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 20:33:23,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-27 20:33:23,243 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 744 flow. Second operand 7 states and 188 transitions. [2024-06-27 20:33:23,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 166 transitions, 1484 flow [2024-06-27 20:33:23,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 166 transitions, 1353 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:23,289 INFO L231 Difference]: Finished difference. Result has 90 places, 121 transitions, 904 flow [2024-06-27 20:33:23,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=90, PETRI_TRANSITIONS=121} [2024-06-27 20:33:23,291 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-27 20:33:23,291 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 121 transitions, 904 flow [2024-06-27 20:33:23,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:23,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:23,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:23,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:33:23,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:23,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1587596538, now seen corresponding path program 3 times [2024-06-27 20:33:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:23,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275273629] [2024-06-27 20:33:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:23,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:24,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275273629] [2024-06-27 20:33:24,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275273629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:24,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:24,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:24,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924499127] [2024-06-27 20:33:24,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:24,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:24,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:24,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:24,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 121 transitions, 904 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:24,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:24,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:24,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:26,109 INFO L124 PetriNetUnfolderBase]: 11146/15502 cut-off events. [2024-06-27 20:33:26,109 INFO L125 PetriNetUnfolderBase]: For 101628/101642 co-relation queries the response was YES. [2024-06-27 20:33:26,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67029 conditions, 15502 events. 11146/15502 cut-off events. For 101628/101642 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 85441 event pairs, 5328 based on Foata normal form. 11/15364 useless extension candidates. Maximal degree in co-relation 66996. Up to 14873 conditions per place. [2024-06-27 20:33:26,196 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 108 selfloop transitions, 50 changer transitions 0/165 dead transitions. [2024-06-27 20:33:26,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 165 transitions, 1492 flow [2024-06-27 20:33:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 20:33:26,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-27 20:33:26,198 INFO L175 Difference]: Start difference. First operand has 90 places, 121 transitions, 904 flow. Second operand 7 states and 179 transitions. [2024-06-27 20:33:26,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 165 transitions, 1492 flow [2024-06-27 20:33:26,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 165 transitions, 1424 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 20:33:26,249 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1063 flow [2024-06-27 20:33:26,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1063, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-27 20:33:26,250 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-27 20:33:26,250 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1063 flow [2024-06-27 20:33:26,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:26,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:26,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:26,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:33:26,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:26,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1559165858, now seen corresponding path program 2 times [2024-06-27 20:33:26,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:26,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237982905] [2024-06-27 20:33:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:26,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:27,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:27,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237982905] [2024-06-27 20:33:27,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237982905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:27,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:27,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:27,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335700449] [2024-06-27 20:33:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:27,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:27,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:27,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:27,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1063 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:27,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:27,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:27,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:28,952 INFO L124 PetriNetUnfolderBase]: 11189/15570 cut-off events. [2024-06-27 20:33:28,952 INFO L125 PetriNetUnfolderBase]: For 125163/125187 co-relation queries the response was YES. [2024-06-27 20:33:29,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71095 conditions, 15570 events. 11189/15570 cut-off events. For 125163/125187 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 85804 event pairs, 5242 based on Foata normal form. 21/15437 useless extension candidates. Maximal degree in co-relation 71060. Up to 14810 conditions per place. [2024-06-27 20:33:29,067 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 123 selfloop transitions, 50 changer transitions 0/180 dead transitions. [2024-06-27 20:33:29,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 180 transitions, 1796 flow [2024-06-27 20:33:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 20:33:29,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-27 20:33:29,069 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1063 flow. Second operand 7 states and 184 transitions. [2024-06-27 20:33:29,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 180 transitions, 1796 flow [2024-06-27 20:33:29,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 180 transitions, 1717 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:29,372 INFO L231 Difference]: Finished difference. Result has 100 places, 138 transitions, 1210 flow [2024-06-27 20:33:29,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1210, PETRI_PLACES=100, PETRI_TRANSITIONS=138} [2024-06-27 20:33:29,373 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-27 20:33:29,373 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 138 transitions, 1210 flow [2024-06-27 20:33:29,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:29,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:29,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:29,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:33:29,374 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:29,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:29,375 INFO L85 PathProgramCache]: Analyzing trace with hash 839056628, now seen corresponding path program 3 times [2024-06-27 20:33:29,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:29,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891459948] [2024-06-27 20:33:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:29,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:30,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:30,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891459948] [2024-06-27 20:33:30,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891459948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:30,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184578314] [2024-06-27 20:33:30,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:30,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:30,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 138 transitions, 1210 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:30,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:30,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:30,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:32,525 INFO L124 PetriNetUnfolderBase]: 11201/15586 cut-off events. [2024-06-27 20:33:32,525 INFO L125 PetriNetUnfolderBase]: For 146543/146567 co-relation queries the response was YES. [2024-06-27 20:33:32,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74030 conditions, 15586 events. 11201/15586 cut-off events. For 146543/146567 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 86004 event pairs, 5240 based on Foata normal form. 21/15453 useless extension candidates. Maximal degree in co-relation 73992. Up to 14827 conditions per place. [2024-06-27 20:33:32,656 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 115 selfloop transitions, 59 changer transitions 0/181 dead transitions. [2024-06-27 20:33:32,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 181 transitions, 1838 flow [2024-06-27 20:33:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 20:33:32,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-27 20:33:32,658 INFO L175 Difference]: Start difference. First operand has 100 places, 138 transitions, 1210 flow. Second operand 7 states and 181 transitions. [2024-06-27 20:33:32,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 181 transitions, 1838 flow [2024-06-27 20:33:32,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 181 transitions, 1733 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:32,769 INFO L231 Difference]: Finished difference. Result has 104 places, 143 transitions, 1305 flow [2024-06-27 20:33:32,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1305, PETRI_PLACES=104, PETRI_TRANSITIONS=143} [2024-06-27 20:33:32,770 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-27 20:33:32,770 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 143 transitions, 1305 flow [2024-06-27 20:33:32,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:32,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:32,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:32,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:33:32,771 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:32,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:32,771 INFO L85 PathProgramCache]: Analyzing trace with hash 841792522, now seen corresponding path program 4 times [2024-06-27 20:33:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:32,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725886412] [2024-06-27 20:33:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:32,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:33,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:33,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725886412] [2024-06-27 20:33:33,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725886412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:33,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:33,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199796017] [2024-06-27 20:33:33,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:33,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:33,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:33,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 143 transitions, 1305 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:33,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:33,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:33,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:35,582 INFO L124 PetriNetUnfolderBase]: 11192/15570 cut-off events. [2024-06-27 20:33:35,583 INFO L125 PetriNetUnfolderBase]: For 164334/164339 co-relation queries the response was YES. [2024-06-27 20:33:35,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75701 conditions, 15570 events. 11192/15570 cut-off events. For 164334/164339 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 85672 event pairs, 5333 based on Foata normal form. 3/15412 useless extension candidates. Maximal degree in co-relation 75661. Up to 14938 conditions per place. [2024-06-27 20:33:35,704 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 117 selfloop transitions, 50 changer transitions 0/174 dead transitions. [2024-06-27 20:33:35,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 174 transitions, 1737 flow [2024-06-27 20:33:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 20:33:35,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-27 20:33:35,705 INFO L175 Difference]: Start difference. First operand has 104 places, 143 transitions, 1305 flow. Second operand 7 states and 173 transitions. [2024-06-27 20:33:35,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 174 transitions, 1737 flow [2024-06-27 20:33:35,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 174 transitions, 1596 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:35,846 INFO L231 Difference]: Finished difference. Result has 107 places, 143 transitions, 1275 flow [2024-06-27 20:33:35,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1275, PETRI_PLACES=107, PETRI_TRANSITIONS=143} [2024-06-27 20:33:35,847 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-27 20:33:35,847 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 143 transitions, 1275 flow [2024-06-27 20:33:35,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2024-06-27 20:33:35,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:35,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:35,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:33:35,848 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:35,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:35,849 INFO L85 PathProgramCache]: Analyzing trace with hash 842038786, now seen corresponding path program 1 times [2024-06-27 20:33:35,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:35,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786818459] [2024-06-27 20:33:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:35,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:36,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786818459] [2024-06-27 20:33:36,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786818459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:36,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:36,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:36,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575465793] [2024-06-27 20:33:36,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:36,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:36,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:36,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:36,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:33:36,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 143 transitions, 1275 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 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) [2024-06-27 20:33:36,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:36,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:33:36,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:38,464 INFO L124 PetriNetUnfolderBase]: 9817/14066 cut-off events. [2024-06-27 20:33:38,464 INFO L125 PetriNetUnfolderBase]: For 154529/154534 co-relation queries the response was YES. [2024-06-27 20:33:38,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68403 conditions, 14066 events. 9817/14066 cut-off events. For 154529/154534 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 80820 event pairs, 4372 based on Foata normal form. 12/13933 useless extension candidates. Maximal degree in co-relation 68362. Up to 13184 conditions per place. [2024-06-27 20:33:38,572 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 26 changer transitions 0/183 dead transitions. [2024-06-27 20:33:38,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 183 transitions, 1895 flow [2024-06-27 20:33:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 20:33:38,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-27 20:33:38,574 INFO L175 Difference]: Start difference. First operand has 107 places, 143 transitions, 1275 flow. Second operand 7 states and 184 transitions. [2024-06-27 20:33:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 183 transitions, 1895 flow [2024-06-27 20:33:38,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1759 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:38,716 INFO L231 Difference]: Finished difference. Result has 108 places, 147 transitions, 1268 flow [2024-06-27 20:33:38,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1268, PETRI_PLACES=108, PETRI_TRANSITIONS=147} [2024-06-27 20:33:38,717 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-27 20:33:38,717 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 147 transitions, 1268 flow [2024-06-27 20:33:38,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 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) [2024-06-27 20:33:38,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:38,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:38,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:33:38,718 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:38,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:38,718 INFO L85 PathProgramCache]: Analyzing trace with hash -454462879, now seen corresponding path program 1 times [2024-06-27 20:33:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:38,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946934122] [2024-06-27 20:33:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:38,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946934122] [2024-06-27 20:33:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946934122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:39,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:33:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489992258] [2024-06-27 20:33:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:33:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:33:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:33:39,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:33:39,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 147 transitions, 1268 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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) [2024-06-27 20:33:39,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:39,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:33:39,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:40,936 INFO L124 PetriNetUnfolderBase]: 9247/13478 cut-off events. [2024-06-27 20:33:40,936 INFO L125 PetriNetUnfolderBase]: For 171205/171222 co-relation queries the response was YES. [2024-06-27 20:33:41,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68810 conditions, 13478 events. 9247/13478 cut-off events. For 171205/171222 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 79836 event pairs, 4523 based on Foata normal form. 17/13345 useless extension candidates. Maximal degree in co-relation 68768. Up to 12528 conditions per place. [2024-06-27 20:33:41,081 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 132 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2024-06-27 20:33:41,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 161 transitions, 1596 flow [2024-06-27 20:33:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:33:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:33:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 20:33:41,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-27 20:33:41,083 INFO L175 Difference]: Start difference. First operand has 108 places, 147 transitions, 1268 flow. Second operand 5 states and 127 transitions. [2024-06-27 20:33:41,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 161 transitions, 1596 flow [2024-06-27 20:33:41,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 161 transitions, 1487 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:41,211 INFO L231 Difference]: Finished difference. Result has 108 places, 147 transitions, 1188 flow [2024-06-27 20:33:41,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1188, PETRI_PLACES=108, PETRI_TRANSITIONS=147} [2024-06-27 20:33:41,212 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-27 20:33:41,212 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 147 transitions, 1188 flow [2024-06-27 20:33:41,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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) [2024-06-27 20:33:41,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:41,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:41,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:33:41,213 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:41,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash -874062608, now seen corresponding path program 1 times [2024-06-27 20:33:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:41,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100188292] [2024-06-27 20:33:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:42,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:42,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100188292] [2024-06-27 20:33:42,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100188292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:42,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:42,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:42,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881137672] [2024-06-27 20:33:42,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:42,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:42,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:42,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:42,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:42,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 147 transitions, 1188 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:42,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:42,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:42,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:44,301 INFO L124 PetriNetUnfolderBase]: 11294/15582 cut-off events. [2024-06-27 20:33:44,301 INFO L125 PetriNetUnfolderBase]: For 225813/225824 co-relation queries the response was YES. [2024-06-27 20:33:44,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81275 conditions, 15582 events. 11294/15582 cut-off events. For 225813/225824 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 85197 event pairs, 5048 based on Foata normal form. 15/15514 useless extension candidates. Maximal degree in co-relation 81232. Up to 15032 conditions per place. [2024-06-27 20:33:44,404 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 157 selfloop transitions, 48 changer transitions 0/212 dead transitions. [2024-06-27 20:33:44,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 212 transitions, 2120 flow [2024-06-27 20:33:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 20:33:44,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-27 20:33:44,406 INFO L175 Difference]: Start difference. First operand has 108 places, 147 transitions, 1188 flow. Second operand 8 states and 210 transitions. [2024-06-27 20:33:44,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 212 transitions, 2120 flow [2024-06-27 20:33:44,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 212 transitions, 2091 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:44,507 INFO L231 Difference]: Finished difference. Result has 114 places, 161 transitions, 1495 flow [2024-06-27 20:33:44,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1495, PETRI_PLACES=114, PETRI_TRANSITIONS=161} [2024-06-27 20:33:44,508 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-27 20:33:44,508 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 161 transitions, 1495 flow [2024-06-27 20:33:44,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:44,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:44,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:44,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:33:44,509 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:44,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash -870343538, now seen corresponding path program 2 times [2024-06-27 20:33:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:44,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211386748] [2024-06-27 20:33:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:44,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:45,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:45,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211386748] [2024-06-27 20:33:45,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211386748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:45,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:45,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:45,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504400479] [2024-06-27 20:33:45,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:45,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:45,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:45,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:45,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 161 transitions, 1495 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:45,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:45,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:45,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:47,623 INFO L124 PetriNetUnfolderBase]: 11414/15758 cut-off events. [2024-06-27 20:33:47,623 INFO L125 PetriNetUnfolderBase]: For 271019/271030 co-relation queries the response was YES. [2024-06-27 20:33:47,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88531 conditions, 15758 events. 11414/15758 cut-off events. For 271019/271030 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 86377 event pairs, 5068 based on Foata normal form. 8/15674 useless extension candidates. Maximal degree in co-relation 88486. Up to 14721 conditions per place. [2024-06-27 20:33:47,790 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 133 selfloop transitions, 88 changer transitions 0/228 dead transitions. [2024-06-27 20:33:47,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 228 transitions, 2675 flow [2024-06-27 20:33:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 20:33:47,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2024-06-27 20:33:47,792 INFO L175 Difference]: Start difference. First operand has 114 places, 161 transitions, 1495 flow. Second operand 8 states and 218 transitions. [2024-06-27 20:33:47,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 228 transitions, 2675 flow [2024-06-27 20:33:47,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 228 transitions, 2524 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:47,991 INFO L231 Difference]: Finished difference. Result has 119 places, 175 transitions, 1759 flow [2024-06-27 20:33:47,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1759, PETRI_PLACES=119, PETRI_TRANSITIONS=175} [2024-06-27 20:33:47,991 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-27 20:33:47,991 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 175 transitions, 1759 flow [2024-06-27 20:33:47,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:47,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:47,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:47,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:33:47,992 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:47,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:47,992 INFO L85 PathProgramCache]: Analyzing trace with hash -870337958, now seen corresponding path program 3 times [2024-06-27 20:33:47,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:47,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839702084] [2024-06-27 20:33:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:47,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:48,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:48,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839702084] [2024-06-27 20:33:48,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839702084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:48,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:48,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:48,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657189886] [2024-06-27 20:33:48,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:48,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:48,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:48,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:48,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:49,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:49,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 175 transitions, 1759 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:49,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:49,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:49,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:51,127 INFO L124 PetriNetUnfolderBase]: 11426/15781 cut-off events. [2024-06-27 20:33:51,127 INFO L125 PetriNetUnfolderBase]: For 314136/314147 co-relation queries the response was YES. [2024-06-27 20:33:51,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93945 conditions, 15781 events. 11426/15781 cut-off events. For 314136/314147 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 86777 event pairs, 5068 based on Foata normal form. 8/15697 useless extension candidates. Maximal degree in co-relation 93898. Up to 14738 conditions per place. [2024-06-27 20:33:51,306 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 124 selfloop transitions, 98 changer transitions 0/229 dead transitions. [2024-06-27 20:33:51,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 229 transitions, 2723 flow [2024-06-27 20:33:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 20:33:51,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-27 20:33:51,308 INFO L175 Difference]: Start difference. First operand has 119 places, 175 transitions, 1759 flow. Second operand 8 states and 215 transitions. [2024-06-27 20:33:51,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 229 transitions, 2723 flow [2024-06-27 20:33:51,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 229 transitions, 2544 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:51,571 INFO L231 Difference]: Finished difference. Result has 124 places, 180 transitions, 1884 flow [2024-06-27 20:33:51,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1884, PETRI_PLACES=124, PETRI_TRANSITIONS=180} [2024-06-27 20:33:51,571 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-27 20:33:51,572 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 180 transitions, 1884 flow [2024-06-27 20:33:51,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:51,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:51,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:51,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:33:51,572 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:51,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:51,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1462843734, now seen corresponding path program 4 times [2024-06-27 20:33:51,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:51,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440714582] [2024-06-27 20:33:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:51,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:52,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:52,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440714582] [2024-06-27 20:33:52,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440714582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:52,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:52,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:52,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474961717] [2024-06-27 20:33:52,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:52,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:52,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:52,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:52,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:52,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:52,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 180 transitions, 1884 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:52,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:52,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:52,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:54,909 INFO L124 PetriNetUnfolderBase]: 11523/15942 cut-off events. [2024-06-27 20:33:54,909 INFO L125 PetriNetUnfolderBase]: For 333094/333102 co-relation queries the response was YES. [2024-06-27 20:33:55,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94678 conditions, 15942 events. 11523/15942 cut-off events. For 333094/333102 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 87847 event pairs, 5064 based on Foata normal form. 7/15847 useless extension candidates. Maximal degree in co-relation 94629. Up to 14829 conditions per place. [2024-06-27 20:33:55,082 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 131 selfloop transitions, 102 changer transitions 0/240 dead transitions. [2024-06-27 20:33:55,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 240 transitions, 3086 flow [2024-06-27 20:33:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 20:33:55,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-27 20:33:55,084 INFO L175 Difference]: Start difference. First operand has 124 places, 180 transitions, 1884 flow. Second operand 8 states and 215 transitions. [2024-06-27 20:33:55,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 240 transitions, 3086 flow [2024-06-27 20:33:55,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 240 transitions, 2864 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:55,303 INFO L231 Difference]: Finished difference. Result has 129 places, 191 transitions, 2129 flow [2024-06-27 20:33:55,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2129, PETRI_PLACES=129, PETRI_TRANSITIONS=191} [2024-06-27 20:33:55,304 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-27 20:33:55,304 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 191 transitions, 2129 flow [2024-06-27 20:33:55,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:55,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:55,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:55,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:33:55,305 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:55,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2114952222, now seen corresponding path program 5 times [2024-06-27 20:33:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:55,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848185949] [2024-06-27 20:33:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:55,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:56,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:56,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848185949] [2024-06-27 20:33:56,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848185949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:56,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:56,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:56,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124615023] [2024-06-27 20:33:56,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:56,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:56,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:56,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:33:56,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 191 transitions, 2129 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:56,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:56,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:33:56,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:58,509 INFO L124 PetriNetUnfolderBase]: 11535/15967 cut-off events. [2024-06-27 20:33:58,509 INFO L125 PetriNetUnfolderBase]: For 375956/375964 co-relation queries the response was YES. [2024-06-27 20:33:58,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97963 conditions, 15967 events. 11535/15967 cut-off events. For 375956/375964 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 88106 event pairs, 5062 based on Foata normal form. 7/15871 useless extension candidates. Maximal degree in co-relation 97911. Up to 14846 conditions per place. [2024-06-27 20:33:58,692 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 114 selfloop transitions, 120 changer transitions 0/241 dead transitions. [2024-06-27 20:33:58,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 241 transitions, 3097 flow [2024-06-27 20:33:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 20:33:58,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-27 20:33:58,693 INFO L175 Difference]: Start difference. First operand has 129 places, 191 transitions, 2129 flow. Second operand 8 states and 211 transitions. [2024-06-27 20:33:58,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 241 transitions, 3097 flow [2024-06-27 20:33:59,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 241 transitions, 2729 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:59,252 INFO L231 Difference]: Finished difference. Result has 131 places, 196 transitions, 2117 flow [2024-06-27 20:33:59,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2117, PETRI_PLACES=131, PETRI_TRANSITIONS=196} [2024-06-27 20:33:59,252 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-27 20:33:59,253 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 196 transitions, 2117 flow [2024-06-27 20:33:59,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:33:59,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:59,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:33:59,253 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:33:59,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:59,254 INFO L85 PathProgramCache]: Analyzing trace with hash 325766286, now seen corresponding path program 6 times [2024-06-27 20:33:59,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:59,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130057566] [2024-06-27 20:33:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:00,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:00,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130057566] [2024-06-27 20:34:00,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130057566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:00,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:00,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:00,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358002119] [2024-06-27 20:34:00,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:00,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:00,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:00,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:00,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:00,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:00,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 196 transitions, 2117 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:00,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:00,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:00,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:02,647 INFO L124 PetriNetUnfolderBase]: 11524/15953 cut-off events. [2024-06-27 20:34:02,648 INFO L125 PetriNetUnfolderBase]: For 396076/396084 co-relation queries the response was YES. [2024-06-27 20:34:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98293 conditions, 15953 events. 11524/15953 cut-off events. For 396076/396084 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 87901 event pairs, 5062 based on Foata normal form. 7/15857 useless extension candidates. Maximal degree in co-relation 98241. Up to 14839 conditions per place. [2024-06-27 20:34:02,785 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 130 selfloop transitions, 105 changer transitions 0/242 dead transitions. [2024-06-27 20:34:02,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 242 transitions, 3043 flow [2024-06-27 20:34:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 20:34:02,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:34:02,786 INFO L175 Difference]: Start difference. First operand has 131 places, 196 transitions, 2117 flow. Second operand 8 states and 212 transitions. [2024-06-27 20:34:02,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 242 transitions, 3043 flow [2024-06-27 20:34:03,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 242 transitions, 2767 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:03,075 INFO L231 Difference]: Finished difference. Result has 134 places, 196 transitions, 2064 flow [2024-06-27 20:34:03,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2064, PETRI_PLACES=134, PETRI_TRANSITIONS=196} [2024-06-27 20:34:03,076 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-27 20:34:03,076 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 196 transitions, 2064 flow [2024-06-27 20:34:03,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:03,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:03,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:03,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:34:03,077 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:03,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1203445895, now seen corresponding path program 1 times [2024-06-27 20:34:03,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:03,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208458846] [2024-06-27 20:34:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:03,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:03,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:03,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208458846] [2024-06-27 20:34:03,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208458846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:03,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:03,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:34:03,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773412886] [2024-06-27 20:34:03,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:03,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:34:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:34:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:34:03,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:34:03,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 196 transitions, 2064 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-27 20:34:03,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:03,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:34:03,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:05,778 INFO L124 PetriNetUnfolderBase]: 9555/14197 cut-off events. [2024-06-27 20:34:05,778 INFO L125 PetriNetUnfolderBase]: For 359542/359559 co-relation queries the response was YES. [2024-06-27 20:34:05,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86265 conditions, 14197 events. 9555/14197 cut-off events. For 359542/359559 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 87266 event pairs, 4305 based on Foata normal form. 19/14187 useless extension candidates. Maximal degree in co-relation 86212. Up to 12885 conditions per place. [2024-06-27 20:34:05,923 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 186 selfloop transitions, 14 changer transitions 0/219 dead transitions. [2024-06-27 20:34:05,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 219 transitions, 2572 flow [2024-06-27 20:34:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:34:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:34:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 20:34:05,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-27 20:34:05,925 INFO L175 Difference]: Start difference. First operand has 134 places, 196 transitions, 2064 flow. Second operand 6 states and 150 transitions. [2024-06-27 20:34:05,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 219 transitions, 2572 flow [2024-06-27 20:34:06,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 219 transitions, 2340 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:06,185 INFO L231 Difference]: Finished difference. Result has 133 places, 200 transitions, 1927 flow [2024-06-27 20:34:06,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1927, PETRI_PLACES=133, PETRI_TRANSITIONS=200} [2024-06-27 20:34:06,185 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-06-27 20:34:06,185 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 200 transitions, 1927 flow [2024-06-27 20:34:06,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-27 20:34:06,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:06,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:06,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:34:06,186 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:06,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 848790039, now seen corresponding path program 1 times [2024-06-27 20:34:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:06,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622392856] [2024-06-27 20:34:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:07,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:07,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622392856] [2024-06-27 20:34:07,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622392856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:07,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:07,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831576504] [2024-06-27 20:34:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:07,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:07,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:07,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:07,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 200 transitions, 1927 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:07,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:07,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:07,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:09,405 INFO L124 PetriNetUnfolderBase]: 11597/16288 cut-off events. [2024-06-27 20:34:09,405 INFO L125 PetriNetUnfolderBase]: For 453114/453122 co-relation queries the response was YES. [2024-06-27 20:34:09,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103242 conditions, 16288 events. 11597/16288 cut-off events. For 453114/453122 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 91765 event pairs, 3948 based on Foata normal form. 14/16277 useless extension candidates. Maximal degree in co-relation 103189. Up to 15428 conditions per place. [2024-06-27 20:34:09,826 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 213 selfloop transitions, 43 changer transitions 0/263 dead transitions. [2024-06-27 20:34:09,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 263 transitions, 2917 flow [2024-06-27 20:34:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 20:34:09,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-27 20:34:09,827 INFO L175 Difference]: Start difference. First operand has 133 places, 200 transitions, 1927 flow. Second operand 9 states and 225 transitions. [2024-06-27 20:34:09,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 263 transitions, 2917 flow [2024-06-27 20:34:10,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 263 transitions, 2852 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:10,092 INFO L231 Difference]: Finished difference. Result has 138 places, 206 transitions, 2132 flow [2024-06-27 20:34:10,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2132, PETRI_PLACES=138, PETRI_TRANSITIONS=206} [2024-06-27 20:34:10,092 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-27 20:34:10,093 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 206 transitions, 2132 flow [2024-06-27 20:34:10,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:10,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:10,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:10,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:34:10,093 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:10,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1326140121, now seen corresponding path program 2 times [2024-06-27 20:34:10,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:10,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038345956] [2024-06-27 20:34:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:11,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038345956] [2024-06-27 20:34:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038345956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:11,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:11,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:11,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464996721] [2024-06-27 20:34:11,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:11,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:11,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:11,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:11,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 206 transitions, 2132 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:11,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:11,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:11,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:13,617 INFO L124 PetriNetUnfolderBase]: 11582/16261 cut-off events. [2024-06-27 20:34:13,618 INFO L125 PetriNetUnfolderBase]: For 494264/494272 co-relation queries the response was YES. [2024-06-27 20:34:13,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105842 conditions, 16261 events. 11582/16261 cut-off events. For 494264/494272 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 91506 event pairs, 4701 based on Foata normal form. 14/16253 useless extension candidates. Maximal degree in co-relation 105788. Up to 15514 conditions per place. [2024-06-27 20:34:13,759 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 208 selfloop transitions, 37 changer transitions 0/252 dead transitions. [2024-06-27 20:34:13,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 252 transitions, 2774 flow [2024-06-27 20:34:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 20:34:13,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-27 20:34:13,760 INFO L175 Difference]: Start difference. First operand has 138 places, 206 transitions, 2132 flow. Second operand 8 states and 198 transitions. [2024-06-27 20:34:13,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 252 transitions, 2774 flow [2024-06-27 20:34:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 252 transitions, 2581 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:14,222 INFO L231 Difference]: Finished difference. Result has 141 places, 206 transitions, 2024 flow [2024-06-27 20:34:14,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2024, PETRI_PLACES=141, PETRI_TRANSITIONS=206} [2024-06-27 20:34:14,223 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-27 20:34:14,223 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 206 transitions, 2024 flow [2024-06-27 20:34:14,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:14,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:14,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:14,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:34:14,224 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:14,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1210848951, now seen corresponding path program 3 times [2024-06-27 20:34:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:14,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055675155] [2024-06-27 20:34:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:14,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:15,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:15,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055675155] [2024-06-27 20:34:15,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055675155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:15,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:15,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071764889] [2024-06-27 20:34:15,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:15,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:15,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:15,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 206 transitions, 2024 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:15,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:15,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:15,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:18,209 INFO L124 PetriNetUnfolderBase]: 11618/16312 cut-off events. [2024-06-27 20:34:18,209 INFO L125 PetriNetUnfolderBase]: For 523644/523658 co-relation queries the response was YES. [2024-06-27 20:34:18,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107024 conditions, 16312 events. 11618/16312 cut-off events. For 523644/523658 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 91736 event pairs, 4714 based on Foata normal form. 14/16302 useless extension candidates. Maximal degree in co-relation 106968. Up to 15491 conditions per place. [2024-06-27 20:34:18,445 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 190 selfloop transitions, 53 changer transitions 0/250 dead transitions. [2024-06-27 20:34:18,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 250 transitions, 2728 flow [2024-06-27 20:34:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 20:34:18,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-27 20:34:18,447 INFO L175 Difference]: Start difference. First operand has 141 places, 206 transitions, 2024 flow. Second operand 8 states and 199 transitions. [2024-06-27 20:34:18,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 250 transitions, 2728 flow [2024-06-27 20:34:18,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 250 transitions, 2644 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:18,786 INFO L231 Difference]: Finished difference. Result has 142 places, 209 transitions, 2152 flow [2024-06-27 20:34:18,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2152, PETRI_PLACES=142, PETRI_TRANSITIONS=209} [2024-06-27 20:34:18,786 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-27 20:34:18,786 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 209 transitions, 2152 flow [2024-06-27 20:34:18,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:18,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:18,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:18,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:34:18,787 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:18,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1063306995, now seen corresponding path program 1 times [2024-06-27 20:34:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:18,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712876919] [2024-06-27 20:34:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:18,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:19,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712876919] [2024-06-27 20:34:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712876919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:19,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:19,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:19,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238525908] [2024-06-27 20:34:19,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:19,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:19,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:19,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:19,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:19,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 209 transitions, 2152 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:19,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:19,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:19,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:22,620 INFO L124 PetriNetUnfolderBase]: 11689/16388 cut-off events. [2024-06-27 20:34:22,620 INFO L125 PetriNetUnfolderBase]: For 577508/577528 co-relation queries the response was YES. [2024-06-27 20:34:22,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110562 conditions, 16388 events. 11689/16388 cut-off events. For 577508/577528 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 92108 event pairs, 4664 based on Foata normal form. 23/16371 useless extension candidates. Maximal degree in co-relation 110505. Up to 15453 conditions per place. [2024-06-27 20:34:22,766 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 198 selfloop transitions, 58 changer transitions 0/263 dead transitions. [2024-06-27 20:34:22,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 263 transitions, 3210 flow [2024-06-27 20:34:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 20:34:22,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-27 20:34:22,768 INFO L175 Difference]: Start difference. First operand has 142 places, 209 transitions, 2152 flow. Second operand 8 states and 211 transitions. [2024-06-27 20:34:22,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 263 transitions, 3210 flow [2024-06-27 20:34:23,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 263 transitions, 3024 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:23,175 INFO L231 Difference]: Finished difference. Result has 144 places, 213 transitions, 2189 flow [2024-06-27 20:34:23,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2189, PETRI_PLACES=144, PETRI_TRANSITIONS=213} [2024-06-27 20:34:23,176 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-27 20:34:23,176 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 213 transitions, 2189 flow [2024-06-27 20:34:23,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:23,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:23,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:23,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:34:23,176 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:23,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash 162975198, now seen corresponding path program 1 times [2024-06-27 20:34:23,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:23,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157362423] [2024-06-27 20:34:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:23,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:23,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157362423] [2024-06-27 20:34:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157362423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:23,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:23,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:34:23,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689340081] [2024-06-27 20:34:23,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:23,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:34:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:34:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:34:24,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:34:24,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 213 transitions, 2189 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) [2024-06-27 20:34:24,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:24,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:34:24,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:26,602 INFO L124 PetriNetUnfolderBase]: 11087/15790 cut-off events. [2024-06-27 20:34:26,602 INFO L125 PetriNetUnfolderBase]: For 610697/610735 co-relation queries the response was YES. [2024-06-27 20:34:26,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110627 conditions, 15790 events. 11087/15790 cut-off events. For 610697/610735 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 91567 event pairs, 4663 based on Foata normal form. 27/15780 useless extension candidates. Maximal degree in co-relation 110569. Up to 14832 conditions per place. [2024-06-27 20:34:26,749 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 185 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2024-06-27 20:34:26,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 245 transitions, 2917 flow [2024-06-27 20:34:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:34:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:34:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 20:34:26,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-27 20:34:26,750 INFO L175 Difference]: Start difference. First operand has 144 places, 213 transitions, 2189 flow. Second operand 6 states and 154 transitions. [2024-06-27 20:34:26,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 245 transitions, 2917 flow [2024-06-27 20:34:27,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 245 transitions, 2720 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:27,315 INFO L231 Difference]: Finished difference. Result has 144 places, 220 transitions, 2186 flow [2024-06-27 20:34:27,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2186, PETRI_PLACES=144, PETRI_TRANSITIONS=220} [2024-06-27 20:34:27,315 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-27 20:34:27,316 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 220 transitions, 2186 flow [2024-06-27 20:34:27,316 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) [2024-06-27 20:34:27,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:27,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:27,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:34:27,316 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:27,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1348456805, now seen corresponding path program 4 times [2024-06-27 20:34:27,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:27,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406994187] [2024-06-27 20:34:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:28,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:28,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406994187] [2024-06-27 20:34:28,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406994187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:28,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:28,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:28,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34697158] [2024-06-27 20:34:28,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:28,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:28,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:28,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:28,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:28,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:28,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 220 transitions, 2186 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:28,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:28,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:28,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:31,023 INFO L124 PetriNetUnfolderBase]: 11706/16414 cut-off events. [2024-06-27 20:34:31,023 INFO L125 PetriNetUnfolderBase]: For 642082/642087 co-relation queries the response was YES. [2024-06-27 20:34:31,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114194 conditions, 16414 events. 11706/16414 cut-off events. For 642082/642087 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 92076 event pairs, 4678 based on Foata normal form. 6/16375 useless extension candidates. Maximal degree in co-relation 114135. Up to 15613 conditions per place. [2024-06-27 20:34:31,162 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 202 selfloop transitions, 53 changer transitions 0/262 dead transitions. [2024-06-27 20:34:31,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 262 transitions, 2918 flow [2024-06-27 20:34:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 20:34:31,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-27 20:34:31,164 INFO L175 Difference]: Start difference. First operand has 144 places, 220 transitions, 2186 flow. Second operand 8 states and 196 transitions. [2024-06-27 20:34:31,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 262 transitions, 2918 flow [2024-06-27 20:34:31,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 262 transitions, 2831 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:31,537 INFO L231 Difference]: Finished difference. Result has 149 places, 223 transitions, 2321 flow [2024-06-27 20:34:31,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2321, PETRI_PLACES=149, PETRI_TRANSITIONS=223} [2024-06-27 20:34:31,537 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-27 20:34:31,537 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 223 transitions, 2321 flow [2024-06-27 20:34:31,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:31,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:31,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:31,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:34:31,538 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:31,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1348272107, now seen corresponding path program 2 times [2024-06-27 20:34:31,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:31,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465018667] [2024-06-27 20:34:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:31,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:32,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:32,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465018667] [2024-06-27 20:34:32,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465018667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:32,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:32,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277549395] [2024-06-27 20:34:32,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:32,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:32,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:32,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:32,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 223 transitions, 2321 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:32,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:32,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:32,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:35,522 INFO L124 PetriNetUnfolderBase]: 11777/16509 cut-off events. [2024-06-27 20:34:35,522 INFO L125 PetriNetUnfolderBase]: For 695069/695096 co-relation queries the response was YES. [2024-06-27 20:34:35,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117808 conditions, 16509 events. 11777/16509 cut-off events. For 695069/695096 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 92712 event pairs, 4651 based on Foata normal form. 28/16499 useless extension candidates. Maximal degree in co-relation 117748. Up to 15566 conditions per place. [2024-06-27 20:34:35,683 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 207 selfloop transitions, 61 changer transitions 0/275 dead transitions. [2024-06-27 20:34:35,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 275 transitions, 3445 flow [2024-06-27 20:34:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 20:34:35,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-27 20:34:35,684 INFO L175 Difference]: Start difference. First operand has 149 places, 223 transitions, 2321 flow. Second operand 8 states and 207 transitions. [2024-06-27 20:34:35,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 275 transitions, 3445 flow [2024-06-27 20:34:36,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 275 transitions, 3249 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:36,376 INFO L231 Difference]: Finished difference. Result has 151 places, 227 transitions, 2366 flow [2024-06-27 20:34:36,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2366, PETRI_PLACES=151, PETRI_TRANSITIONS=227} [2024-06-27 20:34:36,376 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-27 20:34:36,377 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 227 transitions, 2366 flow [2024-06-27 20:34:36,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:36,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:36,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:36,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:34:36,378 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:36,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1112096747, now seen corresponding path program 3 times [2024-06-27 20:34:36,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:36,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901256114] [2024-06-27 20:34:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:36,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:37,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:37,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901256114] [2024-06-27 20:34:37,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901256114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:37,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:37,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:37,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807055798] [2024-06-27 20:34:37,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:37,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:37,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:37,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:37,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 227 transitions, 2366 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:37,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:37,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:37,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:40,263 INFO L124 PetriNetUnfolderBase]: 11848/16620 cut-off events. [2024-06-27 20:34:40,263 INFO L125 PetriNetUnfolderBase]: For 749119/749146 co-relation queries the response was YES. [2024-06-27 20:34:40,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121831 conditions, 16620 events. 11848/16620 cut-off events. For 749119/749146 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 93348 event pairs, 4659 based on Foata normal form. 28/16605 useless extension candidates. Maximal degree in co-relation 121770. Up to 15667 conditions per place. [2024-06-27 20:34:40,433 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 204 selfloop transitions, 66 changer transitions 0/277 dead transitions. [2024-06-27 20:34:40,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 277 transitions, 3394 flow [2024-06-27 20:34:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 20:34:40,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-27 20:34:40,435 INFO L175 Difference]: Start difference. First operand has 151 places, 227 transitions, 2366 flow. Second operand 8 states and 205 transitions. [2024-06-27 20:34:40,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 277 transitions, 3394 flow [2024-06-27 20:34:40,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 277 transitions, 3185 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:40,844 INFO L231 Difference]: Finished difference. Result has 153 places, 231 transitions, 2416 flow [2024-06-27 20:34:40,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2416, PETRI_PLACES=153, PETRI_TRANSITIONS=231} [2024-06-27 20:34:40,845 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-27 20:34:40,845 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 231 transitions, 2416 flow [2024-06-27 20:34:40,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:40,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:40,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:40,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:34:40,845 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:40,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1111800077, now seen corresponding path program 4 times [2024-06-27 20:34:40,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:40,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271234524] [2024-06-27 20:34:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:40,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:41,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:41,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271234524] [2024-06-27 20:34:41,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271234524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:41,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:41,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:41,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264211972] [2024-06-27 20:34:41,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:41,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:41,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:41,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:41,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:42,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:34:42,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 231 transitions, 2416 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 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) [2024-06-27 20:34:42,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:42,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:34:42,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand