./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix007.oepc.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/mutex-meet-nonrel/mix007.oepc.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/mix007.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix007.oepc.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 [2024-06-28 02:55:14,572 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:55:14,633 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:55:14,638 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:55:14,639 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:55:14,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:55:14,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:55:14,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:55:14,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:55:14,658 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:55:14,658 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:55:14,658 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:55:14,659 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:55:14,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:55:14,661 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:55:14,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:55:14,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:55:14,664 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:55:14,664 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:55:14,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:55:14,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:55:14,665 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:55:14,665 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:55:14,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:55:14,666 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:55:14,666 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:55:14,666 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:55:14,666 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:55:14,667 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:55:14,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:55:14,668 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:55:14,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:55:14,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:55:14,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:55:14,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:55:14,669 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:55:14,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:55:14,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:55:14,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:55:14,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:55:14,669 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:55:14,670 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:55:14,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:55:14,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:55:14,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:55:14,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:55:14,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:55:14,903 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:55:14,904 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:55:14,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix007.oepc.i [2024-06-28 02:55:16,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:55:16,285 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:55:16,288 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix007.oepc.i [2024-06-28 02:55:16,308 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08aa79ce1/4f93f398b99a4c69ade6b64ab6e54f7b/FLAG0473388d3 [2024-06-28 02:55:16,322 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08aa79ce1/4f93f398b99a4c69ade6b64ab6e54f7b [2024-06-28 02:55:16,324 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:55:16,325 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:55:16,326 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix007.oepc.yml/witness.yml [2024-06-28 02:55:16,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:55:16,546 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:55:16,547 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:55:16,548 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:55:16,557 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:55:16,557 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:55:16" (1/2) ... [2024-06-28 02:55:16,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dedd379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:16, skipping insertion in model container [2024-06-28 02:55:16,559 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:55:16" (1/2) ... [2024-06-28 02:55:16,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54f27de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:16, skipping insertion in model container [2024-06-28 02:55:16,597 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:55:16" (2/2) ... [2024-06-28 02:55:16,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dedd379 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:16, skipping insertion in model container [2024-06-28 02:55:16,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:55:16" (2/2) ... [2024-06-28 02:55:16,597 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:55:16,708 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:55:16,709 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0) [2024-06-28 02:55:16,710 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0) [2024-06-28 02:55:16,710 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0) [2024-06-28 02:55:16,710 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] (((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0) [2024-06-28 02:55:16,710 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:55:16,711 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-28 02:55:16,748 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:55:17,028 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:55:17,036 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:55:17,197 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:55:17,236 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:55:17,237 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17 WrapperNode [2024-06-28 02:55:17,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:55:17,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:55:17,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:55:17,238 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:55:17,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,260 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,300 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 140 [2024-06-28 02:55:17,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:55:17,301 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:55:17,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:55:17,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:55:17,310 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,315 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,339 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]. [2024-06-28 02:55:17,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,361 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,362 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,364 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:55:17,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:55:17,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:55:17,370 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:55:17,371 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (1/1) ... [2024-06-28 02:55:17,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:55:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:55:17,412 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) [2024-06-28 02:55:17,454 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 [2024-06-28 02:55:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:55:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:55:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:55:17,480 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:55:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:55:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:55:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:55:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:55:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 02:55:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 02:55:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:55:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:55:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:55:17,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:55:17,495 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:55:17,615 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:55:17,618 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:55:18,019 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:55:18,020 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:55:18,182 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:55:18,183 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:55:18,183 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:55:18 BoogieIcfgContainer [2024-06-28 02:55:18,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:55:18,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:55:18,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:55:18,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:55:18,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:55:16" (1/4) ... [2024-06-28 02:55:18,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b592666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:55:18, skipping insertion in model container [2024-06-28 02:55:18,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:55:16" (2/4) ... [2024-06-28 02:55:18,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b592666 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:55:18, skipping insertion in model container [2024-06-28 02:55:18,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:17" (3/4) ... [2024-06-28 02:55:18,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b592666 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:55:18, skipping insertion in model container [2024-06-28 02:55:18,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:55:18" (4/4) ... [2024-06-28 02:55:18,194 INFO L112 eAbstractionObserver]: Analyzing ICFG mix007.oepc.i [2024-06-28 02:55:18,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:55:18,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:55:18,208 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:55:18,330 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:55:18,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-28 02:55:18,415 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-28 02:55:18,415 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:55:18,417 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 95 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. [2024-06-28 02:55:18,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-28 02:55:18,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-28 02:55:18,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:55:18,439 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;@3b763b18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:55:18,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 02:55:18,443 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:55:18,443 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:55:18,443 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:55:18,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:18,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:55:18,444 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)] === [2024-06-28 02:55:18,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash 408787517, now seen corresponding path program 1 times [2024-06-28 02:55:18,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:18,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192645583] [2024-06-28 02:55:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:18,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:19,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192645583] [2024-06-28 02:55:19,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192645583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:19,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:19,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:55:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481017062] [2024-06-28 02:55:19,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:55:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:55:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:55:19,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-28 02:55:19,454 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) [2024-06-28 02:55:19,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:19,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-28 02:55:19,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:20,892 INFO L124 PetriNetUnfolderBase]: 9583/13466 cut-off events. [2024-06-28 02:55:20,892 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-28 02:55:20,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26864 conditions, 13466 events. 9583/13466 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 75722 event pairs, 7347 based on Foata normal form. 1/13147 useless extension candidates. Maximal degree in co-relation 26851. Up to 13009 conditions per place. [2024-06-28 02:55:20,963 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 43 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-28 02:55:20,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 231 flow [2024-06-28 02:55:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:55:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:55:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-28 02:55:20,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-06-28 02:55:20,975 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 100 transitions. [2024-06-28 02:55:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 231 flow [2024-06-28 02:55:20,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:20,981 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-28 02:55:20,983 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} [2024-06-28 02:55:20,985 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-28 02:55:20,985 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-28 02:55:20,985 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) [2024-06-28 02:55:20,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:20,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:20,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:55:20,986 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)] === [2024-06-28 02:55:20,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2002836572, now seen corresponding path program 1 times [2024-06-28 02:55:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:20,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645249466] [2024-06-28 02:55:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:21,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:21,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645249466] [2024-06-28 02:55:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645249466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:21,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:21,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:55:21,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430337666] [2024-06-28 02:55:21,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:21,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:55:21,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:21,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:55:21,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:55:21,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-28 02:55:21,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-06-28 02:55:21,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:21,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-28 02:55:21,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:23,366 INFO L124 PetriNetUnfolderBase]: 9573/13452 cut-off events. [2024-06-28 02:55:23,366 INFO L125 PetriNetUnfolderBase]: For 2592/2592 co-relation queries the response was YES. [2024-06-28 02:55:23,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30290 conditions, 13452 events. 9573/13452 cut-off events. For 2592/2592 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 75526 event pairs, 6546 based on Foata normal form. 4/13318 useless extension candidates. Maximal degree in co-relation 30278. Up to 12974 conditions per place. [2024-06-28 02:55:23,429 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-28 02:55:23,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 323 flow [2024-06-28 02:55:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:55:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:55:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-28 02:55:23,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132075471698113 [2024-06-28 02:55:23,434 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 130 transitions. [2024-06-28 02:55:23,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 323 flow [2024-06-28 02:55:23,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:55:23,437 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-28 02:55:23,437 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} [2024-06-28 02:55:23,438 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-28 02:55:23,438 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-28 02:55:23,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-06-28 02:55:23,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:23,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:55:23,441 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)] === [2024-06-28 02:55:23,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:23,450 INFO L85 PathProgramCache]: Analyzing trace with hash 580655739, now seen corresponding path program 1 times [2024-06-28 02:55:23,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:23,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916465471] [2024-06-28 02:55:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:23,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:24,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:24,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916465471] [2024-06-28 02:55:24,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916465471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:24,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:24,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:55:24,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813813783] [2024-06-28 02:55:24,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:24,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:55:24,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:55:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:55:24,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-28 02:55:24,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2024-06-28 02:55:24,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:24,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-28 02:55:24,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:26,145 INFO L124 PetriNetUnfolderBase]: 11609/16251 cut-off events. [2024-06-28 02:55:26,145 INFO L125 PetriNetUnfolderBase]: For 8523/8523 co-relation queries the response was YES. [2024-06-28 02:55:26,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40402 conditions, 16251 events. 11609/16251 cut-off events. For 8523/8523 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 91580 event pairs, 6715 based on Foata normal form. 4/16086 useless extension candidates. Maximal degree in co-relation 40388. Up to 15648 conditions per place. [2024-06-28 02:55:26,331 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 74 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-28 02:55:26,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 510 flow [2024-06-28 02:55:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:55:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:55:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-28 02:55:26,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-06-28 02:55:26,335 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 185 transitions. [2024-06-28 02:55:26,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 510 flow [2024-06-28 02:55:26,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 482 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 02:55:26,341 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-28 02:55:26,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-28 02:55:26,342 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-28 02:55:26,342 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-28 02:55:26,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2024-06-28 02:55:26,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:26,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:26,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:55:26,343 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:26,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1759136201, now seen corresponding path program 1 times [2024-06-28 02:55:26,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:26,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341925722] [2024-06-28 02:55:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:26,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:27,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:27,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341925722] [2024-06-28 02:55:27,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341925722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:27,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:27,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:27,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415121857] [2024-06-28 02:55:27,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:27,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:27,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:27,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:27,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-28 02:55:27,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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) [2024-06-28 02:55:27,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:27,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-28 02:55:27,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:29,273 INFO L124 PetriNetUnfolderBase]: 11593/16235 cut-off events. [2024-06-28 02:55:29,273 INFO L125 PetriNetUnfolderBase]: For 17147/17147 co-relation queries the response was YES. [2024-06-28 02:55:29,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44938 conditions, 16235 events. 11593/16235 cut-off events. For 17147/17147 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 91769 event pairs, 5796 based on Foata normal form. 8/16070 useless extension candidates. Maximal degree in co-relation 44922. Up to 15582 conditions per place. [2024-06-28 02:55:29,379 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 81 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-28 02:55:29,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 600 flow [2024-06-28 02:55:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-28 02:55:29,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-28 02:55:29,381 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 210 transitions. [2024-06-28 02:55:29,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 600 flow [2024-06-28 02:55:29,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 561 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:29,387 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-28 02:55:29,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-28 02:55:29,388 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-28 02:55:29,388 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-28 02:55:29,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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) [2024-06-28 02:55:29,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:29,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:29,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:55:29,389 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)] === [2024-06-28 02:55:29,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -412079429, now seen corresponding path program 1 times [2024-06-28 02:55:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302128938] [2024-06-28 02:55:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:30,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:30,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302128938] [2024-06-28 02:55:30,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302128938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:30,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:30,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:55:30,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857047688] [2024-06-28 02:55:30,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:30,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:55:30,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:55:30,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:55:30,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:30,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 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) [2024-06-28 02:55:30,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:30,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:30,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:31,788 INFO L124 PetriNetUnfolderBase]: 11584/16279 cut-off events. [2024-06-28 02:55:31,788 INFO L125 PetriNetUnfolderBase]: For 26808/26808 co-relation queries the response was YES. [2024-06-28 02:55:31,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48165 conditions, 16279 events. 11584/16279 cut-off events. For 26808/26808 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 92210 event pairs, 6342 based on Foata normal form. 3/16129 useless extension candidates. Maximal degree in co-relation 48147. Up to 15660 conditions per place. [2024-06-28 02:55:31,874 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 65 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-28 02:55:31,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 511 flow [2024-06-28 02:55:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:55:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:55:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-28 02:55:31,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2024-06-28 02:55:31,875 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 128 transitions. [2024-06-28 02:55:31,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 511 flow [2024-06-28 02:55:31,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 457 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 02:55:31,880 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-28 02:55:31,881 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-28 02:55:31,881 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-28 02:55:31,881 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-28 02:55:31,882 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) [2024-06-28 02:55:31,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:31,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:31,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:55:31,882 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)] === [2024-06-28 02:55:31,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash 110441037, now seen corresponding path program 1 times [2024-06-28 02:55:31,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:31,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990117307] [2024-06-28 02:55:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:32,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990117307] [2024-06-28 02:55:32,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990117307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:32,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:32,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:32,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125666105] [2024-06-28 02:55:32,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:32,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:32,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:32,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-28 02:55:32,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 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) [2024-06-28 02:55:32,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:32,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-28 02:55:32,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:34,919 INFO L124 PetriNetUnfolderBase]: 14044/19484 cut-off events. [2024-06-28 02:55:34,920 INFO L125 PetriNetUnfolderBase]: For 43116/43116 co-relation queries the response was YES. [2024-06-28 02:55:34,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61545 conditions, 19484 events. 14044/19484 cut-off events. For 43116/43116 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 108059 event pairs, 7382 based on Foata normal form. 10/19484 useless extension candidates. Maximal degree in co-relation 61525. Up to 18810 conditions per place. [2024-06-28 02:55:35,083 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 81 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-28 02:55:35,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 712 flow [2024-06-28 02:55:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:55:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:55:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:55:35,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-28 02:55:35,087 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:55:35,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 712 flow [2024-06-28 02:55:35,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 679 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:35,096 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 449 flow [2024-06-28 02:55:35,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-28 02:55:35,097 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-28 02:55:35,097 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 449 flow [2024-06-28 02:55:35,097 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) [2024-06-28 02:55:35,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:35,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:35,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:55:35,097 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)] === [2024-06-28 02:55:35,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1216013710, now seen corresponding path program 1 times [2024-06-28 02:55:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:35,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026157254] [2024-06-28 02:55:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:35,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:36,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:36,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026157254] [2024-06-28 02:55:36,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026157254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:36,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:36,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:36,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131842525] [2024-06-28 02:55:36,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:36,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:36,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:36,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:36,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:36,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 449 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) [2024-06-28 02:55:36,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:36,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:36,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:37,920 INFO L124 PetriNetUnfolderBase]: 13281/18775 cut-off events. [2024-06-28 02:55:37,921 INFO L125 PetriNetUnfolderBase]: For 63770/63794 co-relation queries the response was YES. [2024-06-28 02:55:37,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66049 conditions, 18775 events. 13281/18775 cut-off events. For 63770/63794 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 107684 event pairs, 6756 based on Foata normal form. 11/18636 useless extension candidates. Maximal degree in co-relation 66026. Up to 17841 conditions per place. [2024-06-28 02:55:38,080 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 87 selfloop transitions, 23 changer transitions 0/120 dead transitions. [2024-06-28 02:55:38,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 120 transitions, 883 flow [2024-06-28 02:55:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:55:38,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-28 02:55:38,082 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 449 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:55:38,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 120 transitions, 883 flow [2024-06-28 02:55:38,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 120 transitions, 857 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-28 02:55:38,104 INFO L231 Difference]: Finished difference. Result has 79 places, 93 transitions, 619 flow [2024-06-28 02:55:38,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=619, PETRI_PLACES=79, PETRI_TRANSITIONS=93} [2024-06-28 02:55:38,104 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-28 02:55:38,105 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 93 transitions, 619 flow [2024-06-28 02:55:38,105 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) [2024-06-28 02:55:38,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:38,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:38,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:55:38,105 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)] === [2024-06-28 02:55:38,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -212622596, now seen corresponding path program 2 times [2024-06-28 02:55:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:38,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961785688] [2024-06-28 02:55:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:38,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:39,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:39,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961785688] [2024-06-28 02:55:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961785688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:39,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:39,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:39,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36522962] [2024-06-28 02:55:39,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:39,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:39,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:39,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:39,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:39,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:39,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 93 transitions, 619 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) [2024-06-28 02:55:39,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:39,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:39,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:40,968 INFO L124 PetriNetUnfolderBase]: 13272/18761 cut-off events. [2024-06-28 02:55:40,968 INFO L125 PetriNetUnfolderBase]: For 82626/82640 co-relation queries the response was YES. [2024-06-28 02:55:41,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70393 conditions, 18761 events. 13272/18761 cut-off events. For 82626/82640 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 107764 event pairs, 6749 based on Foata normal form. 3/18615 useless extension candidates. Maximal degree in co-relation 70365. Up to 17864 conditions per place. [2024-06-28 02:55:41,111 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 91 selfloop transitions, 15 changer transitions 0/116 dead transitions. [2024-06-28 02:55:41,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 116 transitions, 891 flow [2024-06-28 02:55:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:55:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:55:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:55:41,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-28 02:55:41,113 INFO L175 Difference]: Start difference. First operand has 79 places, 93 transitions, 619 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:55:41,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 116 transitions, 891 flow [2024-06-28 02:55:41,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 835 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-28 02:55:41,149 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 604 flow [2024-06-28 02:55:41,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=604, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-06-28 02:55:41,149 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-06-28 02:55:41,149 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 604 flow [2024-06-28 02:55:41,150 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) [2024-06-28 02:55:41,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:41,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:41,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:55:41,150 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)] === [2024-06-28 02:55:41,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:41,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1192679774, now seen corresponding path program 3 times [2024-06-28 02:55:41,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:41,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211872037] [2024-06-28 02:55:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:41,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:41,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:41,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211872037] [2024-06-28 02:55:41,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211872037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:41,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:41,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:41,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609872610] [2024-06-28 02:55:41,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:41,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:41,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:41,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:41,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:41,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 604 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) [2024-06-28 02:55:41,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:41,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:41,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:43,955 INFO L124 PetriNetUnfolderBase]: 13335/18851 cut-off events. [2024-06-28 02:55:43,956 INFO L125 PetriNetUnfolderBase]: For 93460/93484 co-relation queries the response was YES. [2024-06-28 02:55:43,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72187 conditions, 18851 events. 13335/18851 cut-off events. For 93460/93484 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 108186 event pairs, 6749 based on Foata normal form. 11/18712 useless extension candidates. Maximal degree in co-relation 72156. Up to 17863 conditions per place. [2024-06-28 02:55:44,060 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 89 selfloop transitions, 49 changer transitions 0/148 dead transitions. [2024-06-28 02:55:44,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 148 transitions, 1136 flow [2024-06-28 02:55:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:55:44,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-28 02:55:44,062 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 604 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:55:44,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 148 transitions, 1136 flow [2024-06-28 02:55:44,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 148 transitions, 1095 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:44,098 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 902 flow [2024-06-28 02:55:44,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-28 02:55:44,099 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-06-28 02:55:44,099 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 902 flow [2024-06-28 02:55:44,099 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) [2024-06-28 02:55:44,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:44,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:44,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:55:44,100 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)] === [2024-06-28 02:55:44,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:44,100 INFO L85 PathProgramCache]: Analyzing trace with hash -958399362, now seen corresponding path program 1 times [2024-06-28 02:55:44,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:44,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87289325] [2024-06-28 02:55:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:44,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:45,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:45,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87289325] [2024-06-28 02:55:45,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87289325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:45,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:45,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:45,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19762675] [2024-06-28 02:55:45,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:45,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:45,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:45,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:45,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 902 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) [2024-06-28 02:55:45,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:45,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:45,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:47,252 INFO L124 PetriNetUnfolderBase]: 13359/18880 cut-off events. [2024-06-28 02:55:47,252 INFO L125 PetriNetUnfolderBase]: For 116377/116393 co-relation queries the response was YES. [2024-06-28 02:55:47,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77229 conditions, 18880 events. 13359/18880 cut-off events. For 116377/116393 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 108234 event pairs, 6603 based on Foata normal form. 3/18733 useless extension candidates. Maximal degree in co-relation 77195. Up to 17926 conditions per place. [2024-06-28 02:55:47,382 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 120 selfloop transitions, 28 changer transitions 0/158 dead transitions. [2024-06-28 02:55:47,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 158 transitions, 1372 flow [2024-06-28 02:55:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-28 02:55:47,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-28 02:55:47,383 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 902 flow. Second operand 7 states and 182 transitions. [2024-06-28 02:55:47,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 158 transitions, 1372 flow [2024-06-28 02:55:47,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 158 transitions, 1289 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:47,427 INFO L231 Difference]: Finished difference. Result has 93 places, 121 transitions, 944 flow [2024-06-28 02:55:47,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=944, PETRI_PLACES=93, PETRI_TRANSITIONS=121} [2024-06-28 02:55:47,428 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-28 02:55:47,428 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 121 transitions, 944 flow [2024-06-28 02:55:47,428 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) [2024-06-28 02:55:47,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:47,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:47,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:55:47,429 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)] === [2024-06-28 02:55:47,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:47,429 INFO L85 PathProgramCache]: Analyzing trace with hash -958279392, now seen corresponding path program 2 times [2024-06-28 02:55:47,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:47,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325387253] [2024-06-28 02:55:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:47,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:48,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325387253] [2024-06-28 02:55:48,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325387253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:48,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:48,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:48,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583844045] [2024-06-28 02:55:48,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:48,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:48,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:48,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:48,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 121 transitions, 944 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) [2024-06-28 02:55:48,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:48,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:48,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:50,397 INFO L124 PetriNetUnfolderBase]: 13381/18912 cut-off events. [2024-06-28 02:55:50,397 INFO L125 PetriNetUnfolderBase]: For 141435/141463 co-relation queries the response was YES. [2024-06-28 02:55:50,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81653 conditions, 18912 events. 13381/18912 cut-off events. For 141435/141463 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 108547 event pairs, 6610 based on Foata normal form. 11/18772 useless extension candidates. Maximal degree in co-relation 81618. Up to 17816 conditions per place. [2024-06-28 02:55:50,559 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 100 selfloop transitions, 57 changer transitions 0/167 dead transitions. [2024-06-28 02:55:50,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 167 transitions, 1558 flow [2024-06-28 02:55:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-28 02:55:50,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-28 02:55:50,561 INFO L175 Difference]: Start difference. First operand has 93 places, 121 transitions, 944 flow. Second operand 7 states and 186 transitions. [2024-06-28 02:55:50,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 167 transitions, 1558 flow [2024-06-28 02:55:50,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 167 transitions, 1465 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 02:55:50,631 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1103 flow [2024-06-28 02:55:50,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1103, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-28 02:55:50,632 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-28 02:55:50,632 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1103 flow [2024-06-28 02:55:50,632 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) [2024-06-28 02:55:50,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:50,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:50,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:55:50,633 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)] === [2024-06-28 02:55:50,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash -958279206, now seen corresponding path program 1 times [2024-06-28 02:55:50,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:50,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711544554] [2024-06-28 02:55:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:51,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:51,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711544554] [2024-06-28 02:55:51,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711544554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:51,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679855936] [2024-06-28 02:55:51,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:51,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:51,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-28 02:55:51,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1103 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) [2024-06-28 02:55:51,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:51,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-28 02:55:51,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:53,862 INFO L124 PetriNetUnfolderBase]: 14427/20062 cut-off events. [2024-06-28 02:55:53,862 INFO L125 PetriNetUnfolderBase]: For 177240/177247 co-relation queries the response was YES. [2024-06-28 02:55:53,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91094 conditions, 20062 events. 14427/20062 cut-off events. For 177240/177247 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 110886 event pairs, 6681 based on Foata normal form. 13/20059 useless extension candidates. Maximal degree in co-relation 91058. Up to 18976 conditions per place. [2024-06-28 02:55:54,049 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 134 selfloop transitions, 58 changer transitions 0/198 dead transitions. [2024-06-28 02:55:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 198 transitions, 2023 flow [2024-06-28 02:55:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-28 02:55:54,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-28 02:55:54,050 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1103 flow. Second operand 7 states and 192 transitions. [2024-06-28 02:55:54,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 198 transitions, 2023 flow [2024-06-28 02:55:54,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 198 transitions, 1934 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:54,157 INFO L231 Difference]: Finished difference. Result has 102 places, 151 transitions, 1445 flow [2024-06-28 02:55:54,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1445, PETRI_PLACES=102, PETRI_TRANSITIONS=151} [2024-06-28 02:55:54,158 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-28 02:55:54,158 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 151 transitions, 1445 flow [2024-06-28 02:55:54,158 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) [2024-06-28 02:55:54,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:54,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:54,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:55:54,159 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)] === [2024-06-28 02:55:54,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:54,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1998872714, now seen corresponding path program 2 times [2024-06-28 02:55:54,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:54,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290625853] [2024-06-28 02:55:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:54,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:54,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290625853] [2024-06-28 02:55:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290625853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:54,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:54,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709880310] [2024-06-28 02:55:54,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:54,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:54,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:55,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-28 02:55:55,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 151 transitions, 1445 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) [2024-06-28 02:55:55,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:55,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-28 02:55:55,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:57,378 INFO L124 PetriNetUnfolderBase]: 14513/20177 cut-off events. [2024-06-28 02:55:57,379 INFO L125 PetriNetUnfolderBase]: For 219792/219795 co-relation queries the response was YES. [2024-06-28 02:55:57,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100236 conditions, 20177 events. 14513/20177 cut-off events. For 219792/219795 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 111580 event pairs, 6887 based on Foata normal form. 12/20173 useless extension candidates. Maximal degree in co-relation 100195. Up to 19432 conditions per place. [2024-06-28 02:55:57,562 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 159 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-28 02:55:57,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 193 transitions, 2106 flow [2024-06-28 02:55:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:55:57,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-28 02:55:57,564 INFO L175 Difference]: Start difference. First operand has 102 places, 151 transitions, 1445 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:55:57,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 193 transitions, 2106 flow [2024-06-28 02:55:57,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 193 transitions, 2028 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-28 02:55:57,701 INFO L231 Difference]: Finished difference. Result has 109 places, 158 transitions, 1539 flow [2024-06-28 02:55:57,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1539, PETRI_PLACES=109, PETRI_TRANSITIONS=158} [2024-06-28 02:55:57,701 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-28 02:55:57,701 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 158 transitions, 1539 flow [2024-06-28 02:55:57,702 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) [2024-06-28 02:55:57,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:57,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:57,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:55:57,702 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)] === [2024-06-28 02:55:57,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1240544748, now seen corresponding path program 3 times [2024-06-28 02:55:57,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:57,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887253528] [2024-06-28 02:55:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:57,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:58,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:58,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887253528] [2024-06-28 02:55:58,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887253528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:58,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:58,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:58,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143934923] [2024-06-28 02:55:58,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:58,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:58,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:58,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:58,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 158 transitions, 1539 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) [2024-06-28 02:55:58,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:58,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:58,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:01,180 INFO L124 PetriNetUnfolderBase]: 13760/19394 cut-off events. [2024-06-28 02:56:01,181 INFO L125 PetriNetUnfolderBase]: For 236629/236777 co-relation queries the response was YES. [2024-06-28 02:56:01,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97784 conditions, 19394 events. 13760/19394 cut-off events. For 236629/236777 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 110657 event pairs, 6340 based on Foata normal form. 7/19231 useless extension candidates. Maximal degree in co-relation 97739. Up to 18412 conditions per place. [2024-06-28 02:56:01,361 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 150 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-06-28 02:56:01,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 189 transitions, 1987 flow [2024-06-28 02:56:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:56:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:56:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:56:01,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-28 02:56:01,363 INFO L175 Difference]: Start difference. First operand has 109 places, 158 transitions, 1539 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:56:01,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 189 transitions, 1987 flow [2024-06-28 02:56:01,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 189 transitions, 1858 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 02:56:01,494 INFO L231 Difference]: Finished difference. Result has 112 places, 158 transitions, 1468 flow [2024-06-28 02:56:01,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1468, PETRI_PLACES=112, PETRI_TRANSITIONS=158} [2024-06-28 02:56:01,495 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-28 02:56:01,495 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 158 transitions, 1468 flow [2024-06-28 02:56:01,495 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) [2024-06-28 02:56:01,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:01,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:01,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:56:01,496 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)] === [2024-06-28 02:56:01,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:01,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1240544562, now seen corresponding path program 3 times [2024-06-28 02:56:01,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:01,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251248695] [2024-06-28 02:56:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:01,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:02,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:02,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251248695] [2024-06-28 02:56:02,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251248695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:02,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:02,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:56:02,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346055300] [2024-06-28 02:56:02,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:02,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:56:02,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:02,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:56:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:56:02,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-28 02:56:02,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 158 transitions, 1468 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) [2024-06-28 02:56:02,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:02,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-28 02:56:02,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:04,983 INFO L124 PetriNetUnfolderBase]: 14528/20197 cut-off events. [2024-06-28 02:56:04,984 INFO L125 PetriNetUnfolderBase]: For 258764/258767 co-relation queries the response was YES. [2024-06-28 02:56:05,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102800 conditions, 20197 events. 14528/20197 cut-off events. For 258764/258767 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 111657 event pairs, 6882 based on Foata normal form. 12/20193 useless extension candidates. Maximal degree in co-relation 102755. Up to 19305 conditions per place. [2024-06-28 02:56:05,201 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 161 selfloop transitions, 40 changer transitions 0/207 dead transitions. [2024-06-28 02:56:05,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 207 transitions, 2303 flow [2024-06-28 02:56:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:56:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:56:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:56:05,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-28 02:56:05,203 INFO L175 Difference]: Start difference. First operand has 112 places, 158 transitions, 1468 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:56:05,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 207 transitions, 2303 flow [2024-06-28 02:56:05,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 207 transitions, 2225 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:05,345 INFO L231 Difference]: Finished difference. Result has 114 places, 167 transitions, 1652 flow [2024-06-28 02:56:05,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1652, PETRI_PLACES=114, PETRI_TRANSITIONS=167} [2024-06-28 02:56:05,345 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-28 02:56:05,346 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 167 transitions, 1652 flow [2024-06-28 02:56:05,346 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) [2024-06-28 02:56:05,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:05,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:05,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:56:05,346 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:56:05,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1240298484, now seen corresponding path program 1 times [2024-06-28 02:56:05,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:05,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630850048] [2024-06-28 02:56:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:05,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:06,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:06,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630850048] [2024-06-28 02:56:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630850048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:06,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:06,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:06,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481161259] [2024-06-28 02:56:06,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:06,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:06,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:06,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:06,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:06,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-28 02:56:06,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 167 transitions, 1652 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) [2024-06-28 02:56:06,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:06,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-28 02:56:06,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:09,717 INFO L124 PetriNetUnfolderBase]: 14548/20221 cut-off events. [2024-06-28 02:56:09,717 INFO L125 PetriNetUnfolderBase]: For 293697/293700 co-relation queries the response was YES. [2024-06-28 02:56:09,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106307 conditions, 20221 events. 14548/20221 cut-off events. For 293697/293700 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 111746 event pairs, 6722 based on Foata normal form. 12/20218 useless extension candidates. Maximal degree in co-relation 106260. Up to 19436 conditions per place. [2024-06-28 02:56:09,862 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 166 selfloop transitions, 34 changer transitions 0/206 dead transitions. [2024-06-28 02:56:09,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 206 transitions, 2342 flow [2024-06-28 02:56:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:56:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:56:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 02:56:09,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-28 02:56:09,864 INFO L175 Difference]: Start difference. First operand has 114 places, 167 transitions, 1652 flow. Second operand 7 states and 181 transitions. [2024-06-28 02:56:09,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 206 transitions, 2342 flow [2024-06-28 02:56:10,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 206 transitions, 2257 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-28 02:56:10,023 INFO L231 Difference]: Finished difference. Result has 118 places, 171 transitions, 1720 flow [2024-06-28 02:56:10,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1720, PETRI_PLACES=118, PETRI_TRANSITIONS=171} [2024-06-28 02:56:10,024 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-28 02:56:10,024 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 171 transitions, 1720 flow [2024-06-28 02:56:10,024 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) [2024-06-28 02:56:10,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:10,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:10,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:56:10,025 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:56:10,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2107362362, now seen corresponding path program 1 times [2024-06-28 02:56:10,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:10,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532321961] [2024-06-28 02:56:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:10,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:10,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532321961] [2024-06-28 02:56:10,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532321961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:10,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:10,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:56:10,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982994224] [2024-06-28 02:56:10,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:10,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:56:10,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:10,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:56:10,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:56:10,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:56:10,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 171 transitions, 1720 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-06-28 02:56:10,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:10,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:56:10,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:13,822 INFO L124 PetriNetUnfolderBase]: 13898/19568 cut-off events. [2024-06-28 02:56:13,822 INFO L125 PetriNetUnfolderBase]: For 320681/320681 co-relation queries the response was YES. [2024-06-28 02:56:13,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106727 conditions, 19568 events. 13898/19568 cut-off events. For 320681/320681 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 110919 event pairs, 6882 based on Foata normal form. 2/19555 useless extension candidates. Maximal degree in co-relation 106678. Up to 18609 conditions per place. [2024-06-28 02:56:13,973 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 150 selfloop transitions, 11 changer transitions 0/184 dead transitions. [2024-06-28 02:56:13,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 184 transitions, 2082 flow [2024-06-28 02:56:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:56:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:56:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-28 02:56:13,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-28 02:56:13,974 INFO L175 Difference]: Start difference. First operand has 118 places, 171 transitions, 1720 flow. Second operand 5 states and 124 transitions. [2024-06-28 02:56:13,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 184 transitions, 2082 flow [2024-06-28 02:56:14,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 184 transitions, 1945 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 02:56:14,149 INFO L231 Difference]: Finished difference. Result has 118 places, 171 transitions, 1614 flow [2024-06-28 02:56:14,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1614, PETRI_PLACES=118, PETRI_TRANSITIONS=171} [2024-06-28 02:56:14,149 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-28 02:56:14,150 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 171 transitions, 1614 flow [2024-06-28 02:56:14,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-06-28 02:56:14,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:14,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:56:14,150 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)] === [2024-06-28 02:56:14,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1804413329, now seen corresponding path program 1 times [2024-06-28 02:56:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054717033] [2024-06-28 02:56:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:15,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:15,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054717033] [2024-06-28 02:56:15,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054717033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:15,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:15,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:15,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731552224] [2024-06-28 02:56:15,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:15,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:15,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:15,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:15,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:15,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:56:15,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 171 transitions, 1614 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 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) [2024-06-28 02:56:15,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:15,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:56:15,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:18,062 INFO L124 PetriNetUnfolderBase]: 13894/19549 cut-off events. [2024-06-28 02:56:18,063 INFO L125 PetriNetUnfolderBase]: For 347544/347650 co-relation queries the response was YES. [2024-06-28 02:56:18,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108191 conditions, 19549 events. 13894/19549 cut-off events. For 347544/347650 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 110898 event pairs, 6271 based on Foata normal form. 17/19451 useless extension candidates. Maximal degree in co-relation 108141. Up to 18389 conditions per place. [2024-06-28 02:56:18,471 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 174 selfloop transitions, 36 changer transitions 0/229 dead transitions. [2024-06-28 02:56:18,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 229 transitions, 2292 flow [2024-06-28 02:56:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:56:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:56:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-28 02:56:18,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48846960167714887 [2024-06-28 02:56:18,473 INFO L175 Difference]: Start difference. First operand has 118 places, 171 transitions, 1614 flow. Second operand 9 states and 233 transitions. [2024-06-28 02:56:18,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 229 transitions, 2292 flow [2024-06-28 02:56:18,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 229 transitions, 2260 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 02:56:18,665 INFO L231 Difference]: Finished difference. Result has 123 places, 175 transitions, 1752 flow [2024-06-28 02:56:18,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1752, PETRI_PLACES=123, PETRI_TRANSITIONS=175} [2024-06-28 02:56:18,667 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-28 02:56:18,667 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 175 transitions, 1752 flow [2024-06-28 02:56:18,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 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) [2024-06-28 02:56:18,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:18,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:18,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:56:18,668 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)] === [2024-06-28 02:56:18,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash 354392298, now seen corresponding path program 1 times [2024-06-28 02:56:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:18,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724055538] [2024-06-28 02:56:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724055538] [2024-06-28 02:56:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724055538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:19,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878386108] [2024-06-28 02:56:19,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:19,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:19,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:19,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-28 02:56:19,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 175 transitions, 1752 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) [2024-06-28 02:56:19,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:19,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-28 02:56:19,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:22,715 INFO L124 PetriNetUnfolderBase]: 14718/20395 cut-off events. [2024-06-28 02:56:22,715 INFO L125 PetriNetUnfolderBase]: For 394822/394825 co-relation queries the response was YES. [2024-06-28 02:56:22,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117335 conditions, 20395 events. 14718/20395 cut-off events. For 394822/394825 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 112200 event pairs, 6589 based on Foata normal form. 12/20396 useless extension candidates. Maximal degree in co-relation 117285. Up to 19603 conditions per place. [2024-06-28 02:56:22,908 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 191 selfloop transitions, 44 changer transitions 0/241 dead transitions. [2024-06-28 02:56:22,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 241 transitions, 2814 flow [2024-06-28 02:56:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-28 02:56:22,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-28 02:56:22,913 INFO L175 Difference]: Start difference. First operand has 123 places, 175 transitions, 1752 flow. Second operand 8 states and 213 transitions. [2024-06-28 02:56:22,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 241 transitions, 2814 flow [2024-06-28 02:56:23,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 241 transitions, 2678 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 02:56:23,135 INFO L231 Difference]: Finished difference. Result has 126 places, 189 transitions, 1964 flow [2024-06-28 02:56:23,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1964, PETRI_PLACES=126, PETRI_TRANSITIONS=189} [2024-06-28 02:56:23,136 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-28 02:56:23,136 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 189 transitions, 1964 flow [2024-06-28 02:56:23,136 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) [2024-06-28 02:56:23,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:23,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:23,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:56:23,137 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)] === [2024-06-28 02:56:23,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash 358116948, now seen corresponding path program 2 times [2024-06-28 02:56:23,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:23,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607548966] [2024-06-28 02:56:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:24,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607548966] [2024-06-28 02:56:24,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607548966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:24,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:24,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388542372] [2024-06-28 02:56:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:24,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-28 02:56:24,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 189 transitions, 1964 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) [2024-06-28 02:56:24,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:24,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-28 02:56:24,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:27,093 INFO L124 PetriNetUnfolderBase]: 15035/20820 cut-off events. [2024-06-28 02:56:27,094 INFO L125 PetriNetUnfolderBase]: For 463771/463783 co-relation queries the response was YES. [2024-06-28 02:56:27,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127377 conditions, 20820 events. 15035/20820 cut-off events. For 463771/463783 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 114441 event pairs, 6371 based on Foata normal form. 16/20822 useless extension candidates. Maximal degree in co-relation 127324. Up to 19144 conditions per place. [2024-06-28 02:56:27,287 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 161 selfloop transitions, 99 changer transitions 0/266 dead transitions. [2024-06-28 02:56:27,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 266 transitions, 3414 flow [2024-06-28 02:56:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-28 02:56:27,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-28 02:56:27,289 INFO L175 Difference]: Start difference. First operand has 126 places, 189 transitions, 1964 flow. Second operand 8 states and 223 transitions. [2024-06-28 02:56:27,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 266 transitions, 3414 flow [2024-06-28 02:56:27,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 266 transitions, 3223 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-28 02:56:27,626 INFO L231 Difference]: Finished difference. Result has 132 places, 208 transitions, 2381 flow [2024-06-28 02:56:27,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2381, PETRI_PLACES=132, PETRI_TRANSITIONS=208} [2024-06-28 02:56:27,627 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-28 02:56:27,627 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 208 transitions, 2381 flow [2024-06-28 02:56:27,627 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) [2024-06-28 02:56:27,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:27,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:27,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:56:27,628 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)] === [2024-06-28 02:56:27,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:27,628 INFO L85 PathProgramCache]: Analyzing trace with hash 358111368, now seen corresponding path program 3 times [2024-06-28 02:56:27,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:27,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077795993] [2024-06-28 02:56:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:27,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:28,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077795993] [2024-06-28 02:56:28,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077795993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:28,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:28,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:28,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162349218] [2024-06-28 02:56:28,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:28,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:28,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-28 02:56:28,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 208 transitions, 2381 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) [2024-06-28 02:56:28,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:28,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-28 02:56:28,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:31,752 INFO L124 PetriNetUnfolderBase]: 15013/20792 cut-off events. [2024-06-28 02:56:31,752 INFO L125 PetriNetUnfolderBase]: For 532089/532101 co-relation queries the response was YES. [2024-06-28 02:56:31,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134166 conditions, 20792 events. 15013/20792 cut-off events. For 532089/532101 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 114303 event pairs, 6390 based on Foata normal form. 16/20794 useless extension candidates. Maximal degree in co-relation 134110. Up to 19133 conditions per place. [2024-06-28 02:56:31,955 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 165 selfloop transitions, 94 changer transitions 0/265 dead transitions. [2024-06-28 02:56:31,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 265 transitions, 3493 flow [2024-06-28 02:56:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-28 02:56:31,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-28 02:56:31,957 INFO L175 Difference]: Start difference. First operand has 132 places, 208 transitions, 2381 flow. Second operand 8 states and 222 transitions. [2024-06-28 02:56:31,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 265 transitions, 3493 flow [2024-06-28 02:56:32,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 265 transitions, 3296 flow, removed 89 selfloop flow, removed 2 redundant places. [2024-06-28 02:56:32,426 INFO L231 Difference]: Finished difference. Result has 138 places, 208 transitions, 2389 flow [2024-06-28 02:56:32,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2389, PETRI_PLACES=138, PETRI_TRANSITIONS=208} [2024-06-28 02:56:32,426 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-28 02:56:32,427 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 208 transitions, 2389 flow [2024-06-28 02:56:32,427 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) [2024-06-28 02:56:32,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:32,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:32,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:56:32,427 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)] === [2024-06-28 02:56:32,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash 358111213, now seen corresponding path program 2 times [2024-06-28 02:56:32,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:32,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992574162] [2024-06-28 02:56:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat