./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-comm.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-comm.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:12:04,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:12:04,602 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:12:04,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:12:04,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:12:04,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:12:04,631 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:12:04,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:12:04,632 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:12:04,635 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:12:04,635 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:12:04,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:12:04,636 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:12:04,637 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:12:04,637 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:12:04,638 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:12:04,638 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:12:04,638 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:12:04,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:12:04,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:12:04,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:12:04,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:12:04,639 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:12:04,639 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:12:04,640 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:12:04,640 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:12:04,640 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:12:04,640 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:12:04,641 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:12:04,641 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:12:04,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:12:04,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:12:04,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:12:04,642 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:12:04,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:12:04,643 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:12:04,643 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:12:04,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:12:04,643 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:12:04,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:12:04,643 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:12:04,644 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:12:04,644 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:12:04,644 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:12:04,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:12:04,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:12:04,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:12:04,836 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:12:04,837 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:12:04,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-comm.wvr.yml/witness.yml [2024-02-07 19:12:04,932 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:12:04,932 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:12:04,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2024-02-07 19:12:05,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:12:06,159 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:12:06,159 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2024-02-07 19:12:06,166 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523f79b6d/8d8e9e92a6444b53bd3cfb2c41f7a1ed/FLAG7e0261d50 [2024-02-07 19:12:06,183 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523f79b6d/8d8e9e92a6444b53bd3cfb2c41f7a1ed [2024-02-07 19:12:06,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:12:06,185 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:12:06,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:12:06,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:12:06,191 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:12:06,192 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:04" (1/2) ... [2024-02-07 19:12:06,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109369 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:06, skipping insertion in model container [2024-02-07 19:12:06,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:04" (1/2) ... [2024-02-07 19:12:06,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@68e14da6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:06, skipping insertion in model container [2024-02-07 19:12:06,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:12:06" (2/2) ... [2024-02-07 19:12:06,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06, skipping insertion in model container [2024-02-07 19:12:06,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:12:06" (2/2) ... [2024-02-07 19:12:06,195 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:12:06,209 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:12:06,213 INFO L76 edCorrectnessWitness]: Location invariant before [L61-L61] ((((0LL - (long long )a) + (long long )b >= 0LL) && ((long long )a + (long long )b >= 0LL)) && ((0LL - (long long )a) - (long long )b >= 0LL)) && ((long long )a - (long long )b >= 0LL) [2024-02-07 19:12:06,229 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:12:06,380 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1936,1949] [2024-02-07 19:12:06,384 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:12:06,394 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 19:12:06,453 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1936,1949] [2024-02-07 19:12:06,454 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:12:06,476 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:12:06,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06 WrapperNode [2024-02-07 19:12:06,477 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:12:06,478 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:12:06,478 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:12:06,478 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:12:06,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,493 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,535 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2024-02-07 19:12:06,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:12:06,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:12:06,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:12:06,537 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:12:06,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,548 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,559 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 19:12:06,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,565 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,566 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,567 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:12:06,570 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:12:06,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:12:06,570 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:12:06,571 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (1/1) ... [2024-02-07 19:12:06,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:12:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:06,601 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) [2024-02-07 19:12:06,618 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 [2024-02-07 19:12:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:12:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:12:06,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:12:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:12:06,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:12:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:12:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:12:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:12:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:12:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:12:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:12:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:12:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:12:06,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:12:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:12:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:12:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:12:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:12:06,633 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:12:06,731 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:12:06,733 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:12:06,898 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:12:06,898 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:12:07,045 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:12:07,045 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 19:12:07,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:12:07 BoogieIcfgContainer [2024-02-07 19:12:07,046 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:12:07,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:12:07,047 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:12:07,059 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:12:07,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:04" (1/4) ... [2024-02-07 19:12:07,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af382df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:12:07, skipping insertion in model container [2024-02-07 19:12:07,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:12:06" (2/4) ... [2024-02-07 19:12:07,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af382df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:12:07, skipping insertion in model container [2024-02-07 19:12:07,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:06" (3/4) ... [2024-02-07 19:12:07,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af382df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:12:07, skipping insertion in model container [2024-02-07 19:12:07,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:12:07" (4/4) ... [2024-02-07 19:12:07,063 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2024-02-07 19:12:07,075 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:12:07,075 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 19:12:07,076 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:12:07,128 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 19:12:07,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-02-07 19:12:07,190 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-02-07 19:12:07,191 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:12:07,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-02-07 19:12:07,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-02-07 19:12:07,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-02-07 19:12:07,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:12:07,216 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;@7af5f29c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:12:07,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-07 19:12:07,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:12:07,219 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 19:12:07,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:12:07,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:07,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 19:12:07,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:07,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash 6722, now seen corresponding path program 1 times [2024-02-07 19:12:07,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:07,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770100115] [2024-02-07 19:12:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:07,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:07,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770100115] [2024-02-07 19:12:07,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770100115] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:07,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:07,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:12:07,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770981550] [2024-02-07 19:12:07,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:07,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:12:07,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:12:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:12:07,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-07 19:12:07,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-02-07 19:12:07,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:07,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-07 19:12:07,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:07,783 INFO L124 PetriNetUnfolderBase]: 40/75 cut-off events. [2024-02-07 19:12:07,783 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 19:12:07,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 75 events. 40/75 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 127 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 74 conditions per place. [2024-02-07 19:12:07,785 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 14 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2024-02-07 19:12:07,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 78 flow [2024-02-07 19:12:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:12:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:12:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2024-02-07 19:12:07,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-02-07 19:12:07,795 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 26 transitions. [2024-02-07 19:12:07,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 78 flow [2024-02-07 19:12:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 70 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 19:12:07,798 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 42 flow [2024-02-07 19:12:07,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2024-02-07 19:12:07,802 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2024-02-07 19:12:07,802 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 42 flow [2024-02-07 19:12:07,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-02-07 19:12:07,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:07,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:07,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:12:07,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:07,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1089556863, now seen corresponding path program 1 times [2024-02-07 19:12:07,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:07,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306774602] [2024-02-07 19:12:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:07,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:07,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306774602] [2024-02-07 19:12:07,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306774602] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:07,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:07,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:12:07,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774964459] [2024-02-07 19:12:07,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:07,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:12:07,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:12:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:12:07,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:07,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2024-02-07 19:12:07,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:07,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:07,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:08,019 INFO L124 PetriNetUnfolderBase]: 74/136 cut-off events. [2024-02-07 19:12:08,020 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:12:08,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 136 events. 74/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 273. Up to 79 conditions per place. [2024-02-07 19:12:08,022 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 24 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2024-02-07 19:12:08,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 29 transitions, 125 flow [2024-02-07 19:12:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:12:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:12:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-02-07 19:12:08,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-02-07 19:12:08,024 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 42 flow. Second operand 3 states and 41 transitions. [2024-02-07 19:12:08,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 29 transitions, 125 flow [2024-02-07 19:12:08,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 121 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:08,027 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 57 flow [2024-02-07 19:12:08,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-02-07 19:12:08,028 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2024-02-07 19:12:08,028 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 57 flow [2024-02-07 19:12:08,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2024-02-07 19:12:08,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:08,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:08,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:12:08,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:08,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1701747972, now seen corresponding path program 1 times [2024-02-07 19:12:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192951921] [2024-02-07 19:12:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:08,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:08,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192951921] [2024-02-07 19:12:08,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192951921] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:08,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735342376] [2024-02-07 19:12:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:08,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:08,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:08,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:08,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:12:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:08,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:12:08,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:08,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735342376] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:08,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:08,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2024-02-07 19:12:08,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658424718] [2024-02-07 19:12:08,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:08,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:12:08,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:12:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:12:08,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:08,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 57 flow. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 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) [2024-02-07 19:12:08,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:08,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:08,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:08,808 INFO L124 PetriNetUnfolderBase]: 76/145 cut-off events. [2024-02-07 19:12:08,809 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-07 19:12:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 145 events. 76/145 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 397 event pairs, 14 based on Foata normal form. 1/146 useless extension candidates. Maximal degree in co-relation 116. Up to 76 conditions per place. [2024-02-07 19:12:08,810 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 26 selfloop transitions, 6 changer transitions 14/47 dead transitions. [2024-02-07 19:12:08,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2024-02-07 19:12:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:12:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:12:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-02-07 19:12:08,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-02-07 19:12:08,811 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 57 flow. Second operand 8 states and 79 transitions. [2024-02-07 19:12:08,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2024-02-07 19:12:08,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:08,812 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 84 flow [2024-02-07 19:12:08,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=84, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2024-02-07 19:12:08,813 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2024-02-07 19:12:08,813 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 84 flow [2024-02-07 19:12:08,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 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) [2024-02-07 19:12:08,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:08,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:08,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:09,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:09,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:09,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1759629352, now seen corresponding path program 2 times [2024-02-07 19:12:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082711332] [2024-02-07 19:12:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:09,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082711332] [2024-02-07 19:12:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082711332] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648089574] [2024-02-07 19:12:09,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:12:09,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:09,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:09,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:09,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:12:09,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:09,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:09,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:12:09,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:09,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:09,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648089574] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:09,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:09,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 11 [2024-02-07 19:12:09,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657295618] [2024-02-07 19:12:09,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:09,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:12:09,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:09,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:12:09,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:12:09,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:09,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 84 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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) [2024-02-07 19:12:09,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:09,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:09,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:09,625 INFO L124 PetriNetUnfolderBase]: 125/236 cut-off events. [2024-02-07 19:12:09,625 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-02-07 19:12:09,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 236 events. 125/236 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 783 event pairs, 19 based on Foata normal form. 3/239 useless extension candidates. Maximal degree in co-relation 623. Up to 96 conditions per place. [2024-02-07 19:12:09,627 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 41 selfloop transitions, 18 changer transitions 12/72 dead transitions. [2024-02-07 19:12:09,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 72 transitions, 371 flow [2024-02-07 19:12:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:12:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:12:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-02-07 19:12:09,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-02-07 19:12:09,628 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 84 flow. Second operand 11 states and 117 transitions. [2024-02-07 19:12:09,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 72 transitions, 371 flow [2024-02-07 19:12:09,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 72 transitions, 354 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-02-07 19:12:09,630 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 184 flow [2024-02-07 19:12:09,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=184, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-02-07 19:12:09,631 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 16 predicate places. [2024-02-07 19:12:09,631 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 184 flow [2024-02-07 19:12:09,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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) [2024-02-07 19:12:09,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:09,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:09,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:09,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-02-07 19:12:09,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:09,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash 55385341, now seen corresponding path program 1 times [2024-02-07 19:12:09,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:09,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184375118] [2024-02-07 19:12:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:09,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184375118] [2024-02-07 19:12:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184375118] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514538058] [2024-02-07 19:12:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:09,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:09,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:10,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:12:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:10,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:12:10,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:10,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:10,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514538058] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:10,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:10,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2024-02-07 19:12:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459205946] [2024-02-07 19:12:10,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:12:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:12:10,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:12:10,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:10,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 184 flow. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 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) [2024-02-07 19:12:10,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:10,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:10,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:10,434 INFO L124 PetriNetUnfolderBase]: 131/251 cut-off events. [2024-02-07 19:12:10,435 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2024-02-07 19:12:10,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 251 events. 131/251 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 885 event pairs, 25 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 783. Up to 191 conditions per place. [2024-02-07 19:12:10,437 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 34 selfloop transitions, 7 changer transitions 14/56 dead transitions. [2024-02-07 19:12:10,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 372 flow [2024-02-07 19:12:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:12:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:12:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2024-02-07 19:12:10,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-02-07 19:12:10,451 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 184 flow. Second operand 8 states and 75 transitions. [2024-02-07 19:12:10,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 372 flow [2024-02-07 19:12:10,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 316 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-02-07 19:12:10,457 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 169 flow [2024-02-07 19:12:10,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=169, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-02-07 19:12:10,459 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2024-02-07 19:12:10,459 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 169 flow [2024-02-07 19:12:10,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 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) [2024-02-07 19:12:10,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:10,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:10,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:10,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:10,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:10,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1323864457, now seen corresponding path program 2 times [2024-02-07 19:12:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:10,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160379161] [2024-02-07 19:12:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:10,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:10,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160379161] [2024-02-07 19:12:10,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160379161] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:10,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131728746] [2024-02-07 19:12:10,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:12:10,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:10,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:10,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:10,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:12:10,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:10,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:10,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:12:10,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:10,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:11,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131728746] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:11,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:11,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2024-02-07 19:12:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154507392] [2024-02-07 19:12:11,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:12:11,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:12:11,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:12:11,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:11,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 169 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 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) [2024-02-07 19:12:11,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:11,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:11,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:11,239 INFO L124 PetriNetUnfolderBase]: 145/272 cut-off events. [2024-02-07 19:12:11,239 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2024-02-07 19:12:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 272 events. 145/272 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 957 event pairs, 27 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 838. Up to 207 conditions per place. [2024-02-07 19:12:11,241 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 44 selfloop transitions, 15 changer transitions 4/64 dead transitions. [2024-02-07 19:12:11,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 402 flow [2024-02-07 19:12:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:12:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:12:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 92 transitions. [2024-02-07 19:12:11,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-02-07 19:12:11,242 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 169 flow. Second operand 10 states and 92 transitions. [2024-02-07 19:12:11,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 402 flow [2024-02-07 19:12:11,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 393 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-02-07 19:12:11,244 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 236 flow [2024-02-07 19:12:11,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=236, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-02-07 19:12:11,245 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 27 predicate places. [2024-02-07 19:12:11,245 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 236 flow [2024-02-07 19:12:11,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 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) [2024-02-07 19:12:11,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:11,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:11,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:11,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:11,457 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:11,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2037639130, now seen corresponding path program 3 times [2024-02-07 19:12:11,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:11,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109421604] [2024-02-07 19:12:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:11,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:11,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109421604] [2024-02-07 19:12:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109421604] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772309492] [2024-02-07 19:12:11,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:12:11,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:11,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:11,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:12:11,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 19:12:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:11,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:12:11,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:11,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:11,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772309492] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:11,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:11,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2024-02-07 19:12:11,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080997795] [2024-02-07 19:12:11,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:11,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:12:11,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:12:11,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:12:11,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:11,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 236 flow. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:11,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:11,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:11,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:11,940 INFO L124 PetriNetUnfolderBase]: 177/328 cut-off events. [2024-02-07 19:12:11,940 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2024-02-07 19:12:11,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 328 events. 177/328 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1237 event pairs, 21 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 1089. Up to 214 conditions per place. [2024-02-07 19:12:11,942 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 43 selfloop transitions, 25 changer transitions 8/77 dead transitions. [2024-02-07 19:12:11,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 524 flow [2024-02-07 19:12:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:12:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:12:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-02-07 19:12:11,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-02-07 19:12:11,944 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 236 flow. Second operand 10 states and 94 transitions. [2024-02-07 19:12:11,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 524 flow [2024-02-07 19:12:11,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 477 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-02-07 19:12:11,946 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 351 flow [2024-02-07 19:12:11,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=351, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-02-07 19:12:11,947 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 34 predicate places. [2024-02-07 19:12:11,947 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 351 flow [2024-02-07 19:12:11,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:11,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:11,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:11,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:12,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:12,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:12,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1790127341, now seen corresponding path program 3 times [2024-02-07 19:12:12,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:12,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485691182] [2024-02-07 19:12:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:12,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:12,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:12,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485691182] [2024-02-07 19:12:12,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485691182] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:12,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708534346] [2024-02-07 19:12:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:12:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:12,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:12,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:12:12,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 19:12:12,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:12,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:12:12,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:12,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:12:12,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708534346] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:12,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:12,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2024-02-07 19:12:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663394730] [2024-02-07 19:12:12,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:12,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:12,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:12,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:12,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 351 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2024-02-07 19:12:12,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:12,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:12,603 INFO L124 PetriNetUnfolderBase]: 193/357 cut-off events. [2024-02-07 19:12:12,603 INFO L125 PetriNetUnfolderBase]: For 768/768 co-relation queries the response was YES. [2024-02-07 19:12:12,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 357 events. 193/357 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1368 event pairs, 53 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1315. Up to 312 conditions per place. [2024-02-07 19:12:12,605 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 54 selfloop transitions, 10 changer transitions 2/67 dead transitions. [2024-02-07 19:12:12,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 548 flow [2024-02-07 19:12:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:12:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:12:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-02-07 19:12:12,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-02-07 19:12:12,606 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 351 flow. Second operand 5 states and 53 transitions. [2024-02-07 19:12:12,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 548 flow [2024-02-07 19:12:12,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 506 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-02-07 19:12:12,610 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 384 flow [2024-02-07 19:12:12,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-02-07 19:12:12,610 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 34 predicate places. [2024-02-07 19:12:12,610 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 384 flow [2024-02-07 19:12:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2024-02-07 19:12:12,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:12,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:12,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:12,823 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:12,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1999686262, now seen corresponding path program 1 times [2024-02-07 19:12:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:12,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430038199] [2024-02-07 19:12:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:13,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430038199] [2024-02-07 19:12:13,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430038199] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717641953] [2024-02-07 19:12:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:13,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:13,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:13,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:13,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 19:12:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:13,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-07 19:12:13,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:13,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717641953] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:13,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:13,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2024-02-07 19:12:13,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692555474] [2024-02-07 19:12:13,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 19:12:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:13,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 19:12:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-02-07 19:12:13,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:13,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 384 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 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) [2024-02-07 19:12:13,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:13,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:18,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:12:18,776 INFO L124 PetriNetUnfolderBase]: 264/508 cut-off events. [2024-02-07 19:12:18,776 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2024-02-07 19:12:18,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 508 events. 264/508 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2302 event pairs, 23 based on Foata normal form. 3/509 useless extension candidates. Maximal degree in co-relation 1868. Up to 220 conditions per place. [2024-02-07 19:12:18,781 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 86 selfloop transitions, 50 changer transitions 35/172 dead transitions. [2024-02-07 19:12:18,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 172 transitions, 1231 flow [2024-02-07 19:12:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-07 19:12:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-07 19:12:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 243 transitions. [2024-02-07 19:12:18,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46285714285714286 [2024-02-07 19:12:18,783 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 384 flow. Second operand 25 states and 243 transitions. [2024-02-07 19:12:18,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 172 transitions, 1231 flow [2024-02-07 19:12:18,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 172 transitions, 1209 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:18,790 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 697 flow [2024-02-07 19:12:18,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=697, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2024-02-07 19:12:18,791 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 66 predicate places. [2024-02-07 19:12:18,804 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 697 flow [2024-02-07 19:12:18,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 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) [2024-02-07 19:12:18,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:18,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:18,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:19,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:19,030 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:19,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1600055690, now seen corresponding path program 2 times [2024-02-07 19:12:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:19,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100985558] [2024-02-07 19:12:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:19,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:19,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100985558] [2024-02-07 19:12:19,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100985558] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:19,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862281043] [2024-02-07 19:12:19,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:12:19,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:19,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:19,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:19,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 19:12:19,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:19,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:19,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-07 19:12:19,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:19,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:20,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862281043] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:20,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2024-02-07 19:12:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471313323] [2024-02-07 19:12:20,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:20,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 19:12:20,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 19:12:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-02-07 19:12:20,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:20,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 697 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-02-07 19:12:20,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:20,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:20,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:21,525 INFO L124 PetriNetUnfolderBase]: 301/613 cut-off events. [2024-02-07 19:12:21,525 INFO L125 PetriNetUnfolderBase]: For 2763/2763 co-relation queries the response was YES. [2024-02-07 19:12:21,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2974 conditions, 613 events. 301/613 cut-off events. For 2763/2763 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3092 event pairs, 19 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 2846. Up to 224 conditions per place. [2024-02-07 19:12:21,529 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 99 selfloop transitions, 79 changer transitions 22/201 dead transitions. [2024-02-07 19:12:21,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 201 transitions, 1845 flow [2024-02-07 19:12:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-07 19:12:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-07 19:12:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 291 transitions. [2024-02-07 19:12:21,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470046082949309 [2024-02-07 19:12:21,531 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 697 flow. Second operand 31 states and 291 transitions. [2024-02-07 19:12:21,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 201 transitions, 1845 flow [2024-02-07 19:12:21,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 201 transitions, 1658 flow, removed 78 selfloop flow, removed 11 redundant places. [2024-02-07 19:12:21,541 INFO L231 Difference]: Finished difference. Result has 110 places, 112 transitions, 1123 flow [2024-02-07 19:12:21,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1123, PETRI_PLACES=110, PETRI_TRANSITIONS=112} [2024-02-07 19:12:21,542 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 87 predicate places. [2024-02-07 19:12:21,542 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 112 transitions, 1123 flow [2024-02-07 19:12:21,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-02-07 19:12:21,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:21,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:21,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:21,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-07 19:12:21,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:21,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash -118288016, now seen corresponding path program 3 times [2024-02-07 19:12:21,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:21,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416265195] [2024-02-07 19:12:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:21,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:22,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416265195] [2024-02-07 19:12:22,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416265195] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352344866] [2024-02-07 19:12:22,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:12:22,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:22,202 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:22,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 19:12:22,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 19:12:22,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:22,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-07 19:12:22,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:22,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352344866] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:22,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:22,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2024-02-07 19:12:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284193846] [2024-02-07 19:12:22,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:22,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 19:12:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 19:12:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-02-07 19:12:23,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:23,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 1123 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-02-07 19:12:23,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:23,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:23,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:24,023 INFO L124 PetriNetUnfolderBase]: 288/573 cut-off events. [2024-02-07 19:12:24,024 INFO L125 PetriNetUnfolderBase]: For 2482/2482 co-relation queries the response was YES. [2024-02-07 19:12:24,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2932 conditions, 573 events. 288/573 cut-off events. For 2482/2482 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2786 event pairs, 19 based on Foata normal form. 3/570 useless extension candidates. Maximal degree in co-relation 2828. Up to 228 conditions per place. [2024-02-07 19:12:24,027 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 85 selfloop transitions, 80 changer transitions 17/183 dead transitions. [2024-02-07 19:12:24,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 183 transitions, 1760 flow [2024-02-07 19:12:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 19:12:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 19:12:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 244 transitions. [2024-02-07 19:12:24,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468864468864469 [2024-02-07 19:12:24,031 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 1123 flow. Second operand 26 states and 244 transitions. [2024-02-07 19:12:24,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 183 transitions, 1760 flow [2024-02-07 19:12:24,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 183 transitions, 1403 flow, removed 158 selfloop flow, removed 14 redundant places. [2024-02-07 19:12:24,046 INFO L231 Difference]: Finished difference. Result has 121 places, 115 transitions, 1026 flow [2024-02-07 19:12:24,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1026, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2024-02-07 19:12:24,046 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 98 predicate places. [2024-02-07 19:12:24,046 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 1026 flow [2024-02-07 19:12:24,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-02-07 19:12:24,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:24,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:24,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:24,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:24,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:24,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1785786684, now seen corresponding path program 4 times [2024-02-07 19:12:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:24,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179212986] [2024-02-07 19:12:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:24,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:24,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:24,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179212986] [2024-02-07 19:12:24,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179212986] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:24,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185497802] [2024-02-07 19:12:24,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:12:24,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:24,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:24,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:24,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-07 19:12:24,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:12:24,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:24,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-07 19:12:24,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:24,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:33,393 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-02-07 19:12:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:33,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185497802] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:33,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:33,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-02-07 19:12:33,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105685497] [2024-02-07 19:12:33,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:33,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 19:12:33,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:33,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 19:12:33,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-02-07 19:12:33,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:33,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 1026 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 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) [2024-02-07 19:12:33,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:33,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:33,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:34,590 INFO L124 PetriNetUnfolderBase]: 366/709 cut-off events. [2024-02-07 19:12:34,590 INFO L125 PetriNetUnfolderBase]: For 2306/2306 co-relation queries the response was YES. [2024-02-07 19:12:34,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 709 events. 366/709 cut-off events. For 2306/2306 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3529 event pairs, 50 based on Foata normal form. 3/694 useless extension candidates. Maximal degree in co-relation 3382. Up to 537 conditions per place. [2024-02-07 19:12:34,598 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 135 selfloop transitions, 46 changer transitions 18/200 dead transitions. [2024-02-07 19:12:34,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 200 transitions, 1976 flow [2024-02-07 19:12:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-07 19:12:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-07 19:12:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 179 transitions. [2024-02-07 19:12:34,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44862155388471175 [2024-02-07 19:12:34,599 INFO L175 Difference]: Start difference. First operand has 121 places, 115 transitions, 1026 flow. Second operand 19 states and 179 transitions. [2024-02-07 19:12:34,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 200 transitions, 1976 flow [2024-02-07 19:12:34,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1741 flow, removed 36 selfloop flow, removed 21 redundant places. [2024-02-07 19:12:34,634 INFO L231 Difference]: Finished difference. Result has 122 places, 148 transitions, 1340 flow [2024-02-07 19:12:34,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1340, PETRI_PLACES=122, PETRI_TRANSITIONS=148} [2024-02-07 19:12:34,635 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 99 predicate places. [2024-02-07 19:12:34,635 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 148 transitions, 1340 flow [2024-02-07 19:12:34,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 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) [2024-02-07 19:12:34,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:34,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:34,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:34,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-07 19:12:34,837 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:34,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:34,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1296389511, now seen corresponding path program 4 times [2024-02-07 19:12:34,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:34,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594245917] [2024-02-07 19:12:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:34,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:34,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:34,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594245917] [2024-02-07 19:12:34,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594245917] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:34,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410120188] [2024-02-07 19:12:34,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:12:34,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:34,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:35,001 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:35,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-07 19:12:35,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:12:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:35,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-07 19:12:35,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:35,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:39,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410120188] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:39,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:39,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2024-02-07 19:12:39,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64438550] [2024-02-07 19:12:39,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:39,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 19:12:39,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:39,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 19:12:39,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=140, Unknown=1, NotChecked=0, Total=210 [2024-02-07 19:12:39,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-07 19:12:39,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 148 transitions, 1340 flow. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 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) [2024-02-07 19:12:39,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:39,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-07 19:12:39,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:39,870 INFO L124 PetriNetUnfolderBase]: 353/691 cut-off events. [2024-02-07 19:12:39,871 INFO L125 PetriNetUnfolderBase]: For 2338/2338 co-relation queries the response was YES. [2024-02-07 19:12:39,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3416 conditions, 691 events. 353/691 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3489 event pairs, 30 based on Foata normal form. 4/675 useless extension candidates. Maximal degree in co-relation 3361. Up to 466 conditions per place. [2024-02-07 19:12:39,875 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 108 selfloop transitions, 50 changer transitions 31/190 dead transitions. [2024-02-07 19:12:39,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 190 transitions, 1933 flow [2024-02-07 19:12:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:12:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:12:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 112 transitions. [2024-02-07 19:12:39,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-02-07 19:12:39,876 INFO L175 Difference]: Start difference. First operand has 122 places, 148 transitions, 1340 flow. Second operand 13 states and 112 transitions. [2024-02-07 19:12:39,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 190 transitions, 1933 flow [2024-02-07 19:12:39,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 190 transitions, 1819 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-02-07 19:12:39,888 INFO L231 Difference]: Finished difference. Result has 131 places, 144 transitions, 1310 flow [2024-02-07 19:12:39,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1310, PETRI_PLACES=131, PETRI_TRANSITIONS=144} [2024-02-07 19:12:39,889 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 108 predicate places. [2024-02-07 19:12:39,889 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 144 transitions, 1310 flow [2024-02-07 19:12:39,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 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) [2024-02-07 19:12:39,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:39,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:39,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:40,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-07 19:12:40,101 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 19:12:40,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:40,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1533087872, now seen corresponding path program 5 times [2024-02-07 19:12:40,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:40,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206451845] [2024-02-07 19:12:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:40,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:40,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:40,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206451845] [2024-02-07 19:12:40,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206451845] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:40,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630498454] [2024-02-07 19:12:40,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:12:40,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:40,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:40,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:40,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-07 19:12:40,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:40,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:40,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-07 19:12:40,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:40,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:12:40,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630498454] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:40,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:12:40,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2024-02-07 19:12:40,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938881081] [2024-02-07 19:12:40,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:40,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:40,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:40,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 19:12:40,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 144 transitions, 1310 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2024-02-07 19:12:40,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:40,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 19:12:40,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:40,652 INFO L124 PetriNetUnfolderBase]: 116/281 cut-off events. [2024-02-07 19:12:40,652 INFO L125 PetriNetUnfolderBase]: For 1925/1925 co-relation queries the response was YES. [2024-02-07 19:12:40,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 281 events. 116/281 cut-off events. For 1925/1925 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1274 event pairs, 79 based on Foata normal form. 62/343 useless extension candidates. Maximal degree in co-relation 1467. Up to 262 conditions per place. [2024-02-07 19:12:40,653 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2024-02-07 19:12:40,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 64 transitions, 759 flow [2024-02-07 19:12:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:12:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:12:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 53 transitions. [2024-02-07 19:12:40,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-02-07 19:12:40,654 INFO L175 Difference]: Start difference. First operand has 131 places, 144 transitions, 1310 flow. Second operand 6 states and 53 transitions. [2024-02-07 19:12:40,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 64 transitions, 759 flow [2024-02-07 19:12:40,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 64 transitions, 620 flow, removed 17 selfloop flow, removed 22 redundant places. [2024-02-07 19:12:40,659 INFO L231 Difference]: Finished difference. Result has 81 places, 0 transitions, 0 flow [2024-02-07 19:12:40,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=81, PETRI_TRANSITIONS=0} [2024-02-07 19:12:40,659 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 58 predicate places. [2024-02-07 19:12:40,659 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 0 transitions, 0 flow [2024-02-07 19:12:40,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2024-02-07 19:12:40,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-02-07 19:12:40,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-07 19:12:40,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-02-07 19:12:40,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-02-07 19:12:40,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:40,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-07 19:12:40,876 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 3, 1, 1] [2024-02-07 19:12:40,879 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 19:12:40,879 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 19:12:40,881 INFO L503 ceAbstractionStarter]: Automizer considered 1 witness invariants [2024-02-07 19:12:40,881 INFO L504 ceAbstractionStarter]: WitnessConsidered=1 [2024-02-07 19:12:40,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 07:12:40 BasicIcfg [2024-02-07 19:12:40,881 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 19:12:40,882 INFO L158 Benchmark]: Toolchain (without parser) took 34697.06ms. Allocated memory was 146.8MB in the beginning and 415.2MB in the end (delta: 268.4MB). Free memory was 71.0MB in the beginning and 302.7MB in the end (delta: -231.8MB). Peak memory consumption was 37.9MB. Max. memory is 16.1GB. [2024-02-07 19:12:40,882 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 146.8MB. Free memory is still 96.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:12:40,882 INFO L158 Benchmark]: CDTParser took 0.07ms. Allocated memory is still 146.8MB. Free memory is still 116.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:12:40,882 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.84ms. Allocated memory is still 146.8MB. Free memory was 70.7MB in the beginning and 115.6MB in the end (delta: -44.9MB). Peak memory consumption was 17.3MB. Max. memory is 16.1GB. [2024-02-07 19:12:40,882 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.01ms. Allocated memory was 146.8MB in the beginning and 207.6MB in the end (delta: 60.8MB). Free memory was 115.6MB in the beginning and 179.2MB in the end (delta: -63.6MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2024-02-07 19:12:40,882 INFO L158 Benchmark]: Boogie Preprocessor took 32.74ms. Allocated memory is still 207.6MB. Free memory was 179.2MB in the beginning and 177.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 19:12:40,883 INFO L158 Benchmark]: RCFGBuilder took 475.94ms. Allocated memory is still 207.6MB. Free memory was 177.1MB in the beginning and 153.0MB in the end (delta: 24.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-02-07 19:12:40,883 INFO L158 Benchmark]: TraceAbstraction took 33834.48ms. Allocated memory was 207.6MB in the beginning and 415.2MB in the end (delta: 207.6MB). Free memory was 151.9MB in the beginning and 302.7MB in the end (delta: -150.8MB). Peak memory consumption was 56.8MB. Max. memory is 16.1GB. [2024-02-07 19:12:40,884 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.14ms. Allocated memory is still 146.8MB. Free memory is still 96.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.07ms. Allocated memory is still 146.8MB. Free memory is still 116.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 289.84ms. Allocated memory is still 146.8MB. Free memory was 70.7MB in the beginning and 115.6MB in the end (delta: -44.9MB). Peak memory consumption was 17.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.01ms. Allocated memory was 146.8MB in the beginning and 207.6MB in the end (delta: 60.8MB). Free memory was 115.6MB in the beginning and 179.2MB in the end (delta: -63.6MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.74ms. Allocated memory is still 207.6MB. Free memory was 179.2MB in the beginning and 177.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 475.94ms. Allocated memory is still 207.6MB. Free memory was 177.1MB in the beginning and 153.0MB in the end (delta: 24.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 33834.48ms. Allocated memory was 207.6MB in the beginning and 415.2MB in the end (delta: 207.6MB). Free memory was 151.9MB in the beginning and 302.7MB in the end (delta: -150.8MB). Peak memory consumption was 56.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33.7s, OverallIterations: 14, TraceHistogramMax: 2, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 10.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 721 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 697 mSDsluCounter, 64 SdHoareTripleChecker+Invalid, 7.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 61 mSDsCounter, 166 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3973 IncrementalHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 166 mSolverCounterUnsat, 3 mSDtfsCounter, 3973 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 490 GetRequests, 265 SyntacticMatches, 16 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1340occurred in iteration=12, InterpolantAutomatonStates: 178, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 19.5s InterpolantComputationTime, 413 NumberOfCodeBlocks, 413 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 557 ConstructedInterpolants, 1 QuantifiedInterpolants, 7661 SizeOfPredicates, 57 NumberOfNonLiveVariables, 1554 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 37 InterpolantComputations, 4 PerfectInterpolantSequences, 3/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-07 19:12:40,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE