./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:55:31,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:55:31,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:55:31,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:55:31,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:55:31,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:55:31,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:55:31,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:55:31,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:55:31,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:55:31,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:55:31,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:55:31,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:55:31,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:55:31,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:55:31,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:55:31,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:55:31,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:55:31,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:55:31,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:55:31,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:55:31,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:55:31,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:55:31,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:55:31,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:55:31,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:55:31,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:55:31,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:55:31,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:55:31,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:55:31,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:55:31,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:55:31,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:55:31,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:55:31,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:55:31,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:55:31,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:55:31,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:55:31,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:55:31,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:55:31,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:55:31,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:55:31,672 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:55:31,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:55:31,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:55:31,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:55:31,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:55:31,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:55:31,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:55:31,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:55:31,676 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:55:31,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:55:31,677 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:55:31,677 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:55:31,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:55:31,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:55:31,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:55:31,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:55:31,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:55:31,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:55:31,678 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:55:31,678 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:55:31,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:55:31,679 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:55:31,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:55:31,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:55:31,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:55:31,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:55:31,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:55:31,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:55:31,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:55:31,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:55:31,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:55:31,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:55:31,681 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:55:31,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:55:31,681 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:55:31,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:55:31,682 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:55:31,682 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:55:31,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:55:32,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:55:32,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:55:32,003 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:55:32,003 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:55:32,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-30 15:55:33,096 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:55:33,291 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:55:33,292 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-30 15:55:33,298 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56c60fd8a/68838079c9534e289adb93844b47b321/FLAG365159541 [2023-08-30 15:55:33,309 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56c60fd8a/68838079c9534e289adb93844b47b321 [2023-08-30 15:55:33,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:55:33,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:55:33,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:55:33,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:55:33,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:55:33,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f54809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33, skipping insertion in model container [2023-08-30 15:55:33,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:55:33,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:55:33,527 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c[2987,3000] [2023-08-30 15:55:33,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:55:33,547 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:55:33,583 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c[2987,3000] [2023-08-30 15:55:33,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:55:33,599 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:55:33,600 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:55:33,605 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:55:33,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33 WrapperNode [2023-08-30 15:55:33,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:55:33,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:55:33,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:55:33,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:55:33,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,668 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 223 [2023-08-30 15:55:33,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:55:33,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:55:33,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:55:33,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:55:33,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,719 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:55:33,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:55:33,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:55:33,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:55:33,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (1/1) ... [2023-08-30 15:55:33,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:55:33,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:33,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 15:55:33,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 15:55:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:55:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:55:33,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:55:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:55:33,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:55:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:55:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:55:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:55:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:55:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:55:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 15:55:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:55:33,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:55:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:55:33,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:55:33,818 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 15:55:33,955 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:55:33,956 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:55:34,336 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:55:34,478 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:55:34,484 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 15:55:34,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:55:34 BoogieIcfgContainer [2023-08-30 15:55:34,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:55:34,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:55:34,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:55:34,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:55:34,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:55:33" (1/3) ... [2023-08-30 15:55:34,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e056a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:55:34, skipping insertion in model container [2023-08-30 15:55:34,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:55:33" (2/3) ... [2023-08-30 15:55:34,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e056a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:55:34, skipping insertion in model container [2023-08-30 15:55:34,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:55:34" (3/3) ... [2023-08-30 15:55:34,494 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2023-08-30 15:55:34,500 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:55:34,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:55:34,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 15:55:34,509 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:55:34,591 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 15:55:34,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 192 transitions, 400 flow [2023-08-30 15:55:34,729 INFO L130 PetriNetUnfolder]: 13/190 cut-off events. [2023-08-30 15:55:34,729 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:55:34,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 190 events. 13/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-30 15:55:34,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 192 transitions, 400 flow [2023-08-30 15:55:34,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 174 transitions, 357 flow [2023-08-30 15:55:34,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:55:34,758 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 174 transitions, 357 flow [2023-08-30 15:55:34,761 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 174 transitions, 357 flow [2023-08-30 15:55:34,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 174 transitions, 357 flow [2023-08-30 15:55:34,817 INFO L130 PetriNetUnfolder]: 12/174 cut-off events. [2023-08-30 15:55:34,817 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:55:34,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 174 events. 12/174 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-30 15:55:34,821 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-30 15:55:41,129 INFO L134 LiptonReduction]: Checked pairs total: 3067 [2023-08-30 15:55:41,129 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-30 15:55:41,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:55:41,145 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@38781ca8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:55:41,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-08-30 15:55:41,147 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 15:55:41,147 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:55:41,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:41,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 15:55:41,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:41,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 27239, now seen corresponding path program 1 times [2023-08-30 15:55:41,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:41,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885673681] [2023-08-30 15:55:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:41,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:41,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885673681] [2023-08-30 15:55:41,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885673681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:41,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:55:41,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:55:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151951036] [2023-08-30 15:55:41,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:41,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:55:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:55:41,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:55:41,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 15:55:41,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2023-08-30 15:55:41,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:41,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 15:55:41,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:41,624 INFO L130 PetriNetUnfolder]: 355/617 cut-off events. [2023-08-30 15:55:41,624 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 15:55:41,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 617 events. 355/617 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2715 event pairs, 288 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 560. Up to 312 conditions per place. [2023-08-30 15:55:41,629 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 49 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-30 15:55:41,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 53 transitions, 230 flow [2023-08-30 15:55:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:55:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:55:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-30 15:55:41,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49232158988256547 [2023-08-30 15:55:41,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-30 15:55:41,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-30 15:55:41,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:41,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-30 15:55:41,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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) [2023-08-30 15:55:41,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:41,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:41,657 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 75 flow. Second operand 3 states and 545 transitions. [2023-08-30 15:55:41,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 53 transitions, 230 flow [2023-08-30 15:55:41,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:55:41,662 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 98 flow [2023-08-30 15:55:41,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2023-08-30 15:55:41,666 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2023-08-30 15:55:41,666 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 98 flow [2023-08-30 15:55:41,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2023-08-30 15:55:41,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:41,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:55:41,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:55:41,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:41,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash 845670, now seen corresponding path program 1 times [2023-08-30 15:55:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:41,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825250035] [2023-08-30 15:55:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:41,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:41,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:41,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825250035] [2023-08-30 15:55:41,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825250035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:41,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:55:41,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:55:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378990341] [2023-08-30 15:55:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:41,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:55:41,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:55:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:55:41,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 15:55:41,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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) [2023-08-30 15:55:41,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:41,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 15:55:41,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:41,898 INFO L130 PetriNetUnfolder]: 355/615 cut-off events. [2023-08-30 15:55:41,898 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 15:55:41,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 615 events. 355/615 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 2735 event pairs, 288 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 627. Up to 615 conditions per place. [2023-08-30 15:55:41,906 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 29 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 15:55:41,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 150 flow [2023-08-30 15:55:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:55:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:55:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-30 15:55:41,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598012646793135 [2023-08-30 15:55:41,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-30 15:55:41,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-30 15:55:41,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:41,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-30 15:55:41,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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) [2023-08-30 15:55:41,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:41,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:41,918 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 98 flow. Second operand 3 states and 509 transitions. [2023-08-30 15:55:41,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 150 flow [2023-08-30 15:55:41,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:55:41,919 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 84 flow [2023-08-30 15:55:41,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2023-08-30 15:55:41,922 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2023-08-30 15:55:41,922 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 84 flow [2023-08-30 15:55:41,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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) [2023-08-30 15:55:41,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:41,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:55:41,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 15:55:41,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:41,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash 845684, now seen corresponding path program 1 times [2023-08-30 15:55:41,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:41,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927872305] [2023-08-30 15:55:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:41,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:42,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:42,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927872305] [2023-08-30 15:55:42,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927872305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:42,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246556208] [2023-08-30 15:55:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:42,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:42,029 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) [2023-08-30 15:55:42,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 15:55:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:55:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:42,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:55:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:42,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246556208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:55:42,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:55:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:55:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516218412] [2023-08-30 15:55:42,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:55:42,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:55:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:55:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:55:42,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 15:55:42,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 84 flow. Second operand has 7 states, 7 states have (on average 161.14285714285714) internal successors, (1128), 7 states have internal predecessors, (1128), 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) [2023-08-30 15:55:42,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:42,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 15:55:42,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:42,615 INFO L130 PetriNetUnfolder]: 886/1533 cut-off events. [2023-08-30 15:55:42,615 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 15:55:42,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3164 conditions, 1533 events. 886/1533 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7907 event pairs, 720 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 3156. Up to 310 conditions per place. [2023-08-30 15:55:42,623 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 110 selfloop transitions, 13 changer transitions 0/123 dead transitions. [2023-08-30 15:55:42,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 123 transitions, 550 flow [2023-08-30 15:55:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:55:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:55:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1089 transitions. [2023-08-30 15:55:42,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2023-08-30 15:55:42,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1089 transitions. [2023-08-30 15:55:42,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1089 transitions. [2023-08-30 15:55:42,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:42,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1089 transitions. [2023-08-30 15:55:42,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.5) internal successors, (1089), 6 states have internal predecessors, (1089), 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) [2023-08-30 15:55:42,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 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) [2023-08-30 15:55:42,636 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 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) [2023-08-30 15:55:42,637 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 84 flow. Second operand 6 states and 1089 transitions. [2023-08-30 15:55:42,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 123 transitions, 550 flow [2023-08-30 15:55:42,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 123 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:55:42,641 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 176 flow [2023-08-30 15:55:42,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-08-30 15:55:42,642 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-30 15:55:42,642 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 176 flow [2023-08-30 15:55:42,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 161.14285714285714) internal successors, (1128), 7 states have internal predecessors, (1128), 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) [2023-08-30 15:55:42,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:42,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:55:42,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 15:55:42,849 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 [2023-08-30 15:55:42,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:42,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash 812911231, now seen corresponding path program 1 times [2023-08-30 15:55:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:42,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53306006] [2023-08-30 15:55:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:42,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:42,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53306006] [2023-08-30 15:55:42,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53306006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:42,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:55:42,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:55:42,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380812632] [2023-08-30 15:55:42,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:42,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:55:42,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:55:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:55:43,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-08-30 15:55:43,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 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) [2023-08-30 15:55:43,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:43,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-08-30 15:55:43,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:43,193 INFO L130 PetriNetUnfolder]: 731/1280 cut-off events. [2023-08-30 15:55:43,193 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 15:55:43,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 1280 events. 731/1280 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6733 event pairs, 597 based on Foata normal form. 6/632 useless extension candidates. Maximal degree in co-relation 2669. Up to 1226 conditions per place. [2023-08-30 15:55:43,200 INFO L137 encePairwiseOnDemand]: 360/369 looper letters, 41 selfloop transitions, 7 changer transitions 2/50 dead transitions. [2023-08-30 15:55:43,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 302 flow [2023-08-30 15:55:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:55:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:55:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 669 transitions. [2023-08-30 15:55:43,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532520325203252 [2023-08-30 15:55:43,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 669 transitions. [2023-08-30 15:55:43,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 669 transitions. [2023-08-30 15:55:43,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:43,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 669 transitions. [2023-08-30 15:55:43,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 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) [2023-08-30 15:55:43,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:55:43,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:55:43,209 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 176 flow. Second operand 4 states and 669 transitions. [2023-08-30 15:55:43,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 302 flow [2023-08-30 15:55:43,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 283 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 15:55:43,212 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 195 flow [2023-08-30 15:55:43,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-08-30 15:55:43,213 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-30 15:55:43,213 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 195 flow [2023-08-30 15:55:43,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 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) [2023-08-30 15:55:43,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:43,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:55:43,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:55:43,214 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:43,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash -568490395, now seen corresponding path program 1 times [2023-08-30 15:55:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:43,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964340778] [2023-08-30 15:55:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:43,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964340778] [2023-08-30 15:55:43,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964340778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:43,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660944851] [2023-08-30 15:55:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:43,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:43,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:43,306 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) [2023-08-30 15:55:43,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 15:55:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:55:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:43,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:55:43,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660944851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:43,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:55:43,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-30 15:55:43,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415064181] [2023-08-30 15:55:43,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:43,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:55:43,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:43,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:55:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:55:43,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2023-08-30 15:55:43,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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) [2023-08-30 15:55:43,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:43,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2023-08-30 15:55:43,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:43,536 INFO L130 PetriNetUnfolder]: 559/988 cut-off events. [2023-08-30 15:55:43,536 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-08-30 15:55:43,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 988 events. 559/988 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4938 event pairs, 441 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 2304. Up to 988 conditions per place. [2023-08-30 15:55:43,542 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 15:55:43,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 263 flow [2023-08-30 15:55:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:55:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:55:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-30 15:55:43,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2023-08-30 15:55:43,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-30 15:55:43,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-30 15:55:43,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:43,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-30 15:55:43,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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) [2023-08-30 15:55:43,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:43,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:43,550 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 195 flow. Second operand 3 states and 519 transitions. [2023-08-30 15:55:43,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 263 flow [2023-08-30 15:55:43,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 255 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 15:55:43,555 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 181 flow [2023-08-30 15:55:43,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-30 15:55:43,558 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-30 15:55:43,560 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 181 flow [2023-08-30 15:55:43,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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) [2023-08-30 15:55:43,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:43,561 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 15:55:43,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 15:55:43,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:43,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:43,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -575196619, now seen corresponding path program 2 times [2023-08-30 15:55:43,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:43,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284233845] [2023-08-30 15:55:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:43,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:43,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284233845] [2023-08-30 15:55:43,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284233845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:43,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124397340] [2023-08-30 15:55:43,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:55:43,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:43,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:43,861 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) [2023-08-30 15:55:43,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 15:55:43,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:55:43,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:55:43,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:55:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:55:43,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:55:43,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124397340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:43,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:55:43,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:55:43,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905976510] [2023-08-30 15:55:43,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:55:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:55:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:55:43,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-08-30 15:55:43,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2023-08-30 15:55:43,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:43,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-08-30 15:55:43,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:44,110 INFO L130 PetriNetUnfolder]: 559/987 cut-off events. [2023-08-30 15:55:44,111 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 15:55:44,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2311 conditions, 987 events. 559/987 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4933 event pairs, 441 based on Foata normal form. 1/584 useless extension candidates. Maximal degree in co-relation 2296. Up to 982 conditions per place. [2023-08-30 15:55:44,116 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 31 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-08-30 15:55:44,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 245 flow [2023-08-30 15:55:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:55:44,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:55:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-30 15:55:44,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46160794941282746 [2023-08-30 15:55:44,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-30 15:55:44,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-30 15:55:44,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:44,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-30 15:55:44,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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) [2023-08-30 15:55:44,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:44,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:44,123 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 181 flow. Second operand 3 states and 511 transitions. [2023-08-30 15:55:44,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 245 flow [2023-08-30 15:55:44,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:55:44,125 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 182 flow [2023-08-30 15:55:44,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-30 15:55:44,126 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-30 15:55:44,126 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 182 flow [2023-08-30 15:55:44,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2023-08-30 15:55:44,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:44,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:44,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 15:55:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:44,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:44,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -443332278, now seen corresponding path program 1 times [2023-08-30 15:55:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488422186] [2023-08-30 15:55:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:44,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488422186] [2023-08-30 15:55:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488422186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:44,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:55:44,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 15:55:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274163628] [2023-08-30 15:55:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 15:55:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 15:55:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:55:44,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 369 [2023-08-30 15:55:44,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 150.16666666666666) internal successors, (901), 6 states have internal predecessors, (901), 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) [2023-08-30 15:55:44,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:44,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 369 [2023-08-30 15:55:44,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:45,005 INFO L130 PetriNetUnfolder]: 628/1171 cut-off events. [2023-08-30 15:55:45,006 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 15:55:45,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2762 conditions, 1171 events. 628/1171 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6287 event pairs, 510 based on Foata normal form. 24/791 useless extension candidates. Maximal degree in co-relation 2746. Up to 986 conditions per place. [2023-08-30 15:55:45,013 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 40 selfloop transitions, 3 changer transitions 11/54 dead transitions. [2023-08-30 15:55:45,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 363 flow [2023-08-30 15:55:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:55:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:55:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-08-30 15:55:45,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276422764227642 [2023-08-30 15:55:45,016 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-08-30 15:55:45,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-08-30 15:55:45,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:45,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-08-30 15:55:45,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 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) [2023-08-30 15:55:45,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 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) [2023-08-30 15:55:45,022 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 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) [2023-08-30 15:55:45,023 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 182 flow. Second operand 5 states and 789 transitions. [2023-08-30 15:55:45,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 363 flow [2023-08-30 15:55:45,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 351 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:55:45,025 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 193 flow [2023-08-30 15:55:45,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-30 15:55:45,026 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-30 15:55:45,026 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 193 flow [2023-08-30 15:55:45,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.16666666666666) internal successors, (901), 6 states have internal predecessors, (901), 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) [2023-08-30 15:55:45,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:45,027 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 15:55:45,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 15:55:45,027 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:45,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:45,027 INFO L85 PathProgramCache]: Analyzing trace with hash -442232376, now seen corresponding path program 1 times [2023-08-30 15:55:45,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:45,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959001145] [2023-08-30 15:55:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:45,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959001145] [2023-08-30 15:55:45,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959001145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743458278] [2023-08-30 15:55:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:45,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:45,101 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) [2023-08-30 15:55:45,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 15:55:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:45,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 15:55:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:45,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:55:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:45,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743458278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:55:45,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:55:45,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 15:55:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052460919] [2023-08-30 15:55:45,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:55:45,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 15:55:45,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:45,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 15:55:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:55:45,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 15:55:45,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 193 flow. Second operand has 13 states, 13 states have (on average 161.15384615384616) internal successors, (2095), 13 states have internal predecessors, (2095), 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) [2023-08-30 15:55:45,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:45,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 15:55:45,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:45,876 INFO L130 PetriNetUnfolder]: 1363/2397 cut-off events. [2023-08-30 15:55:45,876 INFO L131 PetriNetUnfolder]: For 454/454 co-relation queries the response was YES. [2023-08-30 15:55:45,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6481 conditions, 2397 events. 1363/2397 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13274 event pairs, 1071 based on Foata normal form. 12/1563 useless extension candidates. Maximal degree in co-relation 6463. Up to 853 conditions per place. [2023-08-30 15:55:45,890 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 203 selfloop transitions, 31 changer transitions 2/236 dead transitions. [2023-08-30 15:55:45,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 236 transitions, 1401 flow [2023-08-30 15:55:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:55:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:55:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2162 transitions. [2023-08-30 15:55:45,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488256549232159 [2023-08-30 15:55:45,897 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2162 transitions. [2023-08-30 15:55:45,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2162 transitions. [2023-08-30 15:55:45,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:45,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2162 transitions. [2023-08-30 15:55:45,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 180.16666666666666) internal successors, (2162), 12 states have internal predecessors, (2162), 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) [2023-08-30 15:55:45,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 369.0) internal successors, (4797), 13 states have internal predecessors, (4797), 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) [2023-08-30 15:55:45,911 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 369.0) internal successors, (4797), 13 states have internal predecessors, (4797), 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) [2023-08-30 15:55:45,911 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 193 flow. Second operand 12 states and 2162 transitions. [2023-08-30 15:55:45,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 236 transitions, 1401 flow [2023-08-30 15:55:45,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 236 transitions, 1382 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 15:55:45,918 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 396 flow [2023-08-30 15:55:45,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=396, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-08-30 15:55:45,919 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-08-30 15:55:45,919 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 396 flow [2023-08-30 15:55:45,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 161.15384615384616) internal successors, (2095), 13 states have internal predecessors, (2095), 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) [2023-08-30 15:55:45,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:45,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:45,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 15:55:46,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:46,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:46,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1494750123, now seen corresponding path program 1 times [2023-08-30 15:55:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:46,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701974213] [2023-08-30 15:55:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:46,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:55:46,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:46,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701974213] [2023-08-30 15:55:46,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701974213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:46,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:55:46,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:55:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57277788] [2023-08-30 15:55:46,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:46,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:55:46,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:55:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:55:46,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-08-30 15:55:46,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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) [2023-08-30 15:55:46,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:46,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-08-30 15:55:46,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:46,525 INFO L130 PetriNetUnfolder]: 1553/2767 cut-off events. [2023-08-30 15:55:46,525 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-08-30 15:55:46,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7373 conditions, 2767 events. 1553/2767 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16177 event pairs, 555 based on Foata normal form. 80/1981 useless extension candidates. Maximal degree in co-relation 7349. Up to 2133 conditions per place. [2023-08-30 15:55:46,542 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 60 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-08-30 15:55:46,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 545 flow [2023-08-30 15:55:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:55:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:55:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-30 15:55:46,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2023-08-30 15:55:46,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-30 15:55:46,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-30 15:55:46,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:46,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-30 15:55:46,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2023-08-30 15:55:46,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:46,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:46,550 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 396 flow. Second operand 3 states and 522 transitions. [2023-08-30 15:55:46,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 545 flow [2023-08-30 15:55:46,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 455 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-30 15:55:46,554 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 326 flow [2023-08-30 15:55:46,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2023-08-30 15:55:46,556 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-08-30 15:55:46,556 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 326 flow [2023-08-30 15:55:46,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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) [2023-08-30 15:55:46,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:46,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:46,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 15:55:46,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:46,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1461847141, now seen corresponding path program 1 times [2023-08-30 15:55:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:46,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841030018] [2023-08-30 15:55:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:46,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:46,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841030018] [2023-08-30 15:55:46,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841030018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:46,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369800859] [2023-08-30 15:55:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:46,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:46,691 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) [2023-08-30 15:55:46,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 15:55:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:55:46,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:46,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:55:46,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369800859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:46,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:55:46,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 15:55:46,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410384361] [2023-08-30 15:55:46,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:46,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:55:46,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:46,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:55:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:55:46,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2023-08-30 15:55:46,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2023-08-30 15:55:46,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:46,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2023-08-30 15:55:46,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:47,015 INFO L130 PetriNetUnfolder]: 1107/1995 cut-off events. [2023-08-30 15:55:47,016 INFO L131 PetriNetUnfolder]: For 986/986 co-relation queries the response was YES. [2023-08-30 15:55:47,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5835 conditions, 1995 events. 1107/1995 cut-off events. For 986/986 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10731 event pairs, 875 based on Foata normal form. 206/1761 useless extension candidates. Maximal degree in co-relation 5810. Up to 1995 conditions per place. [2023-08-30 15:55:47,031 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 52 selfloop transitions, 1 changer transitions 1/54 dead transitions. [2023-08-30 15:55:47,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 424 flow [2023-08-30 15:55:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:55:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:55:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-30 15:55:47,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2023-08-30 15:55:47,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-30 15:55:47,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-30 15:55:47,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:47,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-30 15:55:47,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2023-08-30 15:55:47,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:47,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:47,038 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 326 flow. Second operand 3 states and 516 transitions. [2023-08-30 15:55:47,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 424 flow [2023-08-30 15:55:47,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 412 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 15:55:47,043 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 298 flow [2023-08-30 15:55:47,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2023-08-30 15:55:47,044 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2023-08-30 15:55:47,045 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 298 flow [2023-08-30 15:55:47,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2023-08-30 15:55:47,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:47,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:47,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 15:55:47,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 15:55:47,251 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:47,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1938747915, now seen corresponding path program 1 times [2023-08-30 15:55:47,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:47,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313272800] [2023-08-30 15:55:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:47,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:55:47,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:47,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313272800] [2023-08-30 15:55:47,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313272800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:47,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:55:47,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:55:47,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383805173] [2023-08-30 15:55:47,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:47,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:55:47,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:55:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:55:47,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-08-30 15:55:47,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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) [2023-08-30 15:55:47,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:47,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-08-30 15:55:47,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:47,618 INFO L130 PetriNetUnfolder]: 1112/2037 cut-off events. [2023-08-30 15:55:47,618 INFO L131 PetriNetUnfolder]: For 516/516 co-relation queries the response was YES. [2023-08-30 15:55:47,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5333 conditions, 2037 events. 1112/2037 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11603 event pairs, 550 based on Foata normal form. 60/1657 useless extension candidates. Maximal degree in co-relation 5308. Up to 1611 conditions per place. [2023-08-30 15:55:47,631 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 56 selfloop transitions, 2 changer transitions 4/62 dead transitions. [2023-08-30 15:55:47,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 447 flow [2023-08-30 15:55:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:55:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:55:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-08-30 15:55:47,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46973803071364045 [2023-08-30 15:55:47,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-08-30 15:55:47,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-08-30 15:55:47,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:47,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-08-30 15:55:47,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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) [2023-08-30 15:55:47,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:47,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:55:47,639 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 298 flow. Second operand 3 states and 520 transitions. [2023-08-30 15:55:47,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 447 flow [2023-08-30 15:55:47,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:55:47,647 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 315 flow [2023-08-30 15:55:47,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-08-30 15:55:47,647 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-08-30 15:55:47,648 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 315 flow [2023-08-30 15:55:47,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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) [2023-08-30 15:55:47,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:47,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 15:55:47,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:47,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:47,649 INFO L85 PathProgramCache]: Analyzing trace with hash -28358383, now seen corresponding path program 1 times [2023-08-30 15:55:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599184782] [2023-08-30 15:55:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:47,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:48,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599184782] [2023-08-30 15:55:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599184782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186782286] [2023-08-30 15:55:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:48,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:48,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:48,073 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) [2023-08-30 15:55:48,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 15:55:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:55:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:55:48,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:55:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186782286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:48,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:55:48,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-08-30 15:55:48,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788296436] [2023-08-30 15:55:48,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:48,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:55:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:55:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:55:48,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-08-30 15:55:48,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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) [2023-08-30 15:55:48,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:48,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-08-30 15:55:48,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:48,541 INFO L130 PetriNetUnfolder]: 1362/2387 cut-off events. [2023-08-30 15:55:48,541 INFO L131 PetriNetUnfolder]: For 946/946 co-relation queries the response was YES. [2023-08-30 15:55:48,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6995 conditions, 2387 events. 1362/2387 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12980 event pairs, 150 based on Foata normal form. 0/1807 useless extension candidates. Maximal degree in co-relation 6968. Up to 1651 conditions per place. [2023-08-30 15:55:48,553 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 60 selfloop transitions, 4 changer transitions 7/71 dead transitions. [2023-08-30 15:55:48,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 516 flow [2023-08-30 15:55:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:55:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:55:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 666 transitions. [2023-08-30 15:55:48,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2023-08-30 15:55:48,556 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 666 transitions. [2023-08-30 15:55:48,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 666 transitions. [2023-08-30 15:55:48,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:48,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 666 transitions. [2023-08-30 15:55:48,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 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) [2023-08-30 15:55:48,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:55:48,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:55:48,561 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 315 flow. Second operand 4 states and 666 transitions. [2023-08-30 15:55:48,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 516 flow [2023-08-30 15:55:48,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 495 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 15:55:48,565 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 328 flow [2023-08-30 15:55:48,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-08-30 15:55:48,566 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-08-30 15:55:48,566 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 328 flow [2023-08-30 15:55:48,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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) [2023-08-30 15:55:48,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:48,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:48,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 15:55:48,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:48,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:48,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash -118446548, now seen corresponding path program 1 times [2023-08-30 15:55:48,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:48,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951749285] [2023-08-30 15:55:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:48,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:49,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951749285] [2023-08-30 15:55:49,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951749285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612892621] [2023-08-30 15:55:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:49,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:49,331 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) [2023-08-30 15:55:49,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 15:55:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:49,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:55:49,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:49,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:55:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:55:49,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:55:49,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:55:49,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:55:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:49,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:55:49,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:55:49,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 15:55:49,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:55:49,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 15:55:49,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-30 15:55:49,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-30 15:55:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:50,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612892621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:55:50,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:55:50,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-30 15:55:50,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979028123] [2023-08-30 15:55:50,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:55:50,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:55:50,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:50,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:55:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2023-08-30 15:55:50,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 369 [2023-08-30 15:55:50,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 328 flow. Second operand has 20 states, 20 states have (on average 118.65) internal successors, (2373), 20 states have internal predecessors, (2373), 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) [2023-08-30 15:55:50,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:50,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 369 [2023-08-30 15:55:50,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:51,935 INFO L130 PetriNetUnfolder]: 1459/2543 cut-off events. [2023-08-30 15:55:51,935 INFO L131 PetriNetUnfolder]: For 1207/1207 co-relation queries the response was YES. [2023-08-30 15:55:51,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7574 conditions, 2543 events. 1459/2543 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14239 event pairs, 535 based on Foata normal form. 0/1907 useless extension candidates. Maximal degree in co-relation 7546. Up to 1992 conditions per place. [2023-08-30 15:55:51,950 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 94 selfloop transitions, 33 changer transitions 15/142 dead transitions. [2023-08-30 15:55:51,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 142 transitions, 945 flow [2023-08-30 15:55:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:55:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:55:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1867 transitions. [2023-08-30 15:55:51,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33730803974706414 [2023-08-30 15:55:51,957 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1867 transitions. [2023-08-30 15:55:51,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1867 transitions. [2023-08-30 15:55:51,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:51,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1867 transitions. [2023-08-30 15:55:51,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 124.46666666666667) internal successors, (1867), 15 states have internal predecessors, (1867), 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) [2023-08-30 15:55:51,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 369.0) internal successors, (5904), 16 states have internal predecessors, (5904), 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) [2023-08-30 15:55:51,982 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 369.0) internal successors, (5904), 16 states have internal predecessors, (5904), 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) [2023-08-30 15:55:51,983 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 328 flow. Second operand 15 states and 1867 transitions. [2023-08-30 15:55:51,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 142 transitions, 945 flow [2023-08-30 15:55:51,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 142 transitions, 926 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:55:51,988 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 492 flow [2023-08-30 15:55:51,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=492, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-30 15:55:51,989 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2023-08-30 15:55:51,989 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 492 flow [2023-08-30 15:55:51,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 118.65) internal successors, (2373), 20 states have internal predecessors, (2373), 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) [2023-08-30 15:55:51,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:51,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:51,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 15:55:52,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:52,196 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:52,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:52,197 INFO L85 PathProgramCache]: Analyzing trace with hash 172004863, now seen corresponding path program 1 times [2023-08-30 15:55:52,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:52,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862007451] [2023-08-30 15:55:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:52,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:53,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862007451] [2023-08-30 15:55:53,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862007451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695769712] [2023-08-30 15:55:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:53,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:53,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:53,059 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) [2023-08-30 15:55:53,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 15:55:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 15:55:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:55:53,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:55:53,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:55:53,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 15:55:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:55:53,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695769712] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:53,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:55:53,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 3] total 11 [2023-08-30 15:55:53,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553759113] [2023-08-30 15:55:53,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:53,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:55:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:55:53,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:55:53,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-08-30 15:55:53,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 492 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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) [2023-08-30 15:55:53,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:53,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-08-30 15:55:53,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:53,700 INFO L130 PetriNetUnfolder]: 1805/3074 cut-off events. [2023-08-30 15:55:53,700 INFO L131 PetriNetUnfolder]: For 4916/4916 co-relation queries the response was YES. [2023-08-30 15:55:53,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10781 conditions, 3074 events. 1805/3074 cut-off events. For 4916/4916 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17324 event pairs, 430 based on Foata normal form. 0/2654 useless extension candidates. Maximal degree in co-relation 10749. Up to 2272 conditions per place. [2023-08-30 15:55:53,719 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 78 selfloop transitions, 12 changer transitions 5/95 dead transitions. [2023-08-30 15:55:53,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 95 transitions, 793 flow [2023-08-30 15:55:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:55:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:55:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 669 transitions. [2023-08-30 15:55:53,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532520325203252 [2023-08-30 15:55:53,722 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 669 transitions. [2023-08-30 15:55:53,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 669 transitions. [2023-08-30 15:55:53,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:53,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 669 transitions. [2023-08-30 15:55:53,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 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) [2023-08-30 15:55:53,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:55:53,726 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:55:53,727 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 492 flow. Second operand 4 states and 669 transitions. [2023-08-30 15:55:53,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 95 transitions, 793 flow [2023-08-30 15:55:53,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 747 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-30 15:55:53,744 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 524 flow [2023-08-30 15:55:53,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-30 15:55:53,745 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2023-08-30 15:55:53,745 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 524 flow [2023-08-30 15:55:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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) [2023-08-30 15:55:53,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:53,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:53,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 15:55:53,952 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,SelfDestructingSolverStorable13 [2023-08-30 15:55:53,953 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:53,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash -28358382, now seen corresponding path program 1 times [2023-08-30 15:55:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:53,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967353406] [2023-08-30 15:55:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:53,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:54,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:54,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967353406] [2023-08-30 15:55:54,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967353406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:54,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217232210] [2023-08-30 15:55:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:54,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:54,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:54,637 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) [2023-08-30 15:55:54,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 15:55:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 15:55:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:54,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:55:54,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:55:54,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 15:55:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:55,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217232210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:55:55,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:55:55,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2023-08-30 15:55:55,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694850404] [2023-08-30 15:55:55,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:55:55,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 15:55:55,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:55,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 15:55:55,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-30 15:55:55,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 369 [2023-08-30 15:55:56,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 524 flow. Second operand has 17 states, 17 states have (on average 136.94117647058823) internal successors, (2328), 17 states have internal predecessors, (2328), 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) [2023-08-30 15:55:56,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:56,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 369 [2023-08-30 15:55:56,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:55:58,393 INFO L130 PetriNetUnfolder]: 5154/8557 cut-off events. [2023-08-30 15:55:58,393 INFO L131 PetriNetUnfolder]: For 22510/22510 co-relation queries the response was YES. [2023-08-30 15:55:58,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34102 conditions, 8557 events. 5154/8557 cut-off events. For 22510/22510 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 55571 event pairs, 434 based on Foata normal form. 382/7665 useless extension candidates. Maximal degree in co-relation 34071. Up to 3265 conditions per place. [2023-08-30 15:55:58,458 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 149 selfloop transitions, 108 changer transitions 22/279 dead transitions. [2023-08-30 15:55:58,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 279 transitions, 2383 flow [2023-08-30 15:55:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 15:55:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 15:55:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3960 transitions. [2023-08-30 15:55:58,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2023-08-30 15:55:58,469 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3960 transitions. [2023-08-30 15:55:58,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3960 transitions. [2023-08-30 15:55:58,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:55:58,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3960 transitions. [2023-08-30 15:55:58,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 141.42857142857142) internal successors, (3960), 28 states have internal predecessors, (3960), 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) [2023-08-30 15:55:58,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 369.0) internal successors, (10701), 29 states have internal predecessors, (10701), 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) [2023-08-30 15:55:58,492 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 369.0) internal successors, (10701), 29 states have internal predecessors, (10701), 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) [2023-08-30 15:55:58,493 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 524 flow. Second operand 28 states and 3960 transitions. [2023-08-30 15:55:58,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 279 transitions, 2383 flow [2023-08-30 15:55:58,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 279 transitions, 2331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:55:58,582 INFO L231 Difference]: Finished difference. Result has 105 places, 180 transitions, 1794 flow [2023-08-30 15:55:58,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1794, PETRI_PLACES=105, PETRI_TRANSITIONS=180} [2023-08-30 15:55:58,583 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2023-08-30 15:55:58,583 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 180 transitions, 1794 flow [2023-08-30 15:55:58,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 136.94117647058823) internal successors, (2328), 17 states have internal predecessors, (2328), 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) [2023-08-30 15:55:58,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:58,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:58,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 15:55:58,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 15:55:58,790 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:55:58,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash -118446549, now seen corresponding path program 2 times [2023-08-30 15:55:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667197884] [2023-08-30 15:55:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:59,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667197884] [2023-08-30 15:55:59,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667197884] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219854211] [2023-08-30 15:55:59,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:55:59,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:59,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:59,309 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) [2023-08-30 15:55:59,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 15:55:59,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:55:59,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:55:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:55:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:55:59,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:55:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:55:59,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:55:59,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219854211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:55:59,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:55:59,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-30 15:55:59,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782150296] [2023-08-30 15:55:59,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:55:59,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:55:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:55:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:55:59,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 369 [2023-08-30 15:55:59,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 180 transitions, 1794 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 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) [2023-08-30 15:55:59,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:59,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 369 [2023-08-30 15:55:59,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:01,065 INFO L130 PetriNetUnfolder]: 5238/8661 cut-off events. [2023-08-30 15:56:01,065 INFO L131 PetriNetUnfolder]: For 40747/40747 co-relation queries the response was YES. [2023-08-30 15:56:01,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43551 conditions, 8661 events. 5238/8661 cut-off events. For 40747/40747 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 55550 event pairs, 560 based on Foata normal form. 0/7635 useless extension candidates. Maximal degree in co-relation 43513. Up to 6203 conditions per place. [2023-08-30 15:56:01,124 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 122 selfloop transitions, 64 changer transitions 5/191 dead transitions. [2023-08-30 15:56:01,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 191 transitions, 2198 flow [2023-08-30 15:56:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:56:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:56:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-08-30 15:56:01,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2023-08-30 15:56:01,127 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-08-30 15:56:01,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-08-30 15:56:01,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:01,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-08-30 15:56:01,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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) [2023-08-30 15:56:01,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:56:01,132 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:56:01,133 INFO L175 Difference]: Start difference. First operand has 105 places, 180 transitions, 1794 flow. Second operand 4 states and 640 transitions. [2023-08-30 15:56:01,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 191 transitions, 2198 flow [2023-08-30 15:56:01,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 191 transitions, 1945 flow, removed 120 selfloop flow, removed 3 redundant places. [2023-08-30 15:56:01,468 INFO L231 Difference]: Finished difference. Result has 106 places, 171 transitions, 1667 flow [2023-08-30 15:56:01,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1667, PETRI_PLACES=106, PETRI_TRANSITIONS=171} [2023-08-30 15:56:01,470 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 70 predicate places. [2023-08-30 15:56:01,470 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 171 transitions, 1667 flow [2023-08-30 15:56:01,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 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) [2023-08-30 15:56:01,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:01,471 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:01,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:01,676 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,SelfDestructingSolverStorable15 [2023-08-30 15:56:01,676 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:01,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2089042070, now seen corresponding path program 2 times [2023-08-30 15:56:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:01,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426575644] [2023-08-30 15:56:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:01,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:56:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:03,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426575644] [2023-08-30 15:56:03,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426575644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:03,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882011459] [2023-08-30 15:56:03,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:56:03,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:03,118 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) [2023-08-30 15:56:03,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 15:56:03,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:56:03,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:56:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 15:56:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 15:56:03,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:56:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882011459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:56:03,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:56:03,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 11 [2023-08-30 15:56:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507567513] [2023-08-30 15:56:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:56:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:56:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:56:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:56:03,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-08-30 15:56:03,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 171 transitions, 1667 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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) [2023-08-30 15:56:03,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:03,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-08-30 15:56:03,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:04,325 INFO L130 PetriNetUnfolder]: 4873/8274 cut-off events. [2023-08-30 15:56:04,325 INFO L131 PetriNetUnfolder]: For 44516/44516 co-relation queries the response was YES. [2023-08-30 15:56:04,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40714 conditions, 8274 events. 4873/8274 cut-off events. For 44516/44516 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 55240 event pairs, 630 based on Foata normal form. 356/7586 useless extension candidates. Maximal degree in co-relation 40675. Up to 6536 conditions per place. [2023-08-30 15:56:04,384 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 148 selfloop transitions, 32 changer transitions 5/185 dead transitions. [2023-08-30 15:56:04,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 185 transitions, 2031 flow [2023-08-30 15:56:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:56:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:56:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 668 transitions. [2023-08-30 15:56:04,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2023-08-30 15:56:04,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 668 transitions. [2023-08-30 15:56:04,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 668 transitions. [2023-08-30 15:56:04,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:04,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 668 transitions. [2023-08-30 15:56:04,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 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) [2023-08-30 15:56:04,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:56:04,398 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:56:04,398 INFO L175 Difference]: Start difference. First operand has 106 places, 171 transitions, 1667 flow. Second operand 4 states and 668 transitions. [2023-08-30 15:56:04,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 185 transitions, 2031 flow [2023-08-30 15:56:04,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 185 transitions, 1954 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 15:56:04,735 INFO L231 Difference]: Finished difference. Result has 103 places, 160 transitions, 1507 flow [2023-08-30 15:56:04,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1507, PETRI_PLACES=103, PETRI_TRANSITIONS=160} [2023-08-30 15:56:04,735 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 67 predicate places. [2023-08-30 15:56:04,736 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 160 transitions, 1507 flow [2023-08-30 15:56:04,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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) [2023-08-30 15:56:04,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:04,736 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:04,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:04,942 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,SelfDestructingSolverStorable16 [2023-08-30 15:56:04,942 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:04,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1998953900, now seen corresponding path program 3 times [2023-08-30 15:56:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789408407] [2023-08-30 15:56:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:06,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:06,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789408407] [2023-08-30 15:56:06,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789408407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:06,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689547520] [2023-08-30 15:56:06,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:56:06,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:06,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:06,317 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) [2023-08-30 15:56:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 15:56:06,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 15:56:06,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:56:06,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:56:06,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:56:06,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:56:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 15:56:06,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:56:06,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689547520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:56:06,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:56:06,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-08-30 15:56:06,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851793186] [2023-08-30 15:56:06,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:56:06,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:56:06,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:56:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-08-30 15:56:06,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 369 [2023-08-30 15:56:06,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 160 transitions, 1507 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 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) [2023-08-30 15:56:06,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:06,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 369 [2023-08-30 15:56:06,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:07,499 INFO L130 PetriNetUnfolder]: 4553/7954 cut-off events. [2023-08-30 15:56:07,499 INFO L131 PetriNetUnfolder]: For 37994/37994 co-relation queries the response was YES. [2023-08-30 15:56:07,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36758 conditions, 7954 events. 4553/7954 cut-off events. For 37994/37994 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 54747 event pairs, 520 based on Foata normal form. 320/7230 useless extension candidates. Maximal degree in co-relation 36721. Up to 5496 conditions per place. [2023-08-30 15:56:07,548 INFO L137 encePairwiseOnDemand]: 365/369 looper letters, 121 selfloop transitions, 48 changer transitions 5/174 dead transitions. [2023-08-30 15:56:07,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 174 transitions, 1874 flow [2023-08-30 15:56:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:56:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:56:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2023-08-30 15:56:07,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2023-08-30 15:56:07,550 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2023-08-30 15:56:07,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2023-08-30 15:56:07,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:07,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2023-08-30 15:56:07,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 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) [2023-08-30 15:56:07,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:56:07,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 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) [2023-08-30 15:56:07,554 INFO L175 Difference]: Start difference. First operand has 103 places, 160 transitions, 1507 flow. Second operand 4 states and 639 transitions. [2023-08-30 15:56:07,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 174 transitions, 1874 flow [2023-08-30 15:56:07,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1793 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:56:07,690 INFO L231 Difference]: Finished difference. Result has 102 places, 154 transitions, 1439 flow [2023-08-30 15:56:07,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1439, PETRI_PLACES=102, PETRI_TRANSITIONS=154} [2023-08-30 15:56:07,690 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2023-08-30 15:56:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 154 transitions, 1439 flow [2023-08-30 15:56:07,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 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) [2023-08-30 15:56:07,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:07,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:07,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:07,896 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,SelfDestructingSolverStorable17 [2023-08-30 15:56:07,896 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:07,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:07,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1504883493, now seen corresponding path program 1 times [2023-08-30 15:56:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:07,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436730862] [2023-08-30 15:56:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:07,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:07,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436730862] [2023-08-30 15:56:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436730862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30329251] [2023-08-30 15:56:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:07,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:07,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:07,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:08,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 15:56:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:08,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:56:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:08,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:08,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30329251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:08,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:08,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 15:56:08,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263827218] [2023-08-30 15:56:08,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:08,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:56:08,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:08,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:56:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:56:08,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 369 [2023-08-30 15:56:08,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 154 transitions, 1439 flow. Second operand has 12 states, 12 states have (on average 152.08333333333334) internal successors, (1825), 12 states have internal predecessors, (1825), 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) [2023-08-30 15:56:08,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:08,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 369 [2023-08-30 15:56:08,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:09,053 INFO L130 PetriNetUnfolder]: 3406/6077 cut-off events. [2023-08-30 15:56:09,053 INFO L131 PetriNetUnfolder]: For 31319/31319 co-relation queries the response was YES. [2023-08-30 15:56:09,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29353 conditions, 6077 events. 3406/6077 cut-off events. For 31319/31319 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 40454 event pairs, 1464 based on Foata normal form. 142/5479 useless extension candidates. Maximal degree in co-relation 29317. Up to 3881 conditions per place. [2023-08-30 15:56:09,086 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 156 selfloop transitions, 12 changer transitions 7/175 dead transitions. [2023-08-30 15:56:09,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 175 transitions, 1958 flow [2023-08-30 15:56:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 15:56:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 15:56:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1554 transitions. [2023-08-30 15:56:09,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211382113821138 [2023-08-30 15:56:09,089 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1554 transitions. [2023-08-30 15:56:09,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1554 transitions. [2023-08-30 15:56:09,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:09,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1554 transitions. [2023-08-30 15:56:09,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.4) internal successors, (1554), 10 states have internal predecessors, (1554), 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) [2023-08-30 15:56:09,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 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) [2023-08-30 15:56:09,095 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 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) [2023-08-30 15:56:09,095 INFO L175 Difference]: Start difference. First operand has 102 places, 154 transitions, 1439 flow. Second operand 10 states and 1554 transitions. [2023-08-30 15:56:09,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 175 transitions, 1958 flow [2023-08-30 15:56:09,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 175 transitions, 1793 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-08-30 15:56:09,173 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1199 flow [2023-08-30 15:56:09,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1199, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2023-08-30 15:56:09,173 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2023-08-30 15:56:09,174 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1199 flow [2023-08-30 15:56:09,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.08333333333334) internal successors, (1825), 12 states have internal predecessors, (1825), 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) [2023-08-30 15:56:09,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:09,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:09,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:09,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:09,375 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:09,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash -452073215, now seen corresponding path program 1 times [2023-08-30 15:56:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:09,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363124720] [2023-08-30 15:56:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:09,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:09,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:09,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363124720] [2023-08-30 15:56:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363124720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:09,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729720045] [2023-08-30 15:56:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:09,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:09,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:09,459 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:09,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 15:56:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:09,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:56:09,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:09,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:09,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729720045] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:09,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:09,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 15:56:09,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287097259] [2023-08-30 15:56:09,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:09,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:56:09,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:56:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:56:09,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 369 [2023-08-30 15:56:09,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1199 flow. Second operand has 12 states, 12 states have (on average 152.41666666666666) internal successors, (1829), 12 states have internal predecessors, (1829), 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) [2023-08-30 15:56:09,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:09,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 369 [2023-08-30 15:56:09,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:10,456 INFO L130 PetriNetUnfolder]: 3230/5811 cut-off events. [2023-08-30 15:56:10,456 INFO L131 PetriNetUnfolder]: For 23025/23025 co-relation queries the response was YES. [2023-08-30 15:56:10,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25742 conditions, 5811 events. 3230/5811 cut-off events. For 23025/23025 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 38743 event pairs, 1619 based on Foata normal form. 26/5163 useless extension candidates. Maximal degree in co-relation 25707. Up to 5452 conditions per place. [2023-08-30 15:56:10,483 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 121 selfloop transitions, 22 changer transitions 17/160 dead transitions. [2023-08-30 15:56:10,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 160 transitions, 1673 flow [2023-08-30 15:56:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:56:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:56:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1098 transitions. [2023-08-30 15:56:10,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2023-08-30 15:56:10,485 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1098 transitions. [2023-08-30 15:56:10,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1098 transitions. [2023-08-30 15:56:10,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:10,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1098 transitions. [2023-08-30 15:56:10,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.85714285714286) internal successors, (1098), 7 states have internal predecessors, (1098), 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) [2023-08-30 15:56:10,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 369.0) internal successors, (2952), 8 states have internal predecessors, (2952), 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) [2023-08-30 15:56:10,489 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 369.0) internal successors, (2952), 8 states have internal predecessors, (2952), 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) [2023-08-30 15:56:10,489 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1199 flow. Second operand 7 states and 1098 transitions. [2023-08-30 15:56:10,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 160 transitions, 1673 flow [2023-08-30 15:56:10,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 160 transitions, 1661 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 15:56:10,523 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 1126 flow [2023-08-30 15:56:10,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1126, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2023-08-30 15:56:10,523 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2023-08-30 15:56:10,524 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 1126 flow [2023-08-30 15:56:10,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.41666666666666) internal successors, (1829), 12 states have internal predecessors, (1829), 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) [2023-08-30 15:56:10,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:10,524 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 15:56:10,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:10,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:10,730 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:10,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2010736648, now seen corresponding path program 2 times [2023-08-30 15:56:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:10,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275862774] [2023-08-30 15:56:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:10,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:56:10,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:10,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275862774] [2023-08-30 15:56:10,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275862774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:10,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637683007] [2023-08-30 15:56:10,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:56:10,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:10,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:10,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:10,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 15:56:10,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:56:10,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:56:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:56:10,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 15:56:11,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:56:11,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637683007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:56:11,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:56:11,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-30 15:56:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347841013] [2023-08-30 15:56:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:56:11,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:56:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:56:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:56:11,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 15:56:11,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 1126 flow. Second operand has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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) [2023-08-30 15:56:11,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:11,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 15:56:11,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:11,638 INFO L130 PetriNetUnfolder]: 3162/5662 cut-off events. [2023-08-30 15:56:11,638 INFO L131 PetriNetUnfolder]: For 23164/23164 co-relation queries the response was YES. [2023-08-30 15:56:11,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25433 conditions, 5662 events. 3162/5662 cut-off events. For 23164/23164 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 37585 event pairs, 1622 based on Foata normal form. 3/4991 useless extension candidates. Maximal degree in co-relation 25397. Up to 5662 conditions per place. [2023-08-30 15:56:11,664 INFO L137 encePairwiseOnDemand]: 367/369 looper letters, 115 selfloop transitions, 1 changer transitions 3/119 dead transitions. [2023-08-30 15:56:11,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 119 transitions, 1307 flow [2023-08-30 15:56:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:56:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:56:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-30 15:56:11,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45347786811201446 [2023-08-30 15:56:11,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-30 15:56:11,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-30 15:56:11,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:11,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-30 15:56:11,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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) [2023-08-30 15:56:11,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:56:11,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2023-08-30 15:56:11,668 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 1126 flow. Second operand 3 states and 502 transitions. [2023-08-30 15:56:11,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 119 transitions, 1307 flow [2023-08-30 15:56:11,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 1187 flow, removed 6 selfloop flow, removed 16 redundant places. [2023-08-30 15:56:11,700 INFO L231 Difference]: Finished difference. Result has 85 places, 116 transitions, 934 flow [2023-08-30 15:56:11,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=934, PETRI_PLACES=85, PETRI_TRANSITIONS=116} [2023-08-30 15:56:11,701 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 49 predicate places. [2023-08-30 15:56:11,701 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 116 transitions, 934 flow [2023-08-30 15:56:11,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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) [2023-08-30 15:56:11,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:11,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:11,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:11,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:11,908 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:11,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:11,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1154182724, now seen corresponding path program 1 times [2023-08-30 15:56:11,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:11,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256034722] [2023-08-30 15:56:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:11,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:56:11,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256034722] [2023-08-30 15:56:11,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256034722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765841192] [2023-08-30 15:56:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:12,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:12,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:12,001 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:12,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 15:56:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:56:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:12,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765841192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:12,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:12,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-30 15:56:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123836208] [2023-08-30 15:56:12,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:56:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:56:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:56:12,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 369 [2023-08-30 15:56:12,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 116 transitions, 934 flow. Second operand has 15 states, 15 states have (on average 150.6) internal successors, (2259), 15 states have internal predecessors, (2259), 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) [2023-08-30 15:56:12,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:12,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 369 [2023-08-30 15:56:12,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:13,436 INFO L130 PetriNetUnfolder]: 4352/7787 cut-off events. [2023-08-30 15:56:13,436 INFO L131 PetriNetUnfolder]: For 25813/25813 co-relation queries the response was YES. [2023-08-30 15:56:13,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34031 conditions, 7787 events. 4352/7787 cut-off events. For 25813/25813 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 53557 event pairs, 972 based on Foata normal form. 198/6981 useless extension candidates. Maximal degree in co-relation 34006. Up to 2657 conditions per place. [2023-08-30 15:56:13,479 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 112 selfloop transitions, 15 changer transitions 60/187 dead transitions. [2023-08-30 15:56:13,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 187 transitions, 1749 flow [2023-08-30 15:56:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:56:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:56:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1412 transitions. [2023-08-30 15:56:13,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251731406202951 [2023-08-30 15:56:13,482 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1412 transitions. [2023-08-30 15:56:13,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1412 transitions. [2023-08-30 15:56:13,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:13,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1412 transitions. [2023-08-30 15:56:13,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 156.88888888888889) internal successors, (1412), 9 states have internal predecessors, (1412), 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) [2023-08-30 15:56:13,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 369.0) internal successors, (3690), 10 states have internal predecessors, (3690), 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) [2023-08-30 15:56:13,486 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 369.0) internal successors, (3690), 10 states have internal predecessors, (3690), 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) [2023-08-30 15:56:13,486 INFO L175 Difference]: Start difference. First operand has 85 places, 116 transitions, 934 flow. Second operand 9 states and 1412 transitions. [2023-08-30 15:56:13,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 187 transitions, 1749 flow [2023-08-30 15:56:13,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 187 transitions, 1734 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 15:56:13,522 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 812 flow [2023-08-30 15:56:13,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=812, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2023-08-30 15:56:13,523 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2023-08-30 15:56:13,523 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 812 flow [2023-08-30 15:56:13,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 150.6) internal successors, (2259), 15 states have internal predecessors, (2259), 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) [2023-08-30 15:56:13,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:13,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:13,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:13,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 15:56:13,730 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:13,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1536144623, now seen corresponding path program 1 times [2023-08-30 15:56:13,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:13,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76774659] [2023-08-30 15:56:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:13,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:56:13,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76774659] [2023-08-30 15:56:13,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76774659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797209779] [2023-08-30 15:56:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:13,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:13,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:13,837 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:13,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 15:56:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:13,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:56:13,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:14,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:14,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797209779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:14,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:14,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 15 [2023-08-30 15:56:14,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157963470] [2023-08-30 15:56:14,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:14,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 15:56:14,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 15:56:14,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-08-30 15:56:14,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 369 [2023-08-30 15:56:14,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 812 flow. Second operand has 17 states, 17 states have (on average 150.2941176470588) internal successors, (2555), 17 states have internal predecessors, (2555), 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) [2023-08-30 15:56:14,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:14,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 369 [2023-08-30 15:56:14,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:15,486 INFO L130 PetriNetUnfolder]: 6176/10732 cut-off events. [2023-08-30 15:56:15,486 INFO L131 PetriNetUnfolder]: For 42053/42053 co-relation queries the response was YES. [2023-08-30 15:56:15,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52672 conditions, 10732 events. 6176/10732 cut-off events. For 42053/42053 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 76323 event pairs, 1758 based on Foata normal form. 460/9176 useless extension candidates. Maximal degree in co-relation 52644. Up to 4851 conditions per place. [2023-08-30 15:56:15,546 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 90 selfloop transitions, 37 changer transitions 36/163 dead transitions. [2023-08-30 15:56:15,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 163 transitions, 1611 flow [2023-08-30 15:56:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 15:56:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 15:56:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1562 transitions. [2023-08-30 15:56:15,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233062330623306 [2023-08-30 15:56:15,548 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1562 transitions. [2023-08-30 15:56:15,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1562 transitions. [2023-08-30 15:56:15,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:15,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1562 transitions. [2023-08-30 15:56:15,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.2) internal successors, (1562), 10 states have internal predecessors, (1562), 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) [2023-08-30 15:56:15,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 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) [2023-08-30 15:56:15,552 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 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) [2023-08-30 15:56:15,552 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 812 flow. Second operand 10 states and 1562 transitions. [2023-08-30 15:56:15,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 163 transitions, 1611 flow [2023-08-30 15:56:15,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 163 transitions, 1541 flow, removed 30 selfloop flow, removed 7 redundant places. [2023-08-30 15:56:15,604 INFO L231 Difference]: Finished difference. Result has 82 places, 98 transitions, 935 flow [2023-08-30 15:56:15,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=935, PETRI_PLACES=82, PETRI_TRANSITIONS=98} [2023-08-30 15:56:15,604 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 46 predicate places. [2023-08-30 15:56:15,604 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 98 transitions, 935 flow [2023-08-30 15:56:15,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 150.2941176470588) internal successors, (2555), 17 states have internal predecessors, (2555), 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) [2023-08-30 15:56:15,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:15,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:15,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 15:56:15,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:15,810 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:15,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:15,810 INFO L85 PathProgramCache]: Analyzing trace with hash -209386565, now seen corresponding path program 1 times [2023-08-30 15:56:15,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:15,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024574908] [2023-08-30 15:56:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:16,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:16,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024574908] [2023-08-30 15:56:16,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024574908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:16,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397936966] [2023-08-30 15:56:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:16,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:16,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:16,313 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:16,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 15:56:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:16,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 15:56:16,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:16,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:16,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:16,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 15:56:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397936966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:16,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2023-08-30 15:56:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796203947] [2023-08-30 15:56:16,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:16,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 15:56:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 15:56:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2023-08-30 15:56:17,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 369 [2023-08-30 15:56:17,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 98 transitions, 935 flow. Second operand has 28 states, 28 states have (on average 139.67857142857142) internal successors, (3911), 28 states have internal predecessors, (3911), 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) [2023-08-30 15:56:17,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:17,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 369 [2023-08-30 15:56:17,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:19,678 INFO L130 PetriNetUnfolder]: 8438/14942 cut-off events. [2023-08-30 15:56:19,678 INFO L131 PetriNetUnfolder]: For 82920/82920 co-relation queries the response was YES. [2023-08-30 15:56:19,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80081 conditions, 14942 events. 8438/14942 cut-off events. For 82920/82920 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 114256 event pairs, 1235 based on Foata normal form. 686/12594 useless extension candidates. Maximal degree in co-relation 80054. Up to 4688 conditions per place. [2023-08-30 15:56:19,787 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 187 selfloop transitions, 104 changer transitions 27/318 dead transitions. [2023-08-30 15:56:19,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 318 transitions, 3346 flow [2023-08-30 15:56:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 15:56:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 15:56:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3935 transitions. [2023-08-30 15:56:19,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949613570209776 [2023-08-30 15:56:19,791 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3935 transitions. [2023-08-30 15:56:19,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3935 transitions. [2023-08-30 15:56:19,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:19,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3935 transitions. [2023-08-30 15:56:19,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 145.74074074074073) internal successors, (3935), 27 states have internal predecessors, (3935), 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) [2023-08-30 15:56:19,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 369.0) internal successors, (10332), 28 states have internal predecessors, (10332), 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) [2023-08-30 15:56:19,800 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 369.0) internal successors, (10332), 28 states have internal predecessors, (10332), 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) [2023-08-30 15:56:19,800 INFO L175 Difference]: Start difference. First operand has 82 places, 98 transitions, 935 flow. Second operand 27 states and 3935 transitions. [2023-08-30 15:56:19,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 318 transitions, 3346 flow [2023-08-30 15:56:19,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 318 transitions, 3233 flow, removed 50 selfloop flow, removed 5 redundant places. [2023-08-30 15:56:19,898 INFO L231 Difference]: Finished difference. Result has 105 places, 157 transitions, 1960 flow [2023-08-30 15:56:19,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1960, PETRI_PLACES=105, PETRI_TRANSITIONS=157} [2023-08-30 15:56:19,898 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2023-08-30 15:56:19,899 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 157 transitions, 1960 flow [2023-08-30 15:56:19,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 139.67857142857142) internal successors, (3911), 28 states have internal predecessors, (3911), 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) [2023-08-30 15:56:19,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:19,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:19,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:20,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:20,101 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:20,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:20,101 INFO L85 PathProgramCache]: Analyzing trace with hash -212067755, now seen corresponding path program 2 times [2023-08-30 15:56:20,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:20,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990541520] [2023-08-30 15:56:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:20,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:20,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990541520] [2023-08-30 15:56:20,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990541520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818012085] [2023-08-30 15:56:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:56:20,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:20,487 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:20,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 15:56:20,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:56:20,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:56:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:56:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:20,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:56:20,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:56:20,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:56:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:56:20,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:56:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:20,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:21,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:21,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 15:56:21,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:21,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 15:56:21,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-30 15:56:21,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-30 15:56:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818012085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:21,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:21,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 15:56:21,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588253895] [2023-08-30 15:56:21,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:56:21,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:21,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:56:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=610, Unknown=1, NotChecked=0, Total=702 [2023-08-30 15:56:22,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 369 [2023-08-30 15:56:22,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 157 transitions, 1960 flow. Second operand has 27 states, 27 states have (on average 112.77777777777777) internal successors, (3045), 27 states have internal predecessors, (3045), 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) [2023-08-30 15:56:22,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:22,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 369 [2023-08-30 15:56:22,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:26,744 INFO L130 PetriNetUnfolder]: 8770/15532 cut-off events. [2023-08-30 15:56:26,745 INFO L131 PetriNetUnfolder]: For 119142/119142 co-relation queries the response was YES. [2023-08-30 15:56:26,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92059 conditions, 15532 events. 8770/15532 cut-off events. For 119142/119142 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 118842 event pairs, 2322 based on Foata normal form. 190/13272 useless extension candidates. Maximal degree in co-relation 92025. Up to 11886 conditions per place. [2023-08-30 15:56:26,839 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 291 selfloop transitions, 98 changer transitions 36/425 dead transitions. [2023-08-30 15:56:26,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 425 transitions, 5531 flow [2023-08-30 15:56:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 15:56:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 15:56:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3322 transitions. [2023-08-30 15:56:26,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32152535811072397 [2023-08-30 15:56:26,842 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3322 transitions. [2023-08-30 15:56:26,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3322 transitions. [2023-08-30 15:56:26,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:26,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3322 transitions. [2023-08-30 15:56:26,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 118.64285714285714) internal successors, (3322), 28 states have internal predecessors, (3322), 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) [2023-08-30 15:56:26,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 369.0) internal successors, (10701), 29 states have internal predecessors, (10701), 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) [2023-08-30 15:56:26,851 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 369.0) internal successors, (10701), 29 states have internal predecessors, (10701), 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) [2023-08-30 15:56:26,851 INFO L175 Difference]: Start difference. First operand has 105 places, 157 transitions, 1960 flow. Second operand 28 states and 3322 transitions. [2023-08-30 15:56:26,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 425 transitions, 5531 flow [2023-08-30 15:56:27,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 425 transitions, 4816 flow, removed 220 selfloop flow, removed 9 redundant places. [2023-08-30 15:56:27,250 INFO L231 Difference]: Finished difference. Result has 133 places, 209 transitions, 2582 flow [2023-08-30 15:56:27,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2582, PETRI_PLACES=133, PETRI_TRANSITIONS=209} [2023-08-30 15:56:27,250 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 97 predicate places. [2023-08-30 15:56:27,250 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 209 transitions, 2582 flow [2023-08-30 15:56:27,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 112.77777777777777) internal successors, (3045), 27 states have internal predecessors, (3045), 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) [2023-08-30 15:56:27,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:27,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:27,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:27,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:27,456 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:27,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash -212067756, now seen corresponding path program 1 times [2023-08-30 15:56:27,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:27,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248100288] [2023-08-30 15:56:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:27,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:56:27,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248100288] [2023-08-30 15:56:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248100288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402934955] [2023-08-30 15:56:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:27,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:27,957 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:27,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 15:56:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 15:56:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 15:56:28,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:28,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:28,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-30 15:56:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 15:56:28,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402934955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:28,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:28,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 3] total 12 [2023-08-30 15:56:28,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243997576] [2023-08-30 15:56:28,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 15:56:28,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 15:56:28,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:56:28,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 369 [2023-08-30 15:56:28,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 209 transitions, 2582 flow. Second operand has 14 states, 14 states have (on average 145.35714285714286) internal successors, (2035), 14 states have internal predecessors, (2035), 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) [2023-08-30 15:56:28,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:28,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 369 [2023-08-30 15:56:28,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:30,611 INFO L130 PetriNetUnfolder]: 8147/14691 cut-off events. [2023-08-30 15:56:30,611 INFO L131 PetriNetUnfolder]: For 128597/128597 co-relation queries the response was YES. [2023-08-30 15:56:30,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84484 conditions, 14691 events. 8147/14691 cut-off events. For 128597/128597 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 112640 event pairs, 2244 based on Foata normal form. 0/13403 useless extension candidates. Maximal degree in co-relation 84441. Up to 4957 conditions per place. [2023-08-30 15:56:30,718 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 144 selfloop transitions, 105 changer transitions 29/278 dead transitions. [2023-08-30 15:56:30,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 278 transitions, 3546 flow [2023-08-30 15:56:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 15:56:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 15:56:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2559 transitions. [2023-08-30 15:56:30,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40793878527020566 [2023-08-30 15:56:30,721 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2559 transitions. [2023-08-30 15:56:30,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2559 transitions. [2023-08-30 15:56:30,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:30,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2559 transitions. [2023-08-30 15:56:30,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 150.52941176470588) internal successors, (2559), 17 states have internal predecessors, (2559), 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) [2023-08-30 15:56:30,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 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) [2023-08-30 15:56:30,729 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 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) [2023-08-30 15:56:30,729 INFO L175 Difference]: Start difference. First operand has 133 places, 209 transitions, 2582 flow. Second operand 17 states and 2559 transitions. [2023-08-30 15:56:30,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 278 transitions, 3546 flow [2023-08-30 15:56:31,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 278 transitions, 3486 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-30 15:56:31,196 INFO L231 Difference]: Finished difference. Result has 143 places, 182 transitions, 2402 flow [2023-08-30 15:56:31,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2402, PETRI_PLACES=143, PETRI_TRANSITIONS=182} [2023-08-30 15:56:31,196 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 107 predicate places. [2023-08-30 15:56:31,196 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 182 transitions, 2402 flow [2023-08-30 15:56:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.35714285714286) internal successors, (2035), 14 states have internal predecessors, (2035), 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) [2023-08-30 15:56:31,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:31,197 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:31,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:31,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 15:56:31,397 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:31,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash -872234095, now seen corresponding path program 3 times [2023-08-30 15:56:31,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414770956] [2023-08-30 15:56:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:56:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414770956] [2023-08-30 15:56:32,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414770956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953396716] [2023-08-30 15:56:32,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:56:32,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:32,455 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:32,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 15:56:32,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:56:32,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:56:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:56:32,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 15:56:32,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:32,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:32,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 15:56:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 15:56:32,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953396716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:32,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:32,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 20 [2023-08-30 15:56:32,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143022650] [2023-08-30 15:56:32,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:32,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:56:32,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:56:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-08-30 15:56:34,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 369 [2023-08-30 15:56:34,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 182 transitions, 2402 flow. Second operand has 22 states, 22 states have (on average 134.72727272727272) internal successors, (2964), 22 states have internal predecessors, (2964), 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) [2023-08-30 15:56:34,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:34,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 369 [2023-08-30 15:56:34,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:36,694 INFO L130 PetriNetUnfolder]: 7984/14416 cut-off events. [2023-08-30 15:56:36,694 INFO L131 PetriNetUnfolder]: For 159713/159713 co-relation queries the response was YES. [2023-08-30 15:56:36,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85743 conditions, 14416 events. 7984/14416 cut-off events. For 159713/159713 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 111317 event pairs, 2079 based on Foata normal form. 518/13736 useless extension candidates. Maximal degree in co-relation 85698. Up to 4813 conditions per place. [2023-08-30 15:56:36,791 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 166 selfloop transitions, 201 changer transitions 32/399 dead transitions. [2023-08-30 15:56:36,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 399 transitions, 5627 flow [2023-08-30 15:56:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:56:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:56:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3075 transitions. [2023-08-30 15:56:36,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2023-08-30 15:56:36,795 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3075 transitions. [2023-08-30 15:56:36,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3075 transitions. [2023-08-30 15:56:36,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:36,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3075 transitions. [2023-08-30 15:56:36,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 139.77272727272728) internal successors, (3075), 22 states have internal predecessors, (3075), 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) [2023-08-30 15:56:36,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 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) [2023-08-30 15:56:36,804 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 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) [2023-08-30 15:56:36,805 INFO L175 Difference]: Start difference. First operand has 143 places, 182 transitions, 2402 flow. Second operand 22 states and 3075 transitions. [2023-08-30 15:56:36,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 399 transitions, 5627 flow [2023-08-30 15:56:37,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 399 transitions, 5479 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-30 15:56:37,110 INFO L231 Difference]: Finished difference. Result has 162 places, 287 transitions, 4494 flow [2023-08-30 15:56:37,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4494, PETRI_PLACES=162, PETRI_TRANSITIONS=287} [2023-08-30 15:56:37,111 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 126 predicate places. [2023-08-30 15:56:37,111 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 287 transitions, 4494 flow [2023-08-30 15:56:37,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 134.72727272727272) internal successors, (2964), 22 states have internal predecessors, (2964), 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) [2023-08-30 15:56:37,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:56:37,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:56:37,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 15:56:37,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 15:56:37,318 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:56:37,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:56:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash -211808290, now seen corresponding path program 1 times [2023-08-30 15:56:37,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:56:37,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286263940] [2023-08-30 15:56:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:37,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:56:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:56:38,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:56:38,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286263940] [2023-08-30 15:56:38,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286263940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:56:38,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148003230] [2023-08-30 15:56:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:56:38,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:56:38,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:56:38,989 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:56:38,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 15:56:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:56:39,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 15:56:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:56:39,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:56:39,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:56:39,130 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 15:56:39,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 15:56:39,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:56:39,268 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 15:56:39,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 15:56:39,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 15:56:39,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 15:56:39,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 15:56:39,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 15:56:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:39,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:56:40,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:40,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2023-08-30 15:56:40,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:40,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 293 [2023-08-30 15:56:40,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:40,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 237 [2023-08-30 15:56:40,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:40,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 209 [2023-08-30 15:56:40,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:56:40,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 101 [2023-08-30 15:56:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:56:41,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148003230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:56:41,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:56:41,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 34 [2023-08-30 15:56:41,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187467451] [2023-08-30 15:56:41,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:56:41,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:56:41,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:56:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:56:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1062, Unknown=14, NotChecked=0, Total=1260 [2023-08-30 15:56:42,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 369 [2023-08-30 15:56:42,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 287 transitions, 4494 flow. Second operand has 36 states, 36 states have (on average 93.41666666666667) internal successors, (3363), 36 states have internal predecessors, (3363), 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) [2023-08-30 15:56:42,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:56:42,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 369 [2023-08-30 15:56:42,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:50,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:56:52,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:56:58,571 INFO L130 PetriNetUnfolder]: 16619/29586 cut-off events. [2023-08-30 15:56:58,571 INFO L131 PetriNetUnfolder]: For 332567/332567 co-relation queries the response was YES. [2023-08-30 15:56:58,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181558 conditions, 29586 events. 16619/29586 cut-off events. For 332567/332567 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 252254 event pairs, 2831 based on Foata normal form. 20/27332 useless extension candidates. Maximal degree in co-relation 181505. Up to 14259 conditions per place. [2023-08-30 15:56:58,825 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 488 selfloop transitions, 107 changer transitions 36/631 dead transitions. [2023-08-30 15:56:58,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 631 transitions, 10116 flow [2023-08-30 15:56:58,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 15:56:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 15:56:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3440 transitions. [2023-08-30 15:56:58,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26635694928377857 [2023-08-30 15:56:58,829 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3440 transitions. [2023-08-30 15:56:58,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3440 transitions. [2023-08-30 15:56:58,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:58,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3440 transitions. [2023-08-30 15:56:58,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 98.28571428571429) internal successors, (3440), 35 states have internal predecessors, (3440), 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) [2023-08-30 15:56:58,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 369.0) internal successors, (13284), 36 states have internal predecessors, (13284), 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) [2023-08-30 15:56:58,842 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 369.0) internal successors, (13284), 36 states have internal predecessors, (13284), 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) [2023-08-30 15:56:58,842 INFO L175 Difference]: Start difference. First operand has 162 places, 287 transitions, 4494 flow. Second operand 35 states and 3440 transitions. [2023-08-30 15:56:58,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 631 transitions, 10116 flow [2023-08-30 15:57:00,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 631 transitions, 9895 flow, removed 103 selfloop flow, removed 3 redundant places. [2023-08-30 15:57:00,981 INFO L231 Difference]: Finished difference. Result has 207 places, 370 transitions, 6036 flow [2023-08-30 15:57:00,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6036, PETRI_PLACES=207, PETRI_TRANSITIONS=370} [2023-08-30 15:57:00,981 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 171 predicate places. [2023-08-30 15:57:00,981 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 370 transitions, 6036 flow [2023-08-30 15:57:00,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 93.41666666666667) internal successors, (3363), 36 states have internal predecessors, (3363), 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) [2023-08-30 15:57:00,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:57:00,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:57:00,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-30 15:57:01,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 15:57:01,188 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:57:01,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:57:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash -215319969, now seen corresponding path program 1 times [2023-08-30 15:57:01,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:57:01,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832842931] [2023-08-30 15:57:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:57:01,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:57:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:57:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:57:02,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:57:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832842931] [2023-08-30 15:57:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832842931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:57:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250259156] [2023-08-30 15:57:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:57:02,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:57:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:57:02,757 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:57:02,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 15:57:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:57:02,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 15:57:02,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:57:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:57:03,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:57:03,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:57:03,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 15:57:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:57:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250259156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:57:03,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:57:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 30 [2023-08-30 15:57:03,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437948089] [2023-08-30 15:57:03,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:57:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 15:57:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:57:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 15:57:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-08-30 15:57:06,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 369 [2023-08-30 15:57:06,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 370 transitions, 6036 flow. Second operand has 32 states, 32 states have (on average 130.53125) internal successors, (4177), 32 states have internal predecessors, (4177), 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) [2023-08-30 15:57:06,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:57:06,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 369 [2023-08-30 15:57:06,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:57:12,675 INFO L130 PetriNetUnfolder]: 13288/25053 cut-off events. [2023-08-30 15:57:12,676 INFO L131 PetriNetUnfolder]: For 381967/381967 co-relation queries the response was YES. [2023-08-30 15:57:12,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159144 conditions, 25053 events. 13288/25053 cut-off events. For 381967/381967 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 222059 event pairs, 2461 based on Foata normal form. 1392/25253 useless extension candidates. Maximal degree in co-relation 159076. Up to 7298 conditions per place. [2023-08-30 15:57:13,050 INFO L137 encePairwiseOnDemand]: 355/369 looper letters, 324 selfloop transitions, 179 changer transitions 92/595 dead transitions. [2023-08-30 15:57:13,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 595 transitions, 9623 flow [2023-08-30 15:57:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 15:57:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 15:57:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4475 transitions. [2023-08-30 15:57:13,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674960992034163 [2023-08-30 15:57:13,054 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4475 transitions. [2023-08-30 15:57:13,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4475 transitions. [2023-08-30 15:57:13,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:57:13,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4475 transitions. [2023-08-30 15:57:13,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 135.6060606060606) internal successors, (4475), 33 states have internal predecessors, (4475), 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) [2023-08-30 15:57:13,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 369.0) internal successors, (12546), 34 states have internal predecessors, (12546), 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) [2023-08-30 15:57:13,068 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 369.0) internal successors, (12546), 34 states have internal predecessors, (12546), 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) [2023-08-30 15:57:13,068 INFO L175 Difference]: Start difference. First operand has 207 places, 370 transitions, 6036 flow. Second operand 33 states and 4475 transitions. [2023-08-30 15:57:13,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 595 transitions, 9623 flow [2023-08-30 15:57:15,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 595 transitions, 9341 flow, removed 133 selfloop flow, removed 11 redundant places. [2023-08-30 15:57:15,207 INFO L231 Difference]: Finished difference. Result has 232 places, 354 transitions, 6092 flow [2023-08-30 15:57:15,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=4905, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6092, PETRI_PLACES=232, PETRI_TRANSITIONS=354} [2023-08-30 15:57:15,208 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 196 predicate places. [2023-08-30 15:57:15,208 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 354 transitions, 6092 flow [2023-08-30 15:57:15,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 130.53125) internal successors, (4177), 32 states have internal predecessors, (4177), 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) [2023-08-30 15:57:15,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:57:15,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:57:15,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 15:57:15,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:57:15,413 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:57:15,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:57:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash -215319966, now seen corresponding path program 2 times [2023-08-30 15:57:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:57:15,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963943300] [2023-08-30 15:57:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:57:15,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:57:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:57:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:57:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:57:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963943300] [2023-08-30 15:57:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963943300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:57:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492127760] [2023-08-30 15:57:15,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:57:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:57:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:57:15,957 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:57:15,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 15:57:16,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:57:16,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:57:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:57:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:57:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:57:16,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:57:16,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:57:16,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 15:57:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:57:16,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492127760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:57:16,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:57:16,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 15:57:16,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602904742] [2023-08-30 15:57:16,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:57:16,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 15:57:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:57:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 15:57:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-08-30 15:57:17,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 369 [2023-08-30 15:57:17,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 354 transitions, 6092 flow. Second operand has 25 states, 25 states have (on average 139.84) internal successors, (3496), 25 states have internal predecessors, (3496), 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) [2023-08-30 15:57:17,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:57:17,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 369 [2023-08-30 15:57:17,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:57:23,058 INFO L130 PetriNetUnfolder]: 12335/23238 cut-off events. [2023-08-30 15:57:23,058 INFO L131 PetriNetUnfolder]: For 369089/369089 co-relation queries the response was YES. [2023-08-30 15:57:23,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156072 conditions, 23238 events. 12335/23238 cut-off events. For 369089/369089 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 202846 event pairs, 3495 based on Foata normal form. 98/22654 useless extension candidates. Maximal degree in co-relation 155999. Up to 18822 conditions per place. [2023-08-30 15:57:23,265 INFO L137 encePairwiseOnDemand]: 360/369 looper letters, 300 selfloop transitions, 131 changer transitions 60/491 dead transitions. [2023-08-30 15:57:23,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 491 transitions, 8417 flow [2023-08-30 15:57:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:57:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:57:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3190 transitions. [2023-08-30 15:57:23,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2023-08-30 15:57:23,268 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3190 transitions. [2023-08-30 15:57:23,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3190 transitions. [2023-08-30 15:57:23,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:57:23,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3190 transitions. [2023-08-30 15:57:23,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 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) [2023-08-30 15:57:23,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 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) [2023-08-30 15:57:23,276 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 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) [2023-08-30 15:57:23,276 INFO L175 Difference]: Start difference. First operand has 232 places, 354 transitions, 6092 flow. Second operand 22 states and 3190 transitions. [2023-08-30 15:57:23,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 491 transitions, 8417 flow [2023-08-30 15:57:25,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 491 transitions, 7813 flow, removed 141 selfloop flow, removed 15 redundant places. [2023-08-30 15:57:25,521 INFO L231 Difference]: Finished difference. Result has 241 places, 349 transitions, 5996 flow [2023-08-30 15:57:25,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5676, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5996, PETRI_PLACES=241, PETRI_TRANSITIONS=349} [2023-08-30 15:57:25,521 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 205 predicate places. [2023-08-30 15:57:25,522 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 349 transitions, 5996 flow [2023-08-30 15:57:25,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 139.84) internal successors, (3496), 25 states have internal predecessors, (3496), 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) [2023-08-30 15:57:25,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:57:25,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:57:25,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 15:57:25,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:57:25,723 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:57:25,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:57:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash -209409819, now seen corresponding path program 2 times [2023-08-30 15:57:25,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:57:25,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115239161] [2023-08-30 15:57:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:57:25,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:57:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:57:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:57:26,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:57:26,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115239161] [2023-08-30 15:57:26,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115239161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:57:26,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030240275] [2023-08-30 15:57:26,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:57:26,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:57:26,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:57:26,722 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:57:26,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 15:57:26,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:57:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:57:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 15:57:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:57:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:57:26,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:57:26,879 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 15:57:26,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 15:57:26,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 15:57:27,030 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 15:57:27,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 15:57:27,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:57:27,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:57:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:57:27,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:57:27,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:57:27,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:57:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:57:27,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:57:30,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:57:30,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-08-30 15:57:30,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:57:30,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 343 [2023-08-30 15:57:30,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 75 [2023-08-30 15:57:30,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 138 [2023-08-30 15:57:30,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2023-08-30 15:57:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:57:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030240275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:57:30,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:57:30,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 34 [2023-08-30 15:57:30,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582226465] [2023-08-30 15:57:30,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:57:30,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:57:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:57:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:57:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1131, Unknown=5, NotChecked=0, Total=1260 [2023-08-30 15:57:31,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 369 [2023-08-30 15:57:31,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 349 transitions, 5996 flow. Second operand has 36 states, 36 states have (on average 96.41666666666667) internal successors, (3471), 36 states have internal predecessors, (3471), 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) [2023-08-30 15:57:31,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:57:31,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 369 [2023-08-30 15:57:31,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:57:41,220 INFO L130 PetriNetUnfolder]: 14626/27408 cut-off events. [2023-08-30 15:57:41,221 INFO L131 PetriNetUnfolder]: For 433795/433795 co-relation queries the response was YES. [2023-08-30 15:57:41,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182073 conditions, 27408 events. 14626/27408 cut-off events. For 433795/433795 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 243425 event pairs, 2079 based on Foata normal form. 462/27048 useless extension candidates. Maximal degree in co-relation 181999. Up to 14228 conditions per place. [2023-08-30 15:57:41,450 INFO L137 encePairwiseOnDemand]: 355/369 looper letters, 299 selfloop transitions, 286 changer transitions 127/712 dead transitions. [2023-08-30 15:57:41,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 712 transitions, 11974 flow [2023-08-30 15:57:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 15:57:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 15:57:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 5010 transitions. [2023-08-30 15:57:41,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27154471544715447 [2023-08-30 15:57:41,456 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 5010 transitions. [2023-08-30 15:57:41,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 5010 transitions. [2023-08-30 15:57:41,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:57:41,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 5010 transitions. [2023-08-30 15:57:41,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 100.2) internal successors, (5010), 50 states have internal predecessors, (5010), 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) [2023-08-30 15:57:41,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 369.0) internal successors, (18819), 51 states have internal predecessors, (18819), 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) [2023-08-30 15:57:41,473 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 369.0) internal successors, (18819), 51 states have internal predecessors, (18819), 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) [2023-08-30 15:57:41,473 INFO L175 Difference]: Start difference. First operand has 241 places, 349 transitions, 5996 flow. Second operand 50 states and 5010 transitions. [2023-08-30 15:57:41,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 712 transitions, 11974 flow [2023-08-30 15:57:43,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 712 transitions, 11197 flow, removed 195 selfloop flow, removed 17 redundant places. [2023-08-30 15:57:43,736 INFO L231 Difference]: Finished difference. Result has 278 places, 465 transitions, 8470 flow [2023-08-30 15:57:43,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=8470, PETRI_PLACES=278, PETRI_TRANSITIONS=465} [2023-08-30 15:57:43,737 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 242 predicate places. [2023-08-30 15:57:43,737 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 465 transitions, 8470 flow [2023-08-30 15:57:43,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 96.41666666666667) internal successors, (3471), 36 states have internal predecessors, (3471), 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) [2023-08-30 15:57:43,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:57:43,738 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:57:43,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 15:57:43,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 15:57:43,943 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:57:43,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:57:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1318944897, now seen corresponding path program 2 times [2023-08-30 15:57:43,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:57:43,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810555035] [2023-08-30 15:57:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:57:43,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:57:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:57:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:57:45,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:57:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810555035] [2023-08-30 15:57:45,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810555035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:57:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547401320] [2023-08-30 15:57:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:57:45,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:57:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:57:45,042 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:57:45,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 15:57:45,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:57:45,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:57:45,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:57:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:57:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 15:57:45,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:57:45,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:57:45,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-30 15:57:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 15:57:45,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547401320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:57:45,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:57:45,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 3, 3] total 17 [2023-08-30 15:57:45,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236057522] [2023-08-30 15:57:45,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:57:45,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:57:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:57:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:57:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:57:46,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 369 [2023-08-30 15:57:46,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 465 transitions, 8470 flow. Second operand has 19 states, 19 states have (on average 134.68421052631578) internal successors, (2559), 19 states have internal predecessors, (2559), 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) [2023-08-30 15:57:46,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:57:46,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 369 [2023-08-30 15:57:46,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:57:54,450 INFO L130 PetriNetUnfolder]: 17879/33359 cut-off events. [2023-08-30 15:57:54,450 INFO L131 PetriNetUnfolder]: For 592597/592597 co-relation queries the response was YES. [2023-08-30 15:57:54,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237078 conditions, 33359 events. 17879/33359 cut-off events. For 592597/592597 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 303365 event pairs, 4580 based on Foata normal form. 618/33559 useless extension candidates. Maximal degree in co-relation 236996. Up to 11666 conditions per place. [2023-08-30 15:57:54,806 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 452 selfloop transitions, 152 changer transitions 45/649 dead transitions. [2023-08-30 15:57:54,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 649 transitions, 12571 flow [2023-08-30 15:57:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 15:57:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 15:57:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2660 transitions. [2023-08-30 15:57:54,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2023-08-30 15:57:54,809 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2660 transitions. [2023-08-30 15:57:54,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2660 transitions. [2023-08-30 15:57:54,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:57:54,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2660 transitions. [2023-08-30 15:57:54,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 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) [2023-08-30 15:57:54,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 369.0) internal successors, (7380), 20 states have internal predecessors, (7380), 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) [2023-08-30 15:57:54,816 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 369.0) internal successors, (7380), 20 states have internal predecessors, (7380), 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) [2023-08-30 15:57:54,816 INFO L175 Difference]: Start difference. First operand has 278 places, 465 transitions, 8470 flow. Second operand 19 states and 2660 transitions. [2023-08-30 15:57:54,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 649 transitions, 12571 flow [2023-08-30 15:58:02,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 649 transitions, 12048 flow, removed 220 selfloop flow, removed 21 redundant places. [2023-08-30 15:58:02,248 INFO L231 Difference]: Finished difference. Result has 255 places, 438 transitions, 7908 flow [2023-08-30 15:58:02,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=7349, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7908, PETRI_PLACES=255, PETRI_TRANSITIONS=438} [2023-08-30 15:58:02,248 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 219 predicate places. [2023-08-30 15:58:02,249 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 438 transitions, 7908 flow [2023-08-30 15:58:02,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 134.68421052631578) internal successors, (2559), 19 states have internal predecessors, (2559), 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) [2023-08-30 15:58:02,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:58:02,249 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:58:02,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 15:58:02,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 15:58:02,460 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:58:02,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:58:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1315433216, now seen corresponding path program 3 times [2023-08-30 15:58:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:58:02,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874925004] [2023-08-30 15:58:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:58:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:58:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:58:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:58:04,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:58:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874925004] [2023-08-30 15:58:04,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874925004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:58:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180497181] [2023-08-30 15:58:04,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:58:04,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:58:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:58:04,729 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:58:04,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 15:58:04,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:58:04,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:58:04,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 15:58:04,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:58:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:58:05,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:58:05,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:58:05,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 15:58:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 15:58:05,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180497181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:58:05,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:58:05,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 5] total 24 [2023-08-30 15:58:05,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846834150] [2023-08-30 15:58:05,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:58:05,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:58:05,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:58:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:58:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2023-08-30 15:58:08,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 369 [2023-08-30 15:58:08,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 438 transitions, 7908 flow. Second operand has 26 states, 26 states have (on average 131.53846153846155) internal successors, (3420), 26 states have internal predecessors, (3420), 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) [2023-08-30 15:58:08,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:58:08,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 369 [2023-08-30 15:58:08,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:58:17,480 INFO L130 PetriNetUnfolder]: 18538/34288 cut-off events. [2023-08-30 15:58:17,480 INFO L131 PetriNetUnfolder]: For 591937/591937 co-relation queries the response was YES. [2023-08-30 15:58:17,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244784 conditions, 34288 events. 18538/34288 cut-off events. For 591937/591937 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 310793 event pairs, 4121 based on Foata normal form. 326/34116 useless extension candidates. Maximal degree in co-relation 244702. Up to 10311 conditions per place. [2023-08-30 15:58:17,930 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 309 selfloop transitions, 213 changer transitions 24/546 dead transitions. [2023-08-30 15:58:17,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 546 transitions, 10448 flow [2023-08-30 15:58:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 15:58:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 15:58:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2849 transitions. [2023-08-30 15:58:17,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3676603432700994 [2023-08-30 15:58:17,933 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2849 transitions. [2023-08-30 15:58:17,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2849 transitions. [2023-08-30 15:58:17,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:58:17,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2849 transitions. [2023-08-30 15:58:17,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 135.66666666666666) internal successors, (2849), 21 states have internal predecessors, (2849), 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) [2023-08-30 15:58:17,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 369.0) internal successors, (8118), 22 states have internal predecessors, (8118), 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) [2023-08-30 15:58:17,941 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 369.0) internal successors, (8118), 22 states have internal predecessors, (8118), 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) [2023-08-30 15:58:17,942 INFO L175 Difference]: Start difference. First operand has 255 places, 438 transitions, 7908 flow. Second operand 21 states and 2849 transitions. [2023-08-30 15:58:17,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 546 transitions, 10448 flow [2023-08-30 15:58:21,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 546 transitions, 10200 flow, removed 104 selfloop flow, removed 9 redundant places. [2023-08-30 15:58:21,978 INFO L231 Difference]: Finished difference. Result has 262 places, 443 transitions, 8499 flow [2023-08-30 15:58:21,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=7420, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8499, PETRI_PLACES=262, PETRI_TRANSITIONS=443} [2023-08-30 15:58:21,979 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 226 predicate places. [2023-08-30 15:58:21,979 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 443 transitions, 8499 flow [2023-08-30 15:58:21,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 131.53846153846155) internal successors, (3420), 26 states have internal predecessors, (3420), 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) [2023-08-30 15:58:21,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:58:21,979 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:58:21,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 15:58:22,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:58:22,180 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:58:22,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:58:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1271212665, now seen corresponding path program 4 times [2023-08-30 15:58:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:58:22,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155174626] [2023-08-30 15:58:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:58:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:58:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:58:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:58:23,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:58:23,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155174626] [2023-08-30 15:58:23,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155174626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:58:23,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949278661] [2023-08-30 15:58:23,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:58:23,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:58:23,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:58:23,729 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:58:23,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 15:58:23,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:58:23,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:58:23,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:58:23,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:58:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:58:24,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:58:24,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:58:24,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 15:58:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 15:58:24,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949278661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:58:24,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:58:24,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 5] total 25 [2023-08-30 15:58:24,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008428846] [2023-08-30 15:58:24,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:58:24,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:58:24,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:58:24,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:58:24,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2023-08-30 15:58:26,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 369 [2023-08-30 15:58:26,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 443 transitions, 8499 flow. Second operand has 27 states, 27 states have (on average 133.59259259259258) internal successors, (3607), 27 states have internal predecessors, (3607), 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) [2023-08-30 15:58:26,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:58:26,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 369 [2023-08-30 15:58:26,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:58:35,634 INFO L130 PetriNetUnfolder]: 21757/39733 cut-off events. [2023-08-30 15:58:35,634 INFO L131 PetriNetUnfolder]: For 702317/702317 co-relation queries the response was YES. [2023-08-30 15:58:36,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286974 conditions, 39733 events. 21757/39733 cut-off events. For 702317/702317 co-relation queries the response was YES. Maximal size of possible extension queue 1629. Compared 362773 event pairs, 5088 based on Foata normal form. 852/39993 useless extension candidates. Maximal degree in co-relation 286893. Up to 12893 conditions per place. [2023-08-30 15:58:36,227 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 449 selfloop transitions, 201 changer transitions 37/687 dead transitions. [2023-08-30 15:58:36,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 687 transitions, 13431 flow [2023-08-30 15:58:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:58:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:58:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3598 transitions. [2023-08-30 15:58:36,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37502605795288724 [2023-08-30 15:58:36,230 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3598 transitions. [2023-08-30 15:58:36,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3598 transitions. [2023-08-30 15:58:36,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:58:36,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3598 transitions. [2023-08-30 15:58:36,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 138.3846153846154) internal successors, (3598), 26 states have internal predecessors, (3598), 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) [2023-08-30 15:58:36,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 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) [2023-08-30 15:58:36,239 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 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) [2023-08-30 15:58:36,239 INFO L175 Difference]: Start difference. First operand has 262 places, 443 transitions, 8499 flow. Second operand 26 states and 3598 transitions. [2023-08-30 15:58:36,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 687 transitions, 13431 flow [2023-08-30 15:58:40,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 687 transitions, 13129 flow, removed 76 selfloop flow, removed 14 redundant places. [2023-08-30 15:58:40,627 INFO L231 Difference]: Finished difference. Result has 272 places, 465 transitions, 9198 flow [2023-08-30 15:58:40,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=7598, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9198, PETRI_PLACES=272, PETRI_TRANSITIONS=465} [2023-08-30 15:58:40,628 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 236 predicate places. [2023-08-30 15:58:40,628 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 465 transitions, 9198 flow [2023-08-30 15:58:40,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 133.59259259259258) internal successors, (3607), 27 states have internal predecessors, (3607), 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) [2023-08-30 15:58:40,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:58:40,629 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:58:40,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 15:58:40,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:58:40,834 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:58:40,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:58:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash -778404061, now seen corresponding path program 4 times [2023-08-30 15:58:40,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:58:40,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548409597] [2023-08-30 15:58:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:58:40,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:58:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:58:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:58:42,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:58:42,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548409597] [2023-08-30 15:58:42,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548409597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:58:42,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856141949] [2023-08-30 15:58:42,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:58:42,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:58:42,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:58:42,233 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:58:42,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 15:58:42,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:58:42,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:58:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 15:58:42,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:58:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:58:42,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:58:42,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:58:42,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 15:58:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 15:58:42,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856141949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:58:42,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:58:42,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 5] total 23 [2023-08-30 15:58:42,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326320196] [2023-08-30 15:58:42,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:58:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 15:58:42,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:58:42,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 15:58:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-08-30 15:58:45,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 369 [2023-08-30 15:58:45,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 465 transitions, 9198 flow. Second operand has 25 states, 25 states have (on average 136.68) internal successors, (3417), 25 states have internal predecessors, (3417), 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) [2023-08-30 15:58:45,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:58:45,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 369 [2023-08-30 15:58:45,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:58:55,042 INFO L130 PetriNetUnfolder]: 22721/41157 cut-off events. [2023-08-30 15:58:55,043 INFO L131 PetriNetUnfolder]: For 791991/791991 co-relation queries the response was YES. [2023-08-30 15:58:55,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307967 conditions, 41157 events. 22721/41157 cut-off events. For 791991/791991 co-relation queries the response was YES. Maximal size of possible extension queue 1677. Compared 374187 event pairs, 5317 based on Foata normal form. 738/41159 useless extension candidates. Maximal degree in co-relation 307885. Up to 18937 conditions per place. [2023-08-30 15:58:55,688 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 326 selfloop transitions, 251 changer transitions 44/621 dead transitions. [2023-08-30 15:58:55,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 621 transitions, 12883 flow [2023-08-30 15:58:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:58:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:58:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3233 transitions. [2023-08-30 15:58:55,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38093554848591965 [2023-08-30 15:58:55,691 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3233 transitions. [2023-08-30 15:58:55,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3233 transitions. [2023-08-30 15:58:55,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:58:55,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3233 transitions. [2023-08-30 15:58:55,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 140.56521739130434) internal successors, (3233), 23 states have internal predecessors, (3233), 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) [2023-08-30 15:58:55,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 369.0) internal successors, (8856), 24 states have internal predecessors, (8856), 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) [2023-08-30 15:58:55,699 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 369.0) internal successors, (8856), 24 states have internal predecessors, (8856), 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) [2023-08-30 15:58:55,699 INFO L175 Difference]: Start difference. First operand has 272 places, 465 transitions, 9198 flow. Second operand 23 states and 3233 transitions. [2023-08-30 15:58:55,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 621 transitions, 12883 flow [2023-08-30 15:59:01,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 621 transitions, 12747 flow, removed 44 selfloop flow, removed 11 redundant places. [2023-08-30 15:59:01,546 INFO L231 Difference]: Finished difference. Result has 286 places, 493 transitions, 10633 flow [2023-08-30 15:59:01,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=8892, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10633, PETRI_PLACES=286, PETRI_TRANSITIONS=493} [2023-08-30 15:59:01,547 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 250 predicate places. [2023-08-30 15:59:01,547 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 493 transitions, 10633 flow [2023-08-30 15:59:01,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 136.68) internal successors, (3417), 25 states have internal predecessors, (3417), 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) [2023-08-30 15:59:01,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:59:01,547 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:59:01,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 15:59:01,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:59:01,748 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:59:01,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:59:01,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1548713199, now seen corresponding path program 3 times [2023-08-30 15:59:01,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:59:01,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061788666] [2023-08-30 15:59:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:59:01,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:59:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:59:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 15:59:01,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:59:01,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061788666] [2023-08-30 15:59:01,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061788666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:59:01,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031957038] [2023-08-30 15:59:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:59:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:59:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:59:01,861 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:59:01,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 15:59:02,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:59:02,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:59:02,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 15:59:02,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:59:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 15:59:02,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:59:02,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:59:02,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-30 15:59:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 15:59:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031957038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:59:02,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:59:02,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2023-08-30 15:59:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756220950] [2023-08-30 15:59:02,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:59:02,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 15:59:02,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:59:02,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 15:59:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-30 15:59:03,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 369 [2023-08-30 15:59:03,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 493 transitions, 10633 flow. Second operand has 18 states, 18 states have (on average 140.94444444444446) internal successors, (2537), 18 states have internal predecessors, (2537), 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) [2023-08-30 15:59:03,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:59:03,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 369 [2023-08-30 15:59:03,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:59:15,099 INFO L130 PetriNetUnfolder]: 26275/46559 cut-off events. [2023-08-30 15:59:15,099 INFO L131 PetriNetUnfolder]: For 1085136/1085136 co-relation queries the response was YES. [2023-08-30 15:59:15,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376810 conditions, 46559 events. 26275/46559 cut-off events. For 1085136/1085136 co-relation queries the response was YES. Maximal size of possible extension queue 1675. Compared 413611 event pairs, 4960 based on Foata normal form. 900/46419 useless extension candidates. Maximal degree in co-relation 376726. Up to 16205 conditions per place. [2023-08-30 15:59:15,877 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 326 selfloop transitions, 204 changer transitions 78/608 dead transitions. [2023-08-30 15:59:15,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 608 transitions, 13561 flow [2023-08-30 15:59:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 15:59:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 15:59:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1897 transitions. [2023-08-30 15:59:15,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545549301646865 [2023-08-30 15:59:15,882 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1897 transitions. [2023-08-30 15:59:15,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1897 transitions. [2023-08-30 15:59:15,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:59:15,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1897 transitions. [2023-08-30 15:59:15,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 145.92307692307693) internal successors, (1897), 13 states have internal predecessors, (1897), 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) [2023-08-30 15:59:15,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 369.0) internal successors, (5166), 14 states have internal predecessors, (5166), 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) [2023-08-30 15:59:15,888 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 369.0) internal successors, (5166), 14 states have internal predecessors, (5166), 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) [2023-08-30 15:59:15,888 INFO L175 Difference]: Start difference. First operand has 286 places, 493 transitions, 10633 flow. Second operand 13 states and 1897 transitions. [2023-08-30 15:59:15,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 608 transitions, 13561 flow [2023-08-30 15:59:24,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 608 transitions, 13073 flow, removed 191 selfloop flow, removed 14 redundant places. [2023-08-30 15:59:24,123 INFO L231 Difference]: Finished difference. Result has 277 places, 481 transitions, 10607 flow [2023-08-30 15:59:24,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=9916, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10607, PETRI_PLACES=277, PETRI_TRANSITIONS=481} [2023-08-30 15:59:24,123 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 241 predicate places. [2023-08-30 15:59:24,124 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 481 transitions, 10607 flow [2023-08-30 15:59:24,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 140.94444444444446) internal successors, (2537), 18 states have internal predecessors, (2537), 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) [2023-08-30 15:59:24,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:59:24,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:59:24,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 15:59:24,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 15:59:24,325 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:59:24,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:59:24,326 INFO L85 PathProgramCache]: Analyzing trace with hash 631486466, now seen corresponding path program 3 times [2023-08-30 15:59:24,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:59:24,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348255113] [2023-08-30 15:59:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:59:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:59:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:59:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:59:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:59:24,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348255113] [2023-08-30 15:59:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348255113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:59:24,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119555668] [2023-08-30 15:59:24,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:59:24,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:59:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:59:24,449 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:59:24,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 15:59:24,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:59:24,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:59:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 15:59:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:59:24,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:59:24,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 15:59:24,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 15:59:24,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 15:59:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 15:59:25,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:59:25,681 INFO L321 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-30 15:59:25,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 82 [2023-08-30 15:59:25,732 INFO L321 Elim1Store]: treesize reduction 5, result has 90.9 percent of original size [2023-08-30 15:59:25,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 461 treesize of output 452 [2023-08-30 15:59:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:59:25,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:59:25,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 84 [2023-08-30 15:59:25,796 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 15:59:25,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 81 [2023-08-30 15:59:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 15:59:26,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119555668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:59:26,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:59:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 22 [2023-08-30 15:59:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953099017] [2023-08-30 15:59:26,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:59:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:59:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:59:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:59:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=432, Unknown=3, NotChecked=0, Total=552 [2023-08-30 15:59:27,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 369 [2023-08-30 15:59:27,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 481 transitions, 10607 flow. Second operand has 24 states, 24 states have (on average 113.08333333333333) internal successors, (2714), 24 states have internal predecessors, (2714), 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) [2023-08-30 15:59:27,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:59:27,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 369 [2023-08-30 15:59:27,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:59:33,576 INFO L130 PetriNetUnfolder]: 12698/24055 cut-off events. [2023-08-30 15:59:33,576 INFO L131 PetriNetUnfolder]: For 576436/576436 co-relation queries the response was YES. [2023-08-30 15:59:33,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187268 conditions, 24055 events. 12698/24055 cut-off events. For 576436/576436 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 212700 event pairs, 1436 based on Foata normal form. 1888/25463 useless extension candidates. Maximal degree in co-relation 187184. Up to 13504 conditions per place. [2023-08-30 15:59:33,982 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 230 selfloop transitions, 181 changer transitions 103/514 dead transitions. [2023-08-30 15:59:33,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 514 transitions, 11326 flow [2023-08-30 15:59:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 15:59:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 15:59:33,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2001 transitions. [2023-08-30 15:59:33,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31898613103778095 [2023-08-30 15:59:33,984 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2001 transitions. [2023-08-30 15:59:33,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2001 transitions. [2023-08-30 15:59:33,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:59:33,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2001 transitions. [2023-08-30 15:59:33,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 117.70588235294117) internal successors, (2001), 17 states have internal predecessors, (2001), 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) [2023-08-30 15:59:33,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 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) [2023-08-30 15:59:33,988 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 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) [2023-08-30 15:59:33,989 INFO L175 Difference]: Start difference. First operand has 277 places, 481 transitions, 10607 flow. Second operand 17 states and 2001 transitions. [2023-08-30 15:59:33,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 514 transitions, 11326 flow [2023-08-30 15:59:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 514 transitions, 10758 flow, removed 164 selfloop flow, removed 17 redundant places. [2023-08-30 15:59:36,763 INFO L231 Difference]: Finished difference. Result has 248 places, 374 transitions, 8034 flow [2023-08-30 15:59:36,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=8660, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8034, PETRI_PLACES=248, PETRI_TRANSITIONS=374} [2023-08-30 15:59:36,764 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 212 predicate places. [2023-08-30 15:59:36,764 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 374 transitions, 8034 flow [2023-08-30 15:59:36,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 113.08333333333333) internal successors, (2714), 24 states have internal predecessors, (2714), 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) [2023-08-30 15:59:36,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:59:36,765 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:59:36,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 15:59:36,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 15:59:36,969 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:59:36,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:59:36,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1010249698, now seen corresponding path program 4 times [2023-08-30 15:59:36,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:59:36,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075607506] [2023-08-30 15:59:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:59:36,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:59:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:59:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:59:38,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:59:38,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075607506] [2023-08-30 15:59:38,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075607506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:59:38,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586119670] [2023-08-30 15:59:38,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:59:38,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:59:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:59:38,938 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:59:38,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 15:59:39,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:59:39,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:59:39,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:59:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:59:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 15:59:39,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:59:39,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:59:39,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 15:59:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 15:59:39,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586119670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:59:39,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:59:39,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 4] total 22 [2023-08-30 15:59:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31564718] [2023-08-30 15:59:39,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:59:39,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:59:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:59:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:59:39,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-08-30 15:59:41,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 369 [2023-08-30 15:59:41,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 374 transitions, 8034 flow. Second operand has 24 states, 24 states have (on average 131.5) internal successors, (3156), 24 states have internal predecessors, (3156), 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) [2023-08-30 15:59:41,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:59:41,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 369 [2023-08-30 15:59:41,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:59:47,115 INFO L130 PetriNetUnfolder]: 12275/23254 cut-off events. [2023-08-30 15:59:47,115 INFO L131 PetriNetUnfolder]: For 482973/482973 co-relation queries the response was YES. [2023-08-30 15:59:47,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181615 conditions, 23254 events. 12275/23254 cut-off events. For 482973/482973 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 206261 event pairs, 3473 based on Foata normal form. 184/22958 useless extension candidates. Maximal degree in co-relation 181549. Up to 12008 conditions per place. [2023-08-30 15:59:47,322 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 235 selfloop transitions, 144 changer transitions 54/433 dead transitions. [2023-08-30 15:59:47,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 433 transitions, 9448 flow [2023-08-30 15:59:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:59:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:59:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2960 transitions. [2023-08-30 15:59:47,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3646218280364622 [2023-08-30 15:59:47,325 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2960 transitions. [2023-08-30 15:59:47,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2960 transitions. [2023-08-30 15:59:47,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:59:47,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2960 transitions. [2023-08-30 15:59:47,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 134.54545454545453) internal successors, (2960), 22 states have internal predecessors, (2960), 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) [2023-08-30 15:59:47,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 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) [2023-08-30 15:59:47,333 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 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) [2023-08-30 15:59:47,333 INFO L175 Difference]: Start difference. First operand has 248 places, 374 transitions, 8034 flow. Second operand 22 states and 2960 transitions. [2023-08-30 15:59:47,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 433 transitions, 9448 flow [2023-08-30 15:59:49,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 433 transitions, 8718 flow, removed 212 selfloop flow, removed 20 redundant places. [2023-08-30 15:59:49,921 INFO L231 Difference]: Finished difference. Result has 227 places, 353 transitions, 7237 flow [2023-08-30 15:59:49,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=7274, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7237, PETRI_PLACES=227, PETRI_TRANSITIONS=353} [2023-08-30 15:59:49,922 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 191 predicate places. [2023-08-30 15:59:49,922 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 353 transitions, 7237 flow [2023-08-30 15:59:49,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 131.5) internal successors, (3156), 24 states have internal predecessors, (3156), 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) [2023-08-30 15:59:49,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:59:49,922 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:59:49,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 15:59:50,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 15:59:50,123 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 15:59:50,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:59:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1713700757, now seen corresponding path program 4 times [2023-08-30 15:59:50,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:59:50,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419896152] [2023-08-30 15:59:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:59:50,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:59:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:59:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:59:50,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:59:50,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419896152] [2023-08-30 15:59:50,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419896152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:59:50,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768155954] [2023-08-30 15:59:50,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:59:50,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:59:50,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:59:50,801 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:59:50,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 15:59:50,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:59:50,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:59:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:59:50,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:59:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 15:59:51,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:59:51,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:59:51,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-30 15:59:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-30 15:59:51,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768155954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:59:51,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:59:51,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 4] total 20 [2023-08-30 15:59:51,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903989884] [2023-08-30 15:59:51,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:59:51,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:59:51,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:59:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:59:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2023-08-30 15:59:52,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 369 [2023-08-30 15:59:52,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 353 transitions, 7237 flow. Second operand has 22 states, 22 states have (on average 144.0) internal successors, (3168), 22 states have internal predecessors, (3168), 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) [2023-08-30 15:59:52,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:59:52,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 369 [2023-08-30 15:59:52,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:59:58,924 INFO L130 PetriNetUnfolder]: 17337/32874 cut-off events. [2023-08-30 15:59:58,924 INFO L131 PetriNetUnfolder]: For 596567/596567 co-relation queries the response was YES. [2023-08-30 15:59:59,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240903 conditions, 32874 events. 17337/32874 cut-off events. For 596567/596567 co-relation queries the response was YES. Maximal size of possible extension queue 1482. Compared 306827 event pairs, 1728 based on Foata normal form. 672/33418 useless extension candidates. Maximal degree in co-relation 240846. Up to 13420 conditions per place. [2023-08-30 15:59:59,186 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 347 selfloop transitions, 248 changer transitions 20/615 dead transitions. [2023-08-30 15:59:59,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 615 transitions, 13137 flow [2023-08-30 15:59:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:59:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:59:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3553 transitions. [2023-08-30 15:59:59,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401196928635953 [2023-08-30 15:59:59,189 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3553 transitions. [2023-08-30 15:59:59,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3553 transitions. [2023-08-30 15:59:59,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:59:59,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3553 transitions. [2023-08-30 15:59:59,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 148.04166666666666) internal successors, (3553), 24 states have internal predecessors, (3553), 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) [2023-08-30 15:59:59,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 369.0) internal successors, (9225), 25 states have internal predecessors, (9225), 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) [2023-08-30 15:59:59,195 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 369.0) internal successors, (9225), 25 states have internal predecessors, (9225), 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) [2023-08-30 15:59:59,195 INFO L175 Difference]: Start difference. First operand has 227 places, 353 transitions, 7237 flow. Second operand 24 states and 3553 transitions. [2023-08-30 15:59:59,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 615 transitions, 13137 flow [2023-08-30 16:00:01,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 615 transitions, 12565 flow, removed 29 selfloop flow, removed 21 redundant places. [2023-08-30 16:00:01,247 INFO L231 Difference]: Finished difference. Result has 208 places, 419 transitions, 8701 flow [2023-08-30 16:00:01,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=6768, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8701, PETRI_PLACES=208, PETRI_TRANSITIONS=419} [2023-08-30 16:00:01,248 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 172 predicate places. [2023-08-30 16:00:01,248 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 419 transitions, 8701 flow [2023-08-30 16:00:01,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 144.0) internal successors, (3168), 22 states have internal predecessors, (3168), 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) [2023-08-30 16:00:01,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:00:01,248 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:00:01,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 16:00:01,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 16:00:01,449 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:00:01,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:00:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash 262834408, now seen corresponding path program 5 times [2023-08-30 16:00:01,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:00:01,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623409381] [2023-08-30 16:00:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:00:01,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:00:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:00:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:00:03,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:00:03,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623409381] [2023-08-30 16:00:03,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623409381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:00:03,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227957543] [2023-08-30 16:00:03,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:00:03,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:00:03,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:00:03,533 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:00:03,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 16:00:03,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 16:00:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:00:03,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 16:00:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:00:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 16:00:03,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:00:03,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:03,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 16:00:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-30 16:00:03,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227957543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:00:03,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:00:03,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 5] total 27 [2023-08-30 16:00:03,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454288410] [2023-08-30 16:00:03,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:00:03,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 16:00:03,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:00:03,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 16:00:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2023-08-30 16:00:08,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 369 [2023-08-30 16:00:08,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 419 transitions, 8701 flow. Second operand has 29 states, 29 states have (on average 132.6551724137931) internal successors, (3847), 29 states have internal predecessors, (3847), 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) [2023-08-30 16:00:08,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:00:08,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 369 [2023-08-30 16:00:08,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:00:18,700 INFO L130 PetriNetUnfolder]: 19122/36903 cut-off events. [2023-08-30 16:00:18,701 INFO L131 PetriNetUnfolder]: For 755675/755675 co-relation queries the response was YES. [2023-08-30 16:00:18,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269673 conditions, 36903 events. 19122/36903 cut-off events. For 755675/755675 co-relation queries the response was YES. Maximal size of possible extension queue 1668. Compared 356937 event pairs, 3486 based on Foata normal form. 1208/37983 useless extension candidates. Maximal degree in co-relation 269622. Up to 14504 conditions per place. [2023-08-30 16:00:19,029 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 215 selfloop transitions, 409 changer transitions 44/668 dead transitions. [2023-08-30 16:00:19,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 668 transitions, 13360 flow [2023-08-30 16:00:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 16:00:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 16:00:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5435 transitions. [2023-08-30 16:00:19,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682249322493225 [2023-08-30 16:00:19,033 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5435 transitions. [2023-08-30 16:00:19,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5435 transitions. [2023-08-30 16:00:19,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:00:19,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5435 transitions. [2023-08-30 16:00:19,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 135.875) internal successors, (5435), 40 states have internal predecessors, (5435), 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) [2023-08-30 16:00:19,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 369.0) internal successors, (15129), 41 states have internal predecessors, (15129), 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) [2023-08-30 16:00:19,044 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 369.0) internal successors, (15129), 41 states have internal predecessors, (15129), 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) [2023-08-30 16:00:19,044 INFO L175 Difference]: Start difference. First operand has 208 places, 419 transitions, 8701 flow. Second operand 40 states and 5435 transitions. [2023-08-30 16:00:19,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 668 transitions, 13360 flow [2023-08-30 16:00:21,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 668 transitions, 11851 flow, removed 405 selfloop flow, removed 14 redundant places. [2023-08-30 16:00:21,235 INFO L231 Difference]: Finished difference. Result has 243 places, 529 transitions, 10502 flow [2023-08-30 16:00:21,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=10502, PETRI_PLACES=243, PETRI_TRANSITIONS=529} [2023-08-30 16:00:21,236 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 207 predicate places. [2023-08-30 16:00:21,236 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 529 transitions, 10502 flow [2023-08-30 16:00:21,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 132.6551724137931) internal successors, (3847), 29 states have internal predecessors, (3847), 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) [2023-08-30 16:00:21,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:00:21,237 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:00:21,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 16:00:21,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 16:00:21,437 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:00:21,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:00:21,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1816564843, now seen corresponding path program 5 times [2023-08-30 16:00:21,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:00:21,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986232932] [2023-08-30 16:00:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:00:21,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:00:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:00:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:00:21,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:00:21,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986232932] [2023-08-30 16:00:21,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986232932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:00:21,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889177547] [2023-08-30 16:00:21,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:00:21,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:00:21,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:00:21,976 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:00:21,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 16:00:22,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 16:00:22,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:00:22,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 16:00:22,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:00:22,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 16:00:22,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:00:22,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:00:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:00:22,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:00:22,835 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_~q2_back~0_160 Int) (~q2_front~0 Int) (v_ArrVal_1717 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1717) c_~q2~0.base))) (or (< (select .cse0 (+ (* 4 ~q2_front~0) c_~q2~0.offset 8)) 2147483647) (< v_~q2_back~0_160 (+ 2 ~q2_front~0)) (< ~q2_front~0 0) (<= c_~N~0 (select .cse0 (+ (* 4 v_~q2_back~0_160) c_~q2~0.offset))) (<= c_~n2~0 v_~q2_back~0_160)))) is different from false [2023-08-30 16:00:22,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:22,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-08-30 16:00:22,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:22,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 132 [2023-08-30 16:00:22,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:22,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 106 [2023-08-30 16:00:23,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:23,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2023-08-30 16:00:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 16:00:23,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889177547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:00:23,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:00:23,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 36 [2023-08-30 16:00:23,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288870861] [2023-08-30 16:00:23,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:00:23,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 16:00:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:00:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 16:00:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1147, Unknown=1, NotChecked=70, Total=1406 [2023-08-30 16:00:23,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 369 [2023-08-30 16:00:23,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 529 transitions, 10502 flow. Second operand has 38 states, 38 states have (on average 112.71052631578948) internal successors, (4283), 38 states have internal predecessors, (4283), 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) [2023-08-30 16:00:23,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:00:23,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 369 [2023-08-30 16:00:23,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:00:33,444 INFO L130 PetriNetUnfolder]: 20935/40482 cut-off events. [2023-08-30 16:00:33,444 INFO L131 PetriNetUnfolder]: For 666472/666472 co-relation queries the response was YES. [2023-08-30 16:00:33,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279149 conditions, 40482 events. 20935/40482 cut-off events. For 666472/666472 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 390883 event pairs, 5382 based on Foata normal form. 172/40528 useless extension candidates. Maximal degree in co-relation 279088. Up to 29653 conditions per place. [2023-08-30 16:00:33,858 INFO L137 encePairwiseOnDemand]: 360/369 looper letters, 780 selfloop transitions, 343 changer transitions 43/1166 dead transitions. [2023-08-30 16:00:33,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 1166 transitions, 24464 flow [2023-08-30 16:00:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 16:00:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 16:00:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3059 transitions. [2023-08-30 16:00:33,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31884511152803835 [2023-08-30 16:00:33,860 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3059 transitions. [2023-08-30 16:00:33,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3059 transitions. [2023-08-30 16:00:33,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:00:33,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3059 transitions. [2023-08-30 16:00:33,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 117.65384615384616) internal successors, (3059), 26 states have internal predecessors, (3059), 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) [2023-08-30 16:00:33,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 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) [2023-08-30 16:00:33,866 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 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) [2023-08-30 16:00:33,866 INFO L175 Difference]: Start difference. First operand has 243 places, 529 transitions, 10502 flow. Second operand 26 states and 3059 transitions. [2023-08-30 16:00:33,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 1166 transitions, 24464 flow [2023-08-30 16:00:36,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1166 transitions, 23953 flow, removed 231 selfloop flow, removed 10 redundant places. [2023-08-30 16:00:36,843 INFO L231 Difference]: Finished difference. Result has 266 places, 761 transitions, 15668 flow [2023-08-30 16:00:36,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=10197, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15668, PETRI_PLACES=266, PETRI_TRANSITIONS=761} [2023-08-30 16:00:36,844 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 230 predicate places. [2023-08-30 16:00:36,844 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 761 transitions, 15668 flow [2023-08-30 16:00:36,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 112.71052631578948) internal successors, (4283), 38 states have internal predecessors, (4283), 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) [2023-08-30 16:00:36,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:00:36,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:00:36,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 16:00:37,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:00:37,054 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:00:37,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:00:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1622505985, now seen corresponding path program 5 times [2023-08-30 16:00:37,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:00:37,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533200318] [2023-08-30 16:00:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:00:37,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:00:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:00:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:00:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:00:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533200318] [2023-08-30 16:00:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533200318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:00:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253602702] [2023-08-30 16:00:37,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:00:37,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:00:37,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:00:37,544 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:00:37,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 16:00:37,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 16:00:37,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:00:37,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 16:00:37,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:00:37,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:00:37,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:00:37,736 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 16:00:37,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 16:00:37,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:00:37,905 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:00:37,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:00:37,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:00:37,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:00:37,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:00:38,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:00:38,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:00:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 16:00:38,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:00:38,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:38,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2023-08-30 16:00:38,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:38,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 627 treesize of output 599 [2023-08-30 16:00:38,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:38,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 265 [2023-08-30 16:00:38,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:38,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 209 [2023-08-30 16:00:38,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:00:38,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 101 [2023-08-30 16:00:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 16:00:39,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253602702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:00:39,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:00:39,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2023-08-30 16:00:39,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262562038] [2023-08-30 16:00:39,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:00:39,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 16:00:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:00:39,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 16:00:39,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1101, Unknown=13, NotChecked=0, Total=1406 [2023-08-30 16:00:41,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 369 [2023-08-30 16:00:41,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 761 transitions, 15668 flow. Second operand has 38 states, 38 states have (on average 110.71052631578948) internal successors, (4207), 38 states have internal predecessors, (4207), 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) [2023-08-30 16:00:41,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:00:41,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 369 [2023-08-30 16:00:41,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:00:56,433 INFO L130 PetriNetUnfolder]: 27988/54357 cut-off events. [2023-08-30 16:00:56,433 INFO L131 PetriNetUnfolder]: For 969711/969711 co-relation queries the response was YES. [2023-08-30 16:00:57,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378094 conditions, 54357 events. 27988/54357 cut-off events. For 969711/969711 co-relation queries the response was YES. Maximal size of possible extension queue 2288. Compared 546795 event pairs, 4122 based on Foata normal form. 1408/55639 useless extension candidates. Maximal degree in co-relation 378026. Up to 27703 conditions per place. [2023-08-30 16:00:57,141 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 1193 selfloop transitions, 163 changer transitions 109/1465 dead transitions. [2023-08-30 16:00:57,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1465 transitions, 31495 flow [2023-08-30 16:00:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 16:00:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 16:00:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3555 transitions. [2023-08-30 16:00:57,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3107789142407553 [2023-08-30 16:00:57,144 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3555 transitions. [2023-08-30 16:00:57,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3555 transitions. [2023-08-30 16:00:57,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:00:57,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3555 transitions. [2023-08-30 16:00:57,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 114.6774193548387) internal successors, (3555), 31 states have internal predecessors, (3555), 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) [2023-08-30 16:00:57,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 369.0) internal successors, (11808), 32 states have internal predecessors, (11808), 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) [2023-08-30 16:00:57,151 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 369.0) internal successors, (11808), 32 states have internal predecessors, (11808), 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) [2023-08-30 16:00:57,151 INFO L175 Difference]: Start difference. First operand has 266 places, 761 transitions, 15668 flow. Second operand 31 states and 3555 transitions. [2023-08-30 16:00:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1465 transitions, 31495 flow [2023-08-30 16:01:04,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1465 transitions, 30135 flow, removed 595 selfloop flow, removed 14 redundant places. [2023-08-30 16:01:04,610 INFO L231 Difference]: Finished difference. Result has 289 places, 811 transitions, 16386 flow [2023-08-30 16:01:04,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=14986, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=16386, PETRI_PLACES=289, PETRI_TRANSITIONS=811} [2023-08-30 16:01:04,611 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 253 predicate places. [2023-08-30 16:01:04,611 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 811 transitions, 16386 flow [2023-08-30 16:01:04,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 110.71052631578948) internal successors, (4207), 38 states have internal predecessors, (4207), 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) [2023-08-30 16:01:04,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:01:04,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:01:04,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 16:01:04,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:01:04,818 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:01:04,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:01:04,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1306205680, now seen corresponding path program 5 times [2023-08-30 16:01:04,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:01:04,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757949214] [2023-08-30 16:01:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:01:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:01:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:01:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:01:05,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:01:05,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757949214] [2023-08-30 16:01:05,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757949214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:01:05,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686164306] [2023-08-30 16:01:05,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:01:05,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:01:05,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:01:05,237 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:01:05,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 16:01:05,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 16:01:05,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:01:05,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 16:01:05,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:01:05,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:01:05,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:01:05,422 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 16:01:05,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 16:01:05,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 16:01:05,578 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:01:05,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:01:05,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:01:05,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:01:05,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:01:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:01:05,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:01:05,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:01:05,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:01:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 16:01:06,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:01:06,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:01:06,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-08-30 16:01:06,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:01:06,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 343 [2023-08-30 16:01:06,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 69 [2023-08-30 16:01:06,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2023-08-30 16:01:06,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 54 [2023-08-30 16:01:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 16:01:07,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686164306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:01:07,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:01:07,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-08-30 16:01:07,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976365769] [2023-08-30 16:01:07,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:01:07,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 16:01:07,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:01:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 16:01:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1273, Unknown=5, NotChecked=0, Total=1482 [2023-08-30 16:01:10,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:01:11,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 369 [2023-08-30 16:01:11,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 811 transitions, 16386 flow. Second operand has 39 states, 39 states have (on average 110.66666666666667) internal successors, (4316), 39 states have internal predecessors, (4316), 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) [2023-08-30 16:01:11,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:01:11,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 369 [2023-08-30 16:01:11,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:01:28,876 INFO L130 PetriNetUnfolder]: 28459/56044 cut-off events. [2023-08-30 16:01:28,876 INFO L131 PetriNetUnfolder]: For 990627/990627 co-relation queries the response was YES. [2023-08-30 16:01:29,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393643 conditions, 56044 events. 28459/56044 cut-off events. For 990627/990627 co-relation queries the response was YES. Maximal size of possible extension queue 2423. Compared 576978 event pairs, 6462 based on Foata normal form. 280/56148 useless extension candidates. Maximal degree in co-relation 393568. Up to 31063 conditions per place. [2023-08-30 16:01:29,714 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 1308 selfloop transitions, 140 changer transitions 100/1548 dead transitions. [2023-08-30 16:01:29,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1548 transitions, 31718 flow [2023-08-30 16:01:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 16:01:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 16:01:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4481 transitions. [2023-08-30 16:01:29,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3113751650337016 [2023-08-30 16:01:29,717 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4481 transitions. [2023-08-30 16:01:29,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4481 transitions. [2023-08-30 16:01:29,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:01:29,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4481 transitions. [2023-08-30 16:01:29,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 114.8974358974359) internal successors, (4481), 39 states have internal predecessors, (4481), 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) [2023-08-30 16:01:29,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 369.0) internal successors, (14760), 40 states have internal predecessors, (14760), 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) [2023-08-30 16:01:29,728 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 369.0) internal successors, (14760), 40 states have internal predecessors, (14760), 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) [2023-08-30 16:01:29,728 INFO L175 Difference]: Start difference. First operand has 289 places, 811 transitions, 16386 flow. Second operand 39 states and 4481 transitions. [2023-08-30 16:01:29,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1548 transitions, 31718 flow [2023-08-30 16:01:38,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1548 transitions, 30996 flow, removed 264 selfloop flow, removed 17 redundant places. [2023-08-30 16:01:38,415 INFO L231 Difference]: Finished difference. Result has 317 places, 847 transitions, 16845 flow [2023-08-30 16:01:38,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=15759, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16845, PETRI_PLACES=317, PETRI_TRANSITIONS=847} [2023-08-30 16:01:38,416 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 281 predicate places. [2023-08-30 16:01:38,416 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 847 transitions, 16845 flow [2023-08-30 16:01:38,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 110.66666666666667) internal successors, (4316), 39 states have internal predecessors, (4316), 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) [2023-08-30 16:01:38,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:01:38,417 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:01:38,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 16:01:38,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:01:38,617 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:01:38,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:01:38,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1863505249, now seen corresponding path program 6 times [2023-08-30 16:01:38,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:01:38,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532258486] [2023-08-30 16:01:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:01:38,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:01:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:01:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:01:39,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:01:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532258486] [2023-08-30 16:01:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532258486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:01:39,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064970222] [2023-08-30 16:01:39,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 16:01:39,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:01:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:01:39,529 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:01:39,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 16:01:39,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 16:01:39,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:01:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 16:01:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:01:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 16:01:39,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:01:39,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:01:39,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 16:01:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 16:01:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064970222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:01:40,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:01:40,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 21 [2023-08-30 16:01:40,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158506111] [2023-08-30 16:01:40,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:01:40,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 16:01:40,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:01:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 16:01:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-08-30 16:01:41,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 369 [2023-08-30 16:01:41,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 847 transitions, 16845 flow. Second operand has 23 states, 23 states have (on average 136.7391304347826) internal successors, (3145), 23 states have internal predecessors, (3145), 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) [2023-08-30 16:01:41,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:01:41,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 369 [2023-08-30 16:01:41,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:01:56,468 INFO L130 PetriNetUnfolder]: 26758/52583 cut-off events. [2023-08-30 16:01:56,468 INFO L131 PetriNetUnfolder]: For 943068/943068 co-relation queries the response was YES. [2023-08-30 16:01:57,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361161 conditions, 52583 events. 26758/52583 cut-off events. For 943068/943068 co-relation queries the response was YES. Maximal size of possible extension queue 2131. Compared 532681 event pairs, 5019 based on Foata normal form. 1256/53743 useless extension candidates. Maximal degree in co-relation 361084. Up to 30304 conditions per place. [2023-08-30 16:01:57,219 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 318 selfloop transitions, 510 changer transitions 165/993 dead transitions. [2023-08-30 16:01:57,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 993 transitions, 21228 flow [2023-08-30 16:01:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 16:01:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 16:01:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3511 transitions. [2023-08-30 16:01:57,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805962059620596 [2023-08-30 16:01:57,221 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3511 transitions. [2023-08-30 16:01:57,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3511 transitions. [2023-08-30 16:01:57,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:01:57,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3511 transitions. [2023-08-30 16:01:57,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 140.44) internal successors, (3511), 25 states have internal predecessors, (3511), 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) [2023-08-30 16:01:57,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 369.0) internal successors, (9594), 26 states have internal predecessors, (9594), 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) [2023-08-30 16:01:57,227 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 369.0) internal successors, (9594), 26 states have internal predecessors, (9594), 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) [2023-08-30 16:01:57,227 INFO L175 Difference]: Start difference. First operand has 317 places, 847 transitions, 16845 flow. Second operand 25 states and 3511 transitions. [2023-08-30 16:01:57,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 993 transitions, 21228 flow [2023-08-30 16:02:03,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 993 transitions, 20833 flow, removed 50 selfloop flow, removed 18 redundant places. [2023-08-30 16:02:03,422 INFO L231 Difference]: Finished difference. Result has 322 places, 761 transitions, 15975 flow [2023-08-30 16:02:03,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=15819, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15975, PETRI_PLACES=322, PETRI_TRANSITIONS=761} [2023-08-30 16:02:03,423 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 286 predicate places. [2023-08-30 16:02:03,423 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 761 transitions, 15975 flow [2023-08-30 16:02:03,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 136.7391304347826) internal successors, (3145), 23 states have internal predecessors, (3145), 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) [2023-08-30 16:02:03,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:02:03,423 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:02:03,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 16:02:03,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 16:02:03,624 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:02:03,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:02:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1306205681, now seen corresponding path program 6 times [2023-08-30 16:02:03,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:02:03,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190505413] [2023-08-30 16:02:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:02:03,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:02:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:02:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:02:05,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:02:05,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190505413] [2023-08-30 16:02:05,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190505413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:02:05,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049882599] [2023-08-30 16:02:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 16:02:05,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:02:05,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:02:05,436 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:02:05,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 16:02:05,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 16:02:05,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:02:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 16:02:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:02:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:02:06,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:02:06,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:02:06,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-30 16:02:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:02:07,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049882599] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:02:07,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:02:07,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 40 [2023-08-30 16:02:07,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212071906] [2023-08-30 16:02:07,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:02:07,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 16:02:07,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:02:07,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 16:02:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 16:02:11,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 369 [2023-08-30 16:02:11,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 761 transitions, 15975 flow. Second operand has 42 states, 42 states have (on average 126.54761904761905) internal successors, (5315), 42 states have internal predecessors, (5315), 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) [2023-08-30 16:02:11,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:02:11,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 369 [2023-08-30 16:02:11,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:02:27,474 INFO L130 PetriNetUnfolder]: 27415/53504 cut-off events. [2023-08-30 16:02:27,474 INFO L131 PetriNetUnfolder]: For 1002189/1002189 co-relation queries the response was YES. [2023-08-30 16:02:28,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384845 conditions, 53504 events. 27415/53504 cut-off events. For 1002189/1002189 co-relation queries the response was YES. Maximal size of possible extension queue 2249. Compared 540782 event pairs, 10686 based on Foata normal form. 216/53624 useless extension candidates. Maximal degree in co-relation 384768. Up to 29398 conditions per place. [2023-08-30 16:02:28,428 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 1116 selfloop transitions, 90 changer transitions 64/1270 dead transitions. [2023-08-30 16:02:28,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1270 transitions, 28505 flow [2023-08-30 16:02:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 16:02:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 16:02:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3911 transitions. [2023-08-30 16:02:28,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3532971996386631 [2023-08-30 16:02:28,431 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3911 transitions. [2023-08-30 16:02:28,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3911 transitions. [2023-08-30 16:02:28,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:02:28,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3911 transitions. [2023-08-30 16:02:28,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 130.36666666666667) internal successors, (3911), 30 states have internal predecessors, (3911), 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) [2023-08-30 16:02:28,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 369.0) internal successors, (11439), 31 states have internal predecessors, (11439), 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) [2023-08-30 16:02:28,441 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 369.0) internal successors, (11439), 31 states have internal predecessors, (11439), 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) [2023-08-30 16:02:28,441 INFO L175 Difference]: Start difference. First operand has 322 places, 761 transitions, 15975 flow. Second operand 30 states and 3911 transitions. [2023-08-30 16:02:28,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1270 transitions, 28505 flow [2023-08-30 16:02:36,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1270 transitions, 27510 flow, removed 27 selfloop flow, removed 17 redundant places. [2023-08-30 16:02:36,958 INFO L231 Difference]: Finished difference. Result has 326 places, 780 transitions, 16205 flow [2023-08-30 16:02:36,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=15296, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=16205, PETRI_PLACES=326, PETRI_TRANSITIONS=780} [2023-08-30 16:02:36,959 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 290 predicate places. [2023-08-30 16:02:36,959 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 780 transitions, 16205 flow [2023-08-30 16:02:36,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 126.54761904761905) internal successors, (5315), 42 states have internal predecessors, (5315), 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) [2023-08-30 16:02:36,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:02:36,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:02:36,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 16:02:37,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 16:02:37,165 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:02:37,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:02:37,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1303807210, now seen corresponding path program 6 times [2023-08-30 16:02:37,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:02:37,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833582057] [2023-08-30 16:02:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:02:37,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:02:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:02:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 16:02:38,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:02:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833582057] [2023-08-30 16:02:38,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833582057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:02:38,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5155171] [2023-08-30 16:02:38,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 16:02:38,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:02:38,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:02:38,045 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:02:38,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 16:02:38,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 16:02:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:02:38,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 16:02:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:02:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:02:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:02:38,262 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 16:02:38,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 16:02:38,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 16:02:38,434 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:02:38,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:02:38,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:02:38,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:02:38,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:02:38,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:02:38,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:02:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:02:38,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 16:02:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 16:02:38,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:02:41,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:02:41,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-08-30 16:02:41,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:02:41,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 165 [2023-08-30 16:02:41,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 128 [2023-08-30 16:02:41,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 116 [2023-08-30 16:02:41,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2023-08-30 16:02:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 16:02:42,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5155171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:02:42,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:02:42,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 41 [2023-08-30 16:02:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632617978] [2023-08-30 16:02:42,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:02:42,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 16:02:42,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:02:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 16:02:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1599, Unknown=6, NotChecked=0, Total=1806 [2023-08-30 16:02:44,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:02:47,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 369 [2023-08-30 16:02:47,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 780 transitions, 16205 flow. Second operand has 43 states, 43 states have (on average 109.53488372093024) internal successors, (4710), 43 states have internal predecessors, (4710), 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) [2023-08-30 16:02:47,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:02:47,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 369 [2023-08-30 16:02:47,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:03:08,351 INFO L130 PetriNetUnfolder]: 31416/61777 cut-off events. [2023-08-30 16:03:08,351 INFO L131 PetriNetUnfolder]: For 1200340/1200340 co-relation queries the response was YES. [2023-08-30 16:03:09,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434925 conditions, 61777 events. 31416/61777 cut-off events. For 1200340/1200340 co-relation queries the response was YES. Maximal size of possible extension queue 2655. Compared 644371 event pairs, 9375 based on Foata normal form. 1310/62991 useless extension candidates. Maximal degree in co-relation 434845. Up to 20928 conditions per place. [2023-08-30 16:03:09,390 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 1161 selfloop transitions, 106 changer transitions 330/1597 dead transitions. [2023-08-30 16:03:09,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1597 transitions, 35368 flow [2023-08-30 16:03:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 16:03:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 16:03:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3524 transitions. [2023-08-30 16:03:09,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3080688871404843 [2023-08-30 16:03:09,393 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3524 transitions. [2023-08-30 16:03:09,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3524 transitions. [2023-08-30 16:03:09,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:03:09,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3524 transitions. [2023-08-30 16:03:09,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 113.6774193548387) internal successors, (3524), 31 states have internal predecessors, (3524), 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) [2023-08-30 16:03:09,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 369.0) internal successors, (11808), 32 states have internal predecessors, (11808), 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) [2023-08-30 16:03:09,403 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 369.0) internal successors, (11808), 32 states have internal predecessors, (11808), 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) [2023-08-30 16:03:09,403 INFO L175 Difference]: Start difference. First operand has 326 places, 780 transitions, 16205 flow. Second operand 31 states and 3524 transitions. [2023-08-30 16:03:09,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1597 transitions, 35368 flow [2023-08-30 16:03:20,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1597 transitions, 35241 flow, removed 41 selfloop flow, removed 16 redundant places. [2023-08-30 16:03:20,756 INFO L231 Difference]: Finished difference. Result has 336 places, 714 transitions, 14765 flow [2023-08-30 16:03:20,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=15701, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14765, PETRI_PLACES=336, PETRI_TRANSITIONS=714} [2023-08-30 16:03:20,757 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 300 predicate places. [2023-08-30 16:03:20,758 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 714 transitions, 14765 flow [2023-08-30 16:03:20,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 109.53488372093024) internal successors, (4710), 43 states have internal predecessors, (4710), 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) [2023-08-30 16:03:20,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:03:20,759 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:03:20,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 16:03:20,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 16:03:20,965 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:03:20,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:03:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash -58592056, now seen corresponding path program 6 times [2023-08-30 16:03:20,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:03:20,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894083293] [2023-08-30 16:03:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:03:20,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:03:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:03:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:03:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:03:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894083293] [2023-08-30 16:03:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894083293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:03:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699624163] [2023-08-30 16:03:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 16:03:22,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:03:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:03:22,519 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:03:22,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 16:03:22,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 16:03:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:03:22,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 16:03:22,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:03:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 16:03:22,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:03:23,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:03:23,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 16:03:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:03:23,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699624163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:03:23,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:03:23,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 6] total 32 [2023-08-30 16:03:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386803116] [2023-08-30 16:03:23,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:03:23,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 16:03:23,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:03:23,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 16:03:23,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 16:03:26,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 369 [2023-08-30 16:03:26,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 714 transitions, 14765 flow. Second operand has 34 states, 34 states have (on average 132.5) internal successors, (4505), 34 states have internal predecessors, (4505), 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) [2023-08-30 16:03:26,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:03:26,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 369 [2023-08-30 16:03:26,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:03:43,111 INFO L130 PetriNetUnfolder]: 27589/55024 cut-off events. [2023-08-30 16:03:43,111 INFO L131 PetriNetUnfolder]: For 1186928/1186928 co-relation queries the response was YES. [2023-08-30 16:03:43,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393474 conditions, 55024 events. 27589/55024 cut-off events. For 1186928/1186928 co-relation queries the response was YES. Maximal size of possible extension queue 2415. Compared 574543 event pairs, 8822 based on Foata normal form. 1764/56692 useless extension candidates. Maximal degree in co-relation 393393. Up to 30803 conditions per place. [2023-08-30 16:03:43,922 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 311 selfloop transitions, 596 changer transitions 36/943 dead transitions. [2023-08-30 16:03:43,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 943 transitions, 21049 flow [2023-08-30 16:03:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 16:03:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 16:03:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4748 transitions. [2023-08-30 16:03:43,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36763453348819203 [2023-08-30 16:03:43,926 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4748 transitions. [2023-08-30 16:03:43,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4748 transitions. [2023-08-30 16:03:43,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:03:43,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4748 transitions. [2023-08-30 16:03:43,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 135.65714285714284) internal successors, (4748), 35 states have internal predecessors, (4748), 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) [2023-08-30 16:03:43,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 369.0) internal successors, (13284), 36 states have internal predecessors, (13284), 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) [2023-08-30 16:03:43,934 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 369.0) internal successors, (13284), 36 states have internal predecessors, (13284), 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) [2023-08-30 16:03:43,934 INFO L175 Difference]: Start difference. First operand has 336 places, 714 transitions, 14765 flow. Second operand 35 states and 4748 transitions. [2023-08-30 16:03:43,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 943 transitions, 21049 flow [2023-08-30 16:03:51,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 943 transitions, 20555 flow, removed 78 selfloop flow, removed 29 redundant places. [2023-08-30 16:03:51,587 INFO L231 Difference]: Finished difference. Result has 322 places, 798 transitions, 18668 flow [2023-08-30 16:03:51,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=13845, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18668, PETRI_PLACES=322, PETRI_TRANSITIONS=798} [2023-08-30 16:03:51,588 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 286 predicate places. [2023-08-30 16:03:51,588 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 798 transitions, 18668 flow [2023-08-30 16:03:51,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 132.5) internal successors, (4505), 34 states have internal predecessors, (4505), 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) [2023-08-30 16:03:51,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:03:51,588 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:03:51,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 16:03:51,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 16:03:51,789 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:03:51,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:03:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1088593480, now seen corresponding path program 7 times [2023-08-30 16:03:51,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:03:51,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933160243] [2023-08-30 16:03:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:03:51,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:03:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:03:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:03:53,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:03:53,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933160243] [2023-08-30 16:03:53,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933160243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:03:53,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279528006] [2023-08-30 16:03:53,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 16:03:53,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:03:53,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:03:53,716 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:03:53,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 16:03:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:03:53,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 16:03:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:03:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 16:03:54,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:03:54,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:03:54,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 16:03:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-30 16:03:54,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279528006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:03:54,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:03:54,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9, 6] total 34 [2023-08-30 16:03:54,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312560142] [2023-08-30 16:03:54,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:03:54,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 16:03:54,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:03:54,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 16:03:54,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 16:03:57,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 369 [2023-08-30 16:03:57,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 798 transitions, 18668 flow. Second operand has 36 states, 36 states have (on average 130.47222222222223) internal successors, (4697), 36 states have internal predecessors, (4697), 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) [2023-08-30 16:03:57,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:03:57,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 369 [2023-08-30 16:03:57,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:04:13,932 INFO L130 PetriNetUnfolder]: 28223/55914 cut-off events. [2023-08-30 16:04:13,932 INFO L131 PetriNetUnfolder]: For 1370401/1370401 co-relation queries the response was YES. [2023-08-30 16:04:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434761 conditions, 55914 events. 28223/55914 cut-off events. For 1370401/1370401 co-relation queries the response was YES. Maximal size of possible extension queue 2442. Compared 582109 event pairs, 9707 based on Foata normal form. 296/56102 useless extension candidates. Maximal degree in co-relation 434682. Up to 37292 conditions per place. [2023-08-30 16:04:14,976 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 441 selfloop transitions, 463 changer transitions 16/920 dead transitions. [2023-08-30 16:04:14,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 920 transitions, 22566 flow [2023-08-30 16:04:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 16:04:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 16:04:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4116 transitions. [2023-08-30 16:04:14,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35982166273275634 [2023-08-30 16:04:14,980 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4116 transitions. [2023-08-30 16:04:14,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4116 transitions. [2023-08-30 16:04:14,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:04:14,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4116 transitions. [2023-08-30 16:04:14,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 132.7741935483871) internal successors, (4116), 31 states have internal predecessors, (4116), 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) [2023-08-30 16:04:14,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 369.0) internal successors, (11808), 32 states have internal predecessors, (11808), 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) [2023-08-30 16:04:14,990 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 369.0) internal successors, (11808), 32 states have internal predecessors, (11808), 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) [2023-08-30 16:04:14,990 INFO L175 Difference]: Start difference. First operand has 322 places, 798 transitions, 18668 flow. Second operand 31 states and 4116 transitions. [2023-08-30 16:04:14,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 920 transitions, 22566 flow [2023-08-30 16:04:25,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 920 transitions, 22004 flow, removed 238 selfloop flow, removed 17 redundant places. [2023-08-30 16:04:25,077 INFO L231 Difference]: Finished difference. Result has 339 places, 881 transitions, 21279 flow [2023-08-30 16:04:25,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=18080, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21279, PETRI_PLACES=339, PETRI_TRANSITIONS=881} [2023-08-30 16:04:25,078 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 303 predicate places. [2023-08-30 16:04:25,078 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 881 transitions, 21279 flow [2023-08-30 16:04:25,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 130.47222222222223) internal successors, (4697), 36 states have internal predecessors, (4697), 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) [2023-08-30 16:04:25,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:04:25,078 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:04:25,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 16:04:25,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:04:25,279 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:04:25,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:04:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash -748887206, now seen corresponding path program 7 times [2023-08-30 16:04:25,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:04:25,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741581121] [2023-08-30 16:04:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:04:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:04:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:04:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:04:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:04:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741581121] [2023-08-30 16:04:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741581121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:04:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834024541] [2023-08-30 16:04:27,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 16:04:27,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:04:27,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:04:27,500 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:04:27,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 16:04:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:04:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 16:04:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:04:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 16:04:27,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:04:27,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:04:27,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 16:04:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-30 16:04:28,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834024541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:04:28,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:04:28,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 5] total 28 [2023-08-30 16:04:28,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617487343] [2023-08-30 16:04:28,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:04:28,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 16:04:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:04:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 16:04:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2023-08-30 16:04:32,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 369 [2023-08-30 16:04:32,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 881 transitions, 21279 flow. Second operand has 30 states, 30 states have (on average 128.46666666666667) internal successors, (3854), 30 states have internal predecessors, (3854), 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) [2023-08-30 16:04:32,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:04:32,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 369 [2023-08-30 16:04:32,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:04:56,069 INFO L130 PetriNetUnfolder]: 29163/58010 cut-off events. [2023-08-30 16:04:56,069 INFO L131 PetriNetUnfolder]: For 1531785/1531785 co-relation queries the response was YES. [2023-08-30 16:04:56,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456828 conditions, 58010 events. 29163/58010 cut-off events. For 1531785/1531785 co-relation queries the response was YES. Maximal size of possible extension queue 2442. Compared 605453 event pairs, 9654 based on Foata normal form. 1834/59844 useless extension candidates. Maximal degree in co-relation 456745. Up to 33775 conditions per place. [2023-08-30 16:04:57,116 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 570 selfloop transitions, 270 changer transitions 718/1558 dead transitions. [2023-08-30 16:04:57,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1558 transitions, 38415 flow [2023-08-30 16:04:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-30 16:04:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-30 16:04:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 7245 transitions. [2023-08-30 16:04:57,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35698447893569846 [2023-08-30 16:04:57,121 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 7245 transitions. [2023-08-30 16:04:57,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 7245 transitions. [2023-08-30 16:04:57,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:04:57,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 7245 transitions. [2023-08-30 16:04:57,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 131.72727272727272) internal successors, (7245), 55 states have internal predecessors, (7245), 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) [2023-08-30 16:04:57,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 369.0) internal successors, (20664), 56 states have internal predecessors, (20664), 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) [2023-08-30 16:04:57,134 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 369.0) internal successors, (20664), 56 states have internal predecessors, (20664), 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) [2023-08-30 16:04:57,134 INFO L175 Difference]: Start difference. First operand has 339 places, 881 transitions, 21279 flow. Second operand 55 states and 7245 transitions. [2023-08-30 16:04:57,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1558 transitions, 38415 flow [2023-08-30 16:05:08,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1558 transitions, 36718 flow, removed 329 selfloop flow, removed 14 redundant places. [2023-08-30 16:05:08,220 INFO L231 Difference]: Finished difference. Result has 400 places, 837 transitions, 20358 flow [2023-08-30 16:05:08,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=19690, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=20358, PETRI_PLACES=400, PETRI_TRANSITIONS=837} [2023-08-30 16:05:08,221 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 364 predicate places. [2023-08-30 16:05:08,221 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 837 transitions, 20358 flow [2023-08-30 16:05:08,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 128.46666666666667) internal successors, (3854), 30 states have internal predecessors, (3854), 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) [2023-08-30 16:05:08,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:05:08,221 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:05:08,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 16:05:08,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 16:05:08,422 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:05:08,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:05:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash -61821016, now seen corresponding path program 7 times [2023-08-30 16:05:08,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:05:08,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582183068] [2023-08-30 16:05:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:05:08,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:05:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:05:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:05:09,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:05:09,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582183068] [2023-08-30 16:05:09,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582183068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:05:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028420620] [2023-08-30 16:05:09,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 16:05:09,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:05:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:05:09,522 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:05:09,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 16:05:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:05:09,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 16:05:09,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:05:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 16:05:10,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:05:10,263 INFO L321 Elim1Store]: treesize reduction 4, result has 95.9 percent of original size [2023-08-30 16:05:10,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 107 [2023-08-30 16:05:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-30 16:05:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028420620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:05:10,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:05:10,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 35 [2023-08-30 16:05:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242195787] [2023-08-30 16:05:10,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:05:10,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 16:05:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:05:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 16:05:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2023-08-30 16:05:13,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 369 [2023-08-30 16:05:13,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 837 transitions, 20358 flow. Second operand has 37 states, 37 states have (on average 131.45945945945945) internal successors, (4864), 37 states have internal predecessors, (4864), 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) [2023-08-30 16:05:13,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:05:13,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 369 [2023-08-30 16:05:13,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:05:33,652 INFO L130 PetriNetUnfolder]: 28572/56689 cut-off events. [2023-08-30 16:05:33,652 INFO L131 PetriNetUnfolder]: For 1476432/1476432 co-relation queries the response was YES. [2023-08-30 16:05:34,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446400 conditions, 56689 events. 28572/56689 cut-off events. For 1476432/1476432 co-relation queries the response was YES. Maximal size of possible extension queue 2549. Compared 593353 event pairs, 5688 based on Foata normal form. 624/57313 useless extension candidates. Maximal degree in co-relation 446295. Up to 46122 conditions per place. [2023-08-30 16:05:35,069 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 778 selfloop transitions, 271 changer transitions 42/1091 dead transitions. [2023-08-30 16:05:35,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1091 transitions, 27256 flow [2023-08-30 16:05:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 16:05:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 16:05:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 6158 transitions. [2023-08-30 16:05:35,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36279014964062684 [2023-08-30 16:05:35,073 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 6158 transitions. [2023-08-30 16:05:35,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 6158 transitions. [2023-08-30 16:05:35,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:05:35,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 6158 transitions. [2023-08-30 16:05:35,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 133.8695652173913) internal successors, (6158), 46 states have internal predecessors, (6158), 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) [2023-08-30 16:05:35,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 369.0) internal successors, (17343), 47 states have internal predecessors, (17343), 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) [2023-08-30 16:05:35,085 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 369.0) internal successors, (17343), 47 states have internal predecessors, (17343), 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) [2023-08-30 16:05:35,085 INFO L175 Difference]: Start difference. First operand has 400 places, 837 transitions, 20358 flow. Second operand 46 states and 6158 transitions. [2023-08-30 16:05:35,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1091 transitions, 27256 flow [2023-08-30 16:05:51,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1091 transitions, 25938 flow, removed 313 selfloop flow, removed 38 redundant places. [2023-08-30 16:05:51,838 INFO L231 Difference]: Finished difference. Result has 385 places, 1010 transitions, 24760 flow [2023-08-30 16:05:51,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=19283, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=24760, PETRI_PLACES=385, PETRI_TRANSITIONS=1010} [2023-08-30 16:05:51,839 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 349 predicate places. [2023-08-30 16:05:51,839 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1010 transitions, 24760 flow [2023-08-30 16:05:51,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 131.45945945945945) internal successors, (4864), 37 states have internal predecessors, (4864), 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) [2023-08-30 16:05:51,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:05:51,839 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:05:51,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 16:05:52,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 16:05:52,040 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:05:52,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:05:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash -936821703, now seen corresponding path program 8 times [2023-08-30 16:05:52,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:05:52,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464009320] [2023-08-30 16:05:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:05:52,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:05:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:05:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:05:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:05:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464009320] [2023-08-30 16:05:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464009320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:05:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367067202] [2023-08-30 16:05:53,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:05:53,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:05:53,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:05:53,246 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:05:53,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 16:05:53,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:05:53,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:05:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 16:05:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:05:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 16:05:53,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:05:53,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:05:53,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 16:05:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 16:05:53,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367067202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:05:53,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:05:53,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 6] total 29 [2023-08-30 16:05:53,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616413658] [2023-08-30 16:05:53,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:05:53,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 16:05:53,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:05:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 16:05:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2023-08-30 16:05:57,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 369 [2023-08-30 16:05:57,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1010 transitions, 24760 flow. Second operand has 31 states, 31 states have (on average 138.70967741935485) internal successors, (4300), 31 states have internal predecessors, (4300), 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) [2023-08-30 16:05:57,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:05:57,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 369 [2023-08-30 16:05:57,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:06:16,697 INFO L130 PetriNetUnfolder]: 27612/54161 cut-off events. [2023-08-30 16:06:16,697 INFO L131 PetriNetUnfolder]: For 1436693/1436693 co-relation queries the response was YES. [2023-08-30 16:06:17,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429171 conditions, 54161 events. 27612/54161 cut-off events. For 1436693/1436693 co-relation queries the response was YES. Maximal size of possible extension queue 2445. Compared 557556 event pairs, 3583 based on Foata normal form. 824/54985 useless extension candidates. Maximal degree in co-relation 429073. Up to 30462 conditions per place. [2023-08-30 16:06:17,784 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 154 selfloop transitions, 557 changer transitions 426/1137 dead transitions. [2023-08-30 16:06:17,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1137 transitions, 29070 flow [2023-08-30 16:06:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 16:06:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 16:06:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4104 transitions. [2023-08-30 16:06:17,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.383515559293524 [2023-08-30 16:06:17,787 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4104 transitions. [2023-08-30 16:06:17,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4104 transitions. [2023-08-30 16:06:17,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:06:17,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4104 transitions. [2023-08-30 16:06:17,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 141.51724137931035) internal successors, (4104), 29 states have internal predecessors, (4104), 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) [2023-08-30 16:06:17,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 369.0) internal successors, (11070), 30 states have internal predecessors, (11070), 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) [2023-08-30 16:06:17,794 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 369.0) internal successors, (11070), 30 states have internal predecessors, (11070), 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) [2023-08-30 16:06:17,794 INFO L175 Difference]: Start difference. First operand has 385 places, 1010 transitions, 24760 flow. Second operand 29 states and 4104 transitions. [2023-08-30 16:06:17,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1137 transitions, 29070 flow [2023-08-30 16:06:31,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1137 transitions, 28441 flow, removed 127 selfloop flow, removed 26 redundant places. [2023-08-30 16:06:31,175 INFO L231 Difference]: Finished difference. Result has 385 places, 668 transitions, 17216 flow [2023-08-30 16:06:31,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=23601, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=17216, PETRI_PLACES=385, PETRI_TRANSITIONS=668} [2023-08-30 16:06:31,176 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 349 predicate places. [2023-08-30 16:06:31,176 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 668 transitions, 17216 flow [2023-08-30 16:06:31,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 138.70967741935485) internal successors, (4300), 31 states have internal predecessors, (4300), 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) [2023-08-30 16:06:31,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:06:31,177 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:06:31,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-08-30 16:06:31,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-30 16:06:31,383 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 16:06:31,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:06:31,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1265866132, now seen corresponding path program 8 times [2023-08-30 16:06:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:06:31,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332174393] [2023-08-30 16:06:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:06:31,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:06:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:06:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:06:34,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:06:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332174393] [2023-08-30 16:06:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332174393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:06:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191706690] [2023-08-30 16:06:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:06:34,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:06:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:06:34,317 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:06:34,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 16:06:34,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:06:34,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:06:34,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 16:06:34,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:06:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:06:34,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:06:34,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:06:34,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 16:06:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-30 16:06:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191706690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:06:35,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:06:35,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 6] total 35 [2023-08-30 16:06:35,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681595704] [2023-08-30 16:06:35,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:06:35,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 16:06:35,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:06:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 16:06:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2023-08-30 16:06:40,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 369 [2023-08-30 16:06:40,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 668 transitions, 17216 flow. Second operand has 37 states, 37 states have (on average 128.45945945945945) internal successors, (4753), 37 states have internal predecessors, (4753), 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) [2023-08-30 16:06:40,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:06:40,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 369 [2023-08-30 16:06:40,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:06:48,254 INFO L130 PetriNetUnfolder]: 7130/13913 cut-off events. [2023-08-30 16:06:48,254 INFO L131 PetriNetUnfolder]: For 352615/352615 co-relation queries the response was YES. [2023-08-30 16:06:48,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132081 conditions, 13913 events. 7130/13913 cut-off events. For 352615/352615 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 113513 event pairs, 1611 based on Foata normal form. 922/14835 useless extension candidates. Maximal degree in co-relation 131992. Up to 7141 conditions per place. [2023-08-30 16:06:48,376 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 0 selfloop transitions, 0 changer transitions 871/871 dead transitions. [2023-08-30 16:06:48,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 871 transitions, 22744 flow [2023-08-30 16:06:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 16:06:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 16:06:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6379 transitions. [2023-08-30 16:06:48,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35280128311487197 [2023-08-30 16:06:48,380 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6379 transitions. [2023-08-30 16:06:48,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6379 transitions. [2023-08-30 16:06:48,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:06:48,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6379 transitions. [2023-08-30 16:06:48,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 130.18367346938774) internal successors, (6379), 49 states have internal predecessors, (6379), 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) [2023-08-30 16:06:48,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 369.0) internal successors, (18450), 50 states have internal predecessors, (18450), 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) [2023-08-30 16:06:48,392 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 369.0) internal successors, (18450), 50 states have internal predecessors, (18450), 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) [2023-08-30 16:06:48,392 INFO L175 Difference]: Start difference. First operand has 385 places, 668 transitions, 17216 flow. Second operand 49 states and 6379 transitions. [2023-08-30 16:06:48,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 871 transitions, 22744 flow [2023-08-30 16:06:49,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 871 transitions, 17223 flow, removed 192 selfloop flow, removed 55 redundant places. [2023-08-30 16:06:49,706 INFO L231 Difference]: Finished difference. Result has 281 places, 0 transitions, 0 flow [2023-08-30 16:06:49,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=11754, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=0, PETRI_PLACES=281, PETRI_TRANSITIONS=0} [2023-08-30 16:06:49,707 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 245 predicate places. [2023-08-30 16:06:49,707 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 0 transitions, 0 flow [2023-08-30 16:06:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 128.45945945945945) internal successors, (4753), 37 states have internal predecessors, (4753), 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) [2023-08-30 16:06:49,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 30 remaining) [2023-08-30 16:06:49,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 30 remaining) [2023-08-30 16:06:49,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 30 remaining) [2023-08-30 16:06:49,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 30 remaining) [2023-08-30 16:06:49,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 30 remaining) [2023-08-30 16:06:49,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 30 remaining) [2023-08-30 16:06:49,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 30 remaining) [2023-08-30 16:06:49,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 30 remaining) [2023-08-30 16:06:49,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 30 remaining) [2023-08-30 16:06:49,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 30 remaining) [2023-08-30 16:06:49,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 30 remaining) [2023-08-30 16:06:49,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 30 remaining) [2023-08-30 16:06:49,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 30 remaining) [2023-08-30 16:06:49,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 30 remaining) [2023-08-30 16:06:49,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 30 remaining) [2023-08-30 16:06:49,712 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 30 remaining) [2023-08-30 16:06:49,712 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 30 remaining) [2023-08-30 16:06:49,712 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 30 remaining) [2023-08-30 16:06:49,712 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 30 remaining) [2023-08-30 16:06:49,712 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 30 remaining) [2023-08-30 16:06:49,712 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 30 remaining) [2023-08-30 16:06:49,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 30 remaining) [2023-08-30 16:06:49,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 30 remaining) [2023-08-30 16:06:49,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 30 remaining) [2023-08-30 16:06:49,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 30 remaining) [2023-08-30 16:06:49,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 30 remaining) [2023-08-30 16:06:49,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 30 remaining) [2023-08-30 16:06:49,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 30 remaining) [2023-08-30 16:06:49,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 30 remaining) [2023-08-30 16:06:49,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 30 remaining) [2023-08-30 16:06:49,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 16:06:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:06:49,920 INFO L445 BasicCegarLoop]: Path program histogram: [8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:06:49,924 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 16:06:49,924 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 16:06:49,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:06:49 BasicIcfg [2023-08-30 16:06:49,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 16:06:49,926 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 16:06:49,926 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 16:06:49,927 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 16:06:49,927 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:55:34" (3/4) ... [2023-08-30 16:06:49,928 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 16:06:49,932 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 16:06:49,932 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 16:06:49,938 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2023-08-30 16:06:49,939 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 16:06:49,939 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 16:06:49,939 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 16:06:49,989 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 16:06:49,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 16:06:49,989 INFO L158 Benchmark]: Toolchain (without parser) took 676678.06ms. Allocated memory was 90.2MB in the beginning and 15.0GB in the end (delta: 14.9GB). Free memory was 68.0MB in the beginning and 12.6GB in the end (delta: -12.5GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2023-08-30 16:06:49,990 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 67.1MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:06:49,990 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.79ms. Allocated memory is still 90.2MB. Free memory was 67.8MB in the beginning and 55.7MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 16:06:49,990 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.60ms. Allocated memory is still 90.2MB. Free memory was 55.6MB in the beginning and 53.3MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 16:06:49,990 INFO L158 Benchmark]: Boogie Preprocessor took 55.63ms. Allocated memory is still 90.2MB. Free memory was 53.3MB in the beginning and 51.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:06:49,991 INFO L158 Benchmark]: RCFGBuilder took 759.43ms. Allocated memory is still 90.2MB. Free memory was 51.5MB in the beginning and 60.1MB in the end (delta: -8.7MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2023-08-30 16:06:49,991 INFO L158 Benchmark]: TraceAbstraction took 675437.62ms. Allocated memory was 90.2MB in the beginning and 15.0GB in the end (delta: 14.9GB). Free memory was 59.3MB in the beginning and 12.6GB in the end (delta: -12.5GB). Peak memory consumption was 2.9GB. Max. memory is 16.1GB. [2023-08-30 16:06:49,992 INFO L158 Benchmark]: Witness Printer took 62.77ms. Allocated memory is still 15.0GB. Free memory was 12.6GB in the beginning and 12.6GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 16:06:49,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 67.1MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.79ms. Allocated memory is still 90.2MB. Free memory was 67.8MB in the beginning and 55.7MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.60ms. Allocated memory is still 90.2MB. Free memory was 55.6MB in the beginning and 53.3MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.63ms. Allocated memory is still 90.2MB. Free memory was 53.3MB in the beginning and 51.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 759.43ms. Allocated memory is still 90.2MB. Free memory was 51.5MB in the beginning and 60.1MB in the end (delta: -8.7MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * TraceAbstraction took 675437.62ms. Allocated memory was 90.2MB in the beginning and 15.0GB in the end (delta: 14.9GB). Free memory was 59.3MB in the beginning and 12.6GB in the end (delta: -12.5GB). Peak memory consumption was 2.9GB. Max. memory is 16.1GB. * Witness Printer took 62.77ms. Allocated memory is still 15.0GB. Free memory was 12.6GB in the beginning and 12.6GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.4s, 169 PlacesBefore, 36 PlacesAfterwards, 174 TransitionsBefore, 33 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 7 FixpointIterations, 120 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 4 ConcurrentYvCompositions, 8 ChoiceCompositions, 177 TotalNumberOfCompositions, 3067 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1845, independent: 1694, independent conditional: 0, independent unconditional: 1694, dependent: 151, dependent conditional: 0, dependent unconditional: 151, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 630, independent: 606, independent conditional: 0, independent unconditional: 606, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1845, independent: 1088, independent conditional: 0, independent unconditional: 1088, dependent: 127, dependent conditional: 0, dependent unconditional: 127, unknown: 630, unknown conditional: 0, unknown unconditional: 630] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 79, Positive conditional cache size: 0, Positive unconditional cache size: 79, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 51]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 51]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 56]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 56]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 69]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 69]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 74]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 74]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 76]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 76]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 112]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 112]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 112]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 112]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 216 locations, 30 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: 675.3s, OverallIterations: 52, TraceHistogramMax: 10, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 580.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.5s, HoareTripleCheckerStatistics: 354 mSolverCounterUnknown, 28915 SdHoareTripleChecker+Valid, 103.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26905 mSDsluCounter, 105533 SdHoareTripleChecker+Invalid, 92.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 201 IncrementalHoareTripleChecker+Unchecked, 104744 mSDsCounter, 2108 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 152452 IncrementalHoareTripleChecker+Invalid, 155115 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2108 mSolverCounterUnsat, 789 mSDtfsCounter, 152452 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2644 GetRequests, 925 SyntacticMatches, 20 SemanticMatches, 1699 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17041 ImplicationChecksByTransitivity, 72.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24760occurred in iteration=50, InterpolantAutomatonStates: 1016, 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: 0.7s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 69.7s InterpolantComputationTime, 1601 NumberOfCodeBlocks, 1568 NumberOfCodeBlocksAsserted, 134 NumberOfCheckSat, 2167 ConstructedInterpolants, 191 QuantifiedInterpolants, 42431 SizeOfPredicates, 376 NumberOfNonLiveVariables, 12484 ConjunctsInSsa, 1100 ConjunctsInUnsatCore, 136 InterpolantComputations, 15 PerfectInterpolantSequences, 768/1913 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 16 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 16:06:50,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE